CN115063330A - Hair rendering method, device, electronic device and storage medium - Google Patents

Abstract

The present disclosure provides a hair rendering method, apparatus, electronic device and storage medium, wherein the method comprises: acquiring a hair model and a color map corresponding to the hair model; the hair model comprises a plurality of semitransparent hair piece models which are arranged in a stacked mode; performing opaque rendering on each semitransparent hairpin model by using a color map to obtain a first rendering result of the semitransparent hairpin model, wherein the first rendering result comprises depth information of the semitransparent hairpin model relative to the virtual camera; performing semi-transparent rendering on the semi-transparent hairpiece model by using the color mapping to obtain a second rendering result of the semi-transparent hairpiece model; obtaining a rendering image corresponding to the semitransparent hairpiece model based on the first rendering result and the second rendering result; and fusing rendering images corresponding to the plurality of semitransparent hairpiece models respectively to obtain rendering images corresponding to the hair models. According to the embodiment of the disclosure, the accuracy of the rendering sequence of the plurality of semitransparent objects can be improved.

Description

Hair rendering method, device, electronic device and storage medium

technical field

The present disclosure relates to the technical field of image processing, and in particular, to a hair rendering method, a hair rendering apparatus, an electronic device, and a computer-readable storage medium.

Background technique

With the development of image processing technology, the image rendering technology is becoming more and more mature, and the rendering effect of the image obtained through image rendering is getting closer and closer to the real image. However, in the related art, in the process of image rendering, for multiple translucent models in the virtual scene (for example: the hair model of a hyper-realistic character), it is usually necessary to mix the colors of the multiple translucent models. Therefore, , the depth value cannot be written during the rendering process, which results in that there is no positional relationship between multiple translucent models in the virtual scene, which is prone to the problem of wrong rendering order, resulting in wrong rendering results.

SUMMARY OF THE INVENTION

Embodiments of the present disclosure provide at least a hair rendering method, a hair rendering apparatus, an electronic device, and a computer-readable storage medium.

Embodiments of the present disclosure provide a hair rendering method, including:

Obtain a hair model and a color map corresponding to the hair model; the hair model includes a plurality of translucent hair piece models arranged in layers, and each translucent hair piece model is modeled and generated according to the hair pieces formed by a plurality of hairs. The color map includes a plurality of color channels and a transparency channel, and the value of each pixel in the color map in the transparency channel is used to represent the transparency information of the pixel;

For each translucent hair piece model, use the color map to perform opaque rendering on the translucent hair piece model, to obtain a first rendering result of the translucent hair piece model, where the first rendering result includes all The depth information of the translucent hair piece model relative to the virtual camera;

Perform translucent rendering on the translucent hair piece model by using the color map to obtain a second rendering result of the translucent hair piece model;

obtaining a rendered image corresponding to the translucent hair piece model based on the first rendering result and the second rendering result;

The rendered images corresponding to the multiple translucent hair piece models are fused to obtain the rendered images corresponding to the hair model.

In the embodiment of the present disclosure, when the hair model includes a plurality of translucent hair piece models arranged in layers, opaque rendering is first performed on each translucent hair piece model, and then translucent rendering is performed on each translucent hair piece The rendered image corresponding to each translucent hair piece model is obtained, and then the rendered images corresponding to the multiple translucent hair piece models are fused to obtain the rendered image corresponding to the hair model. In this way, each translucent can be obtained by opaque rendering. The depth information of the hair piece model relative to the virtual camera can reduce the rendering sequence error of different translucent hair piece models during the translucent rendering process, and improve the accuracy of the rendering order of multiple translucent objects, thereby improving the Rendering of multiple translucent objects.

In a possible implementation, when the hair model is a hair model representing the roots of hair, the hair model further includes an opaque hair piece model, the opaque hair piece model and the plurality of translucent hair pieces The patch models are arranged in layers, and the opaque hair patch models are positioned close to the scalp.

In the embodiment of the present disclosure, the hair piece model near the scalp is an opaque hair piece model. In this way, the problem of rendering the scalp due to the transparency information of the color map can be avoided, and the authenticity of hair rendering can be increased.

In a possible implementation, the translucent hair piece model includes a front face close to the virtual camera and a back face away from the virtual camera, and the translucent hair piece model is made opaque by using the color map Rendering to obtain the first rendering result of the translucent hair piece model, including:

Opaque rendering is performed on the back of the translucent hair piece model by using the color map to obtain a first rendering result of the translucent hair piece model;

The translucent rendering of the translucent hair piece model by using the color map to obtain a second rendering result of the translucent hair piece model, including:

Translucent rendering is performed on the front surface of the translucent hair piece model by using the color map to obtain a second rendering result of the translucent hair piece model.

In the embodiment of the present disclosure, the backside of the translucent hair piece model is first rendered opaque by using the color map, and then the front side of the translucent hair piece model is rendered translucently. The position of the transparent hair piece model to reduce the occurrence of wrong rendering order.

In a possible implementation manner, performing opaque rendering on the back of the translucent hair piece model by using the color map to obtain a first rendering result of the translucent hair piece model, including:

Color rendering is performed on the back surface of the translucent hair piece model by using the color map to obtain the first rendering result.

In this embodiment of the present disclosure, the color map is used to render the back of the translucent hair piece model in color, so that the first rendering result can also include color information, which enhances the rendering effect of the back of the model. In addition, because the first rendering only performs color rendering, it can reduce the occurrence of resource waste caused by excessive unnecessary rendering.

In a possible implementation manner, performing translucent rendering on the front surface of the translucent hair piece model by using the color map to obtain a second rendering result of the translucent hair piece model, including:

Obtain the position information and light direction information of the translucent hair piece model;

Color rendering is performed on the front face of the translucent hair piece model by using the color map, and based on the light direction information and the position information of the translucent hair piece model, the front face of the translucent hair piece model is rendered in color. Shadow rendering to obtain the second rendering result.

In the embodiment of the present disclosure, by using a color map to perform color rendering and shadow rendering on the front of the translucent hair piece model, the second rendering result includes the color information and light and shadow information of the translucent hair piece model. The rendering effect is more realistic and natural.

In a possible implementation manner, the rendering images corresponding to the multiple translucent hair piece models are fused to obtain the rendered images corresponding to the hair model, including:

Based on the depth information of each translucent hair piece model relative to the virtual camera, the rendered images corresponding to the multiple translucent hair piece models respectively are fused to obtain a rendered image corresponding to the hair model.

In the embodiment of the present disclosure, according to the depth information of each translucent hair piece model relative to the virtual camera, a plurality of rendered images are fused to obtain a rendered image corresponding to the hair model. In this way, the difference between the multiple translucent hair piece models can be reduced. If the ordering between them is wrong, the image generated after rendering is closer to the real effect.

In a possible implementation manner, based on the depth information of each translucent hair piece model relative to the virtual camera, the rendered images respectively corresponding to the multiple translucent hair piece models are fused to obtain the Rendered images corresponding to the hair model, including:

Based on the depth information of each translucent hair piece model relative to the virtual camera, determining the fusion order of the rendered images corresponding to the plurality of translucent hair piece models respectively;

Based on the fusion sequence, the respective rendered images corresponding to the multiple translucent hair piece models are fused to obtain the rendered images corresponding to the hair models.

In the embodiment of the present disclosure, the fusion sequence of the multiple rendered images is determined according to the depth information of each semi-transparent slice-making model relative to the virtual camera, and then the multiple rendered images are fused according to the fusion sequence. The positional relationship between the translucent hair piece models determines the fusion order of multiple rendered images, so that the rendered images are closer to the real effect.

Embodiments of the present disclosure also provide a hair rendering device, including:

a model obtaining module, used for obtaining a hair model and a color map corresponding to the hair model; the hair model includes a plurality of translucent hair piece models arranged in layers, and each translucent hair piece model is based on a hair piece formed by a plurality of hairs Perform modeling and generation, the color map includes a plurality of color channels and a transparency channel, and the value of each pixel in the color map in the transparency channel is used to represent the transparency information of the pixel;

The first rendering module is configured to perform opaque rendering on the translucent hair chip model by using the color map for each of the translucent hair chip models, and obtain a first rendering result of the translucent hair chip model. The first rendering result includes depth information of the translucent hair piece model relative to the virtual camera;

a second rendering module, configured to perform translucent rendering on the translucent hair piece model by using the color map to obtain a second rendering result of the translucent hair piece model;

an image generation module, configured to obtain a rendered image corresponding to the translucent hair piece model based on the first rendering result and the second rendering result;

The image fusion module is used for fusing the rendered images corresponding to the multiple translucent hair piece models respectively to obtain the rendered images corresponding to the hair model.

In a possible implementation, when the hair model is a hair model representing the roots of hair, the hair model further includes an opaque hair piece model, the opaque hair piece model and the plurality of translucent hair pieces The patch models are arranged in layers, and the opaque hair patch models are positioned close to the scalp.

In a possible implementation manner, the translucent hair piece model includes a front face close to the virtual camera and a back face away from the virtual camera, and the first rendering module is specifically used for:

Opaque rendering is performed on the back of the translucent hair piece model by using the color map to obtain a first rendering result of the translucent hair piece model;

The second rendering module is specifically used for:

Translucent rendering is performed on the front surface of the translucent hair piece model by using the color map to obtain a second rendering result of the translucent hair piece model.

In a possible implementation manner, the first rendering module is specifically used for:

Color rendering is performed on the back surface of the translucent hair piece model by using the color map to obtain the first rendering result.

In a possible implementation manner, the second rendering module is specifically used for:

Obtain the position information and light direction information of the translucent hair piece model;

Color rendering is performed on the front face of the translucent hair piece model by using the color map, and based on the light direction information and the position information of the translucent hair piece model, the front face of the translucent hair piece model is rendered in color. Shadow rendering to obtain the second rendering result.

In a possible implementation manner, the image fusion module is specifically used for:

Based on the depth information of each translucent hair piece model relative to the virtual camera, the rendered images corresponding to the multiple translucent hair piece models respectively are fused to obtain a rendered image corresponding to the hair model.

In a possible implementation manner, the image fusion module is specifically used for:

Based on the depth information of each translucent hair piece model relative to the virtual camera, determining the fusion order of the rendered images corresponding to the plurality of translucent hair piece models respectively;

Based on the fusion sequence, the respective rendered images corresponding to the multiple translucent hair piece models are fused to obtain the rendered images corresponding to the hair models.

Embodiments of the present disclosure further provide an electronic device, including: a processor, a memory, and a bus, where the memory stores machine-readable instructions executable by the processor, and when the electronic device runs, the processor and the The memories communicate with each other through a bus, and when the machine-readable instructions are executed by the processor, the hair rendering method in any of the possible implementation manners described above is executed.

An embodiment of the present disclosure further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the hair rendering method in any of the foregoing possible embodiments is executed.

In order to make the above-mentioned objects, features and advantages of the present disclosure more obvious and easy to understand, the preferred embodiments are exemplified below, and are described in detail as follows in conjunction with the accompanying drawings.

Description of drawings

In order to explain the technical solutions of the embodiments of the present disclosure more clearly, the following briefly introduces the accompanying drawings required in the embodiments, which are incorporated into the specification and constitute a part of the specification. The drawings illustrate embodiments consistent with the present disclosure, and together with the description serve to explain the technical solutions of the present disclosure. It should be understood that the following drawings only show some embodiments of the present disclosure, and therefore should not be regarded as limiting the scope. Other related figures are obtained from these figures.

FIG. 1 shows a schematic diagram of a first rendering effect of multiple translucent objects provided by an embodiment of the present disclosure;

FIG. 2 shows a schematic diagram of a second rendering effect of multiple translucent objects provided by an embodiment of the present disclosure;

FIG. 3 shows a schematic diagram of a third rendering effect of multiple translucent objects provided by an embodiment of the present disclosure;

FIG. 4 shows a flowchart of a hair rendering method provided by an embodiment of the present disclosure;

FIG. 5 shows a schematic diagram of a hair model provided by an embodiment of the present disclosure;

FIG. 6 shows a schematic side view of a plurality of hair piece models located at the same position provided by an embodiment of the present disclosure;

FIG. 7 shows a schematic diagram of a result of opaque rendering of a translucent hair piece model provided by an embodiment of the present disclosure;

FIG. 8 shows a schematic diagram of a result of translucent rendering of a translucent hair piece model provided by an embodiment of the present disclosure;

FIG. 9 shows a flowchart of another hair rendering method provided by an embodiment of the present disclosure;

FIG. 10 shows a flowchart of a method for translucent rendering of the front surface of a translucent hairpiece model provided by an embodiment of the present disclosure;

FIG. 11 shows a schematic structural diagram of a hair rendering apparatus provided by an embodiment of the present disclosure;

FIG. 12 shows a schematic structural diagram of an electronic device provided by an embodiment of the present disclosure.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present disclosure more clear, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only These are some, but not all, embodiments of the present disclosure. The components of the disclosed embodiments generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the disclosure provided in the accompanying drawings is not intended to limit the scope of the disclosure as claimed, but is merely representative of selected embodiments of the disclosure. Based on the embodiments of the present disclosure, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present disclosure.

It should be noted that like numerals and letters refer to like items in the following figures, so once an item is defined in one figure, it does not require further definition and explanation in subsequent figures.

The term "and/or" in this paper only describes an association relationship, which means that there can be three kinds of relationships, for example, A and/or B, which can mean: the existence of A alone, the existence of A and B at the same time, the existence of B alone. a situation. In addition, the term "at least one" herein refers to any combination of any one of the plurality or at least two of the plurality, for example, including at least one of A, B, and C, and may mean including from A, B, and C. Any one or more elements selected from the set of B and C.

Since the hair model of the hyperrealistic character (hereinafter referred to as the digital human) includes multiple translucent models, in the process of rendering the multiple translucent models, the colors of the multiple translucent models need to be mixed. Depth values can be written. However, if the depth value is not written, the positional relationship between the multiple translucent models cannot be determined, so that the rendering sequence is prone to error, resulting in erroneous rendering results.

In the related art, a situation in which a rendering effect is wrong due to a wrong rendering order for multiple translucent objects is described in detail below.

Referring to FIG. 1 , the schematic diagram includes a translucent model 1 , a translucent model 2 and a translucent model 3 . Among them, translucent model 1 is placed with translucent model 2 and translucent model 3, that is, under normal circumstances, no matter from any angle, the translucent model 1 should be displayed in translucent model 2 and translucent model 3. The positional relationship in front of Model 3.

However, in the process of rendering multiple translucent models in the related art, the positional relationship of the translucent model 1, the translucent model 2 and the translucent model 3 is not determined. Therefore, if the shooting angle of the virtual camera is adjusted, then It happens that the translucent model 2 is located in front of the translucent model 1 (the picture effect shown in Figure 2), or the translucent model 3 is located in front of the translucent model 1 (the picture effect shown in Figure 3). But in fact, the spatial positions of the translucent model 2 and the translucent model 3 have not changed, but the final rendered picture effect is wrong because of the wrong rendering order.

In response to the above problems, an embodiment of the present disclosure provides a hair rendering method, including: acquiring a hair model and a color map corresponding to the hair model; the hair model includes a plurality of stacked translucent hair piece models, each half The transparent hair piece model is modeled and generated according to the hair piece formed by multiple hairs. The color map includes a plurality of color channels and a transparency channel. The value of each pixel in the color map in the transparency channel is used to represent the color map. Transparency information of the pixel point; for each translucent hair piece model, use the color map to perform opaque rendering on the translucent hair piece model to obtain the first rendering result of the translucent hair piece model, the The first rendering result includes depth information of the translucent hair piece model relative to the virtual camera; translucent rendering is performed on the translucent hair piece model by using the color map to obtain a second rendering of the translucent hair piece model result; based on the first rendering result and the second rendering result, a rendered image corresponding to the translucent hair piece model is obtained; the rendered images corresponding to the multiple translucent hair piece models are fused to obtain the The rendered image corresponding to the hair model described above.

In the embodiment of the present disclosure, when the hair model includes a plurality of translucent hair piece models arranged in layers, opaque rendering is first performed on each translucent hair piece model, and then translucent rendering is performed on each translucent hair piece The rendered image corresponding to each translucent hair piece model is obtained, and then the rendered images corresponding to the multiple translucent hair piece models are fused to obtain the rendered image corresponding to the hair model. In this way, each translucent can be obtained by opaque rendering. The depth information of the hair piece model relative to the virtual camera can reduce the rendering sequence error of different translucent hair piece models during the translucent rendering process, and improve the accuracy of the rendering order of multiple translucent objects, thereby improving the Rendering of multiple translucent objects.

The executive body of the hair rendering method provided by the embodiments of the present disclosure is generally an electronic device with a certain computing capability. , mobile devices, user terminals, terminals, handheld devices, computing devices, vehicle-mounted devices, etc. The server can be an independent physical server, a server cluster or a distributed system composed of multiple physical servers, or a basic cloud computing that provides cloud services, cloud databases, cloud computing, cloud storage, big data, and artificial intelligence platforms. service cloud server.

In some possible implementations, the hair rendering method may be implemented by a processor invoking computer-readable instructions stored in a memory.

In addition, the present disclosure aims to provide a rendering method, so the present disclosure does not limit the rendering software used in the specific execution process. The method described in the present disclosure can also be applied to different scenarios, such as offline rendering of digital human hair, real-time rendering of digital human hair on a mobile device, and the like.

Referring to FIG. 4, which is a flowchart of a hair rendering method provided by an embodiment of the present disclosure, the method includes steps S101-S105, wherein:

S101, obtaining a hair model and a color map corresponding to the hair model; the hair model includes a plurality of stacked translucent hair piece models, and each translucent hair piece model is modeled and generated according to hair pieces formed by multiple hairs , the color map includes a plurality of color channels and a transparency channel, and the value of each pixel in the color map in the transparency channel is used to represent the transparency information of the pixel.

Optionally, the hair model may run in a computer CPU (Central Processing Uni, central processing unit), GPU (Graphics Processing Unit, graphics processing unit) and memory, which contains meshed model information and texture information. Correspondingly, as an example, the translucent hair piece model and the opaque hair piece model include, but are not limited to, meshed model data and map texture data, or a combination thereof. The meshes include, but are not limited to, triangular meshes, quadrilateral meshes, other polygonal meshes, or combinations thereof. In the embodiment of the present disclosure, the mesh is a triangular mesh.

Exemplarily, the hair model includes a plurality of translucent hair piece models arranged in layers, and each translucent hair piece model is modeled and generated according to a hair piece formed by a plurality of hairs. Specifically, multiple hairs can be grouped into a group, each group of hairs can form a hair piece, and each hair piece is modeled to obtain a translucent hair piece model corresponding to each hair piece, so that there is no need to Modeling each hair separately reduces the number of models that need to be rendered during the rendering process. Correspondingly, each translucent hair piece model includes a plurality of vertices, and the plurality of vertices at different positions are connected to each other to form a face piece, thereby forming the surface of the hair model.

5 , which is a schematic diagram of a hair model provided by an embodiment of the present disclosure, the schematic diagram includes a plurality of hair piece models, and there are a plurality of hair pieces at positions A, B, and C respectively. Model, multiple hair piece models at the same position are stacked, so that the hairstyle of the entire hair can be represented, making the rendered hair more realistic.

The color map corresponding to the hair model is generated according to the translucent hair piece model, and the color map includes multiple color channels and transparency channels. The value of each pixel in the color map in the transparency channel is used to represent the value of the pixel. Transparency information. The value range of the transparency value corresponding to the translucent hair piece model can be [0, 255], or, [0, 1], the transparency value corresponding to the translucent hair piece model can determine the presentation of the degree of transparency of the translucent hair piece model Effect, the larger the transparency value corresponding to the translucent hair piece model, the more opaque the rendering effect of the translucent hair piece model appears.

Specifically, the multiple color channels in the color map are an R color channel, a G color channel, and a B color channel, respectively. Among them, the value of the R color channel is the value of the red channel of the pixel, the value of the G color channel is the value of the green channel of the pixel, and the value of the B color channel is the value of the blue channel of the pixel. The value range of the color value corresponding to the color channel can be [0, 255], or [0, 1]. The color value corresponding to the color channel can determine the rendering effect of the color of the translucent hair piece model. The color corresponding to the color channel The higher the value, the darker the color rendering of the translucent hair piece model.

In a possible implementation, when the hair model is a hair model representing the roots of hair, the hair model further includes an opaque hair piece model, the opaque hair piece model and the plurality of translucent hair pieces The patch models are arranged in layers, and the opaque hair patch models are positioned close to the scalp. For example, referring to Fig. 5 again, the innermost hair piece models at positions A and B are opaque hair piece models. In this way, the problem of rendering the scalp due to the transparency information of the color map can be avoided, and the authenticity of the hair rendering can be increased.

Exemplarily, referring to FIG. 6 , which is a schematic side view of a plurality of hair piece models located at the same position provided by an embodiment of the present disclosure, the schematic diagram includes a hair piece model 1 , a hair piece model 2 , and a hair piece model 2 located at the same position. Piece Model 3 and Hair Piece Model 4. The hair piece model 4 is an opaque hair piece model close to the scalp, and the hair piece model 1 , the hair piece model 2 and the hair piece model 3 are translucent hair piece models.

It should be noted that the hair model and the color map corresponding to the hair model can be pre-made and stored in the preset storage space. When the rendering task of the hair model needs to be performed, the hair model is read from the preset storage space. and the corresponding color map.

S102, for each translucent hair piece model, use the color map to perform opaque rendering on the translucent hair piece model, to obtain a first rendering result of the translucent hair piece model, the first rendering result Including depth information of the translucent hair piece model relative to the virtual camera.

Specifically, the translucent hair piece model can be rendered by a shader. Among them, the shader is used to render the model in the 3D image rendering process to obtain the rendered image. The shader includes a vertex shader and a pixel shader. The vertex shader is used to calculate the geometric relationship of the vertices of the model, and the pixel shader is used to calculate the color of the model.

Exemplarily, referring to FIG. 7 , which is a schematic diagram of a result of opaque rendering of a translucent hair piece model provided by an embodiment of the present disclosure, the coordinate value of the translucent hair piece model in the z-axis direction in the visual coordinate system can be used according to the coordinate value of the translucent hair piece model. The translucent hair piece model is rendered to obtain depth information of the translucent hair piece model relative to the virtual camera. The depth information is used to represent the position information of the translucent hair piece model, and the smaller the depth value corresponding to the translucent hair piece model, the closer the translucent hair piece model is to the virtual camera.

Among them, the virtual camera is a way of presenting a three-dimensional virtual world by controlling one or more lenses. Lens systems used in video games are designed to show action at the best angle; broadly speaking, these lenses are used in three-dimensional virtual worlds that require a third-person perspective. After finding a suitable lens, the orientation and rotation angle of the lens of the virtual camera can be obtained, and the related data can be used by a graphic engine renderer to generate a view.

S103, using the color map to perform translucent rendering on the translucent hair piece model, to obtain a second rendering result of the translucent hair piece model.

Among them, translucent rendering means that the model is transparently processed according to the intensity of the transparency information expressed on the color map, and the degree of transparency of the final rendering can be determined according to the intensity of the map drawing. In this embodiment, the hair tips, broken hairs and other parts are rendered by means of translucent rendering, so that the rendered hair model is closer to the real effect of human hair.

Optionally, in the process of translucent rendering of the translucent hair piece model by using the color map, there is a correspondence between the vertices of the translucent hair piece model and the pixels of the color map. In addition to determining the corresponding color, texture and other information of the vertices of the translucent hair piece model, the value of each pixel in the color map in the transparency channel is used to determine the transparency value corresponding to each vertex in the first model. Among them, the transparency value is used to indicate whether the position corresponding to the pixel is transparent. Therefore, through the transparency values corresponding to each pixel in the color map, the hair corresponding to the translucent hair piece model located in the inner layer can be transparent. It is rendered through the translucent hair piece model located in the outer layer, so as to achieve the rendering effect as shown in Figure 8.

S104, based on the first rendering result and the second rendering result, obtain a rendered image corresponding to the translucent hair piece model.

Exemplarily, after the first rendering result and the second rendering result are obtained, a rendered image corresponding to the translucent hair piece model may be obtained according to the first rendering result and the second rendering result. The rendered image may be captured by a virtual camera according to any angle, and the rendered image includes a plurality of hairs drawn in the color map.

It should be noted that since the first rendering adopts the opaque rendering method, and the second rendering adopts the single-layer translucent rendering method, the rendered image obtained through the first rendering result and the second rendering result There is no problem of incorrect sorting between multiple translucent models, which further improves the accuracy of rendering results.

S105 , fuse the respectively corresponding rendered images of the multiple translucent hair piece models to obtain the rendered images corresponding to the hair models.

After obtaining the rendered image corresponding to each translucent hair piece model in the hair model, it is necessary to fuse the respectively corresponding rendered images of the multiple translucent hair piece models to obtain the rendered image corresponding to the hair model.

Optionally, based on the depth information of each translucent hair piece model relative to the virtual camera, the rendered images corresponding to the plurality of translucent hair piece models may be fused to obtain the corresponding rendering images of the hair model. Render the image.

In this embodiment, since the depth information of the translucent hair piece model relative to the virtual camera is used to determine the position of the translucent hair piece model relative to the virtual camera, the depth information is used to fuse multiple rendered images, which can reduce The ordering of multiple translucent hair models was wrong, making the rendered image more realistic.

Specifically, based on the depth information of each translucent hair piece model relative to the virtual camera, determine the fusion order of the rendered images corresponding to the multiple translucent hair piece models respectively; The rendered images corresponding to the multiple translucent hair piece models are fused to obtain the rendered images corresponding to the hair model.

Among them, the rendered image corresponding to each translucent hair piece model is composed of many pixels. When multiple rendered images are fused, the translucent hair piece model with a smaller depth value is closer to the virtual camera. That is, the translucent hair piece model with a smaller depth value is located at the front of the hair piece model, and the translucent hair piece model with a larger depth value is farther away from the virtual camera, that is, the translucent hair piece with a larger depth value. The model is located at the back end of the hairpiece model.

It should be noted that the fusion order of the rendered images corresponding to the multiple translucent hair piece models may be sorted according to the depth value from small to large, or may be sorted according to the depth value from large to small, which is not specifically limited. Exemplarily, if the fusion order is obtained by sorting the depth values from small to large, the fusion can start from the translucent hair piece model with a smaller depth value, that is, start fusion from the outermost layer of the hair model; The order is obtained by sorting the depth values from large to small, and the fusion can start from the translucent hair piece model with a larger depth value, that is, from the innermost layer of the hair model.

In the embodiment of the present disclosure, when the hair model includes a plurality of translucent hair piece models arranged in layers, opaque rendering is first performed on each translucent hair piece model, and then translucent rendering is performed on each translucent hair piece The rendered image corresponding to each translucent hair piece model is obtained, and then the rendered images corresponding to the multiple translucent hair piece models are fused to obtain the rendered image corresponding to the hair model. In this way, each translucent can be obtained by opaque rendering. The depth information of the hair piece model relative to the virtual camera can reduce the rendering sequence error of different translucent hair piece models during the translucent rendering process, and improve the accuracy of the rendering order of multiple translucent objects, thereby improving the Rendering of multiple translucent objects.

In a possible implementation, the translucent hair piece model includes a front face close to the virtual camera and a back face away from the virtual camera. Specifically, referring to FIG. 9 , another embodiment of the present disclosure provides another A flowchart of a hair rendering method, including S201 to S205:

S201, obtaining a hair model and a color map corresponding to the hair model; the hair model includes a plurality of translucent hair piece models arranged in layers, and each translucent hair piece model is modeled and generated according to hair pieces formed by a plurality of hairs , the color map includes a plurality of color channels and a transparency channel, and the value of each pixel in the color map in the transparency channel is used to represent the transparency information of the pixel.

This step is similar to step S101 in FIG. 4 and will not be repeated here.

S202, for each translucent hair piece model, use the color map to perform opaque rendering on the back of the translucent hair piece model, to obtain a first rendering result of the translucent hair piece model.

In this embodiment, the backside of the translucent hair piece model is rendered in an opaque rendering manner, and the depth information of the translucent hair piece model relative to the virtual camera can be obtained without affecting the final rendering effect, so as to Reduce the number of cases where the arrangement order between multiple models is wrong.

Specifically, color rendering is performed on the back surface of the translucent hair piece model by using the color map to obtain the picture effect as shown in FIG. 7 . In this way, the first rendering result can also include color information, which enhances the rendering effect of the back of the model. In addition, because the first rendering only performs color rendering, it can reduce the occurrence of resource waste caused by excessive unnecessary rendering.

S203, using the color map to perform translucent rendering on the front surface of the translucent hair piece model, to obtain a second rendering result of the translucent hair piece model.

In this embodiment, the backside of the translucent hair piece model is first rendered opaque by using the color map, and then the front side of the translucent hair piece model is rendered by the translucent rendering method. In this way, the rendering effect is not affected. At the same time, determine the position of the translucent hair piece model to reduce the error of rendering order.

Specifically, referring to FIG. 10 , a flowchart of a method for translucent rendering of the front surface of a translucent hair piece model provided by an embodiment of the present disclosure includes S2031 to S2032 :

S2031: Acquire position information and light direction information of the translucent hair piece model.

The position information of the translucent hair piece model refers to the position information of the translucent hair piece model relative to the simulated light source. The light direction information refers to the direction when the simulated light source illuminates the translucent hair piece model.

S2032, using the color map to perform color rendering on the front surface of the translucent hair piece model, and based on the light direction information and the position information of the translucent hair piece model, perform color rendering on the translucent hair piece model. Shadow rendering is performed on the front side to obtain the second rendering result.

Among them, shadow rendering is to simulate the degree of light and shade produced by the illumination of the light source on the model, and use grayscale tone or color output to obtain a tone that changes approximately continuously with the luminosity, so as to achieve the sensitive contrast of different positions of the model, so that the model has a certain three-dimensional sense. Visually express changes in different positions of the model.

In this embodiment, by performing color rendering on the front of the translucent hair piece model, the color information of the translucent hair piece model can be obtained. By performing shadow rendering on the front of the translucent hair piece model, the color information of the translucent hair piece model can be obtained. Light and shadow information, according to the color information and light and shadow information of the translucent hair piece model, can make the rendering effect of the hair more realistic and natural.

S204, based on the first rendering result and the second rendering result, obtain a rendered image corresponding to the translucent hair piece model.

This step is similar to step S104 in FIG. 4 and will not be repeated here.

S205 , fuse the respectively corresponding rendered images of the multiple translucent hair piece models to obtain the rendered images corresponding to the hair models.

This step is similar to step S105 in FIG. 4 and will not be repeated here.

Those skilled in the art can understand that in the above method of the specific implementation, the writing order of each step does not mean a strict execution order but constitutes any limitation on the implementation process, and the specific execution order of each step should be based on its function and possible Internal logic is determined.

Based on the same inventive concept, the embodiments of the present disclosure also provide a hair rendering device corresponding to the hair rendering method. Reference may be made to the implementation of the method, and repeated descriptions will not be repeated.

Referring to FIG. 11 , which is a schematic structural diagram of a hair rendering apparatus according to an embodiment of the present disclosure, the apparatus 1100 includes:

The model obtaining module 1101 is used to obtain a hair model and a color map corresponding to the hair model; the hair model includes a plurality of translucent hair piece models arranged in layers, and each translucent hair piece model is formed according to a plurality of hairs. The color map includes a plurality of color channels and a transparency channel, and the value of each pixel in the color map in the transparency channel is used to represent the transparency information of the pixel;

A first rendering module 1102, configured to perform opaque rendering on the translucent hair piece model by using the color map for each of the translucent hair piece models, to obtain a first rendering result of the translucent hair piece model, The first rendering result includes depth information of the translucent hair piece model relative to the virtual camera;

A second rendering module 1103, configured to perform translucent rendering on the translucent hair piece model by using the color map, to obtain a second rendering result of the translucent hair piece model;

An image generation module 1104, configured to obtain a rendered image corresponding to the translucent hair piece model based on the first rendering result and the second rendering result;

The image fusion module 1105 is configured to fuse the respectively corresponding rendered images of the multiple translucent hair piece models to obtain the rendered images corresponding to the hair models.

In a possible implementation, when the hair model is a hair model representing the roots of hair, the hair model further includes an opaque hair piece model, the opaque hair piece model and the plurality of translucent hair pieces The patch models are arranged in layers, and the opaque hair patch models are positioned close to the scalp.

In a possible implementation manner, the translucent hair piece model includes a front face close to the virtual camera and a back face away from the virtual camera, and the first rendering module 1102 is specifically configured to:

Opaque rendering is performed on the back of the translucent hair piece model by using the color map to obtain a first rendering result of the translucent hair piece model;

The second rendering module 1103 is specifically used for:

Translucent rendering is performed on the front surface of the translucent hair piece model by using the color map to obtain a second rendering result of the translucent hair piece model.

In a possible implementation manner, the first rendering module 1102 is specifically used for:

Color rendering is performed on the back surface of the translucent hair piece model by using the color map to obtain the first rendering result.

In a possible implementation manner, the second rendering module 1103 is specifically used for:

Obtain the position information and light direction information of the translucent hair piece model;

Color rendering is performed on the front face of the translucent hair piece model by using the color map, and based on the light direction information and the position information of the translucent hair piece model, the front face of the translucent hair piece model is rendered in color. Shadow rendering to obtain the second rendering result.

In a possible implementation manner, the image fusion module 1105 is specifically used for:

Based on the depth information of each translucent hair piece model relative to the virtual camera, the rendered images corresponding to the multiple translucent hair piece models respectively are fused to obtain a rendered image corresponding to the hair model.

In a possible implementation manner, the image fusion module 1105 is specifically used for:

Based on the depth information of each translucent hair piece model relative to the virtual camera, determining the fusion order of the rendered images corresponding to the plurality of translucent hair piece models respectively;

Based on the fusion sequence, the respective rendered images corresponding to the multiple translucent hair piece models are fused to obtain the rendered images corresponding to the hair models.

Based on the same technical concept, the embodiments of the present application also provide an electronic device. Referring to FIG. 12 , a schematic structural diagram of an electronic device 1200 provided by an embodiment of the present application includes a processor 1201 , a memory 1202 , and a bus 1203 . Among them, the memory 1202 is used to store the execution instructions, including the memory 12021 and the external memory 12022; the memory 12021 here is also called the internal memory, which is used to temporarily store the operation data in the processor 1201 and the data exchanged with the external memory 12022 such as the hard disk, The processor 1201 exchanges data with the external memory 12022 through the memory 2021 .

In this embodiment of the present application, the memory 1202 is specifically used to store the application program code for executing the solution of the present application, and the execution is controlled by the processor 1201 . That is, when the electronic device 1200 is running, the processor 1201 communicates with the memory 1202 through the bus 1203, so that the processor 1201 executes the application code stored in the memory 1202, thereby executing the method disclosed in any of the foregoing embodiments.

The memory 1202 may be, but not limited to, a random access memory (Random Access Memory, RAM), a read only memory (Read Only Memory, ROM), a programmable read only memory (Programmable Read-Only Memory, PROM), or Erasable Programmable Read-Only Memory (EPROM), Electrical Erasable Programmable Read-Only Memory (EEPROM), etc.

The processor 1201 may be an integrated circuit chip with signal processing capability. The above-mentioned processor may be a general-purpose processor, including a central processing unit (Central Processing Unit, CPU), a network processor (Network Processor, NP), etc.; it may also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), Field Programmable Gate Array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components. Various methods, steps, and logical block diagrams disclosed in the embodiments of the present invention can be implemented or executed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

It can be understood that the structures illustrated in the embodiments of the present application do not constitute a specific limitation on the electronic device 1200 . In other embodiments of the present application, the electronic device 1200 may include more or less components than shown, or combine some components, or separate some components, or arrange different components. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

Embodiments of the present disclosure further provide a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is run by a processor, the steps of the hair rendering method described in the foregoing method embodiments are executed. . Wherein, the storage medium may be a volatile or non-volatile computer-readable storage medium.

A computer program product provided by the embodiments of the present disclosure includes a computer-readable storage medium storing program codes, and the instructions included in the program codes can be used to execute the steps of a hair rendering method in the above method embodiments, specifically Reference may be made to the foregoing method embodiments, and details are not described herein again.

Wherein, the above-mentioned computer program product can be specifically implemented by means of hardware, software or a combination thereof. In an optional embodiment, the computer program product is embodied as a computer storage medium, and in another optional embodiment, the computer program product is embodied as a software product, such as a software development kit (Software Development Kit, SDK), etc. Wait.

Those skilled in the art can clearly understand that, for the convenience and brevity of description, for the specific working process of the system and device described above, reference may be made to the corresponding process in the foregoing method embodiments, which will not be repeated here. In the several embodiments provided by the present disclosure, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. The apparatus embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented. On the other hand, the shown or discussed mutual coupling or direct coupling or communication connection may be through some communication interfaces, indirect coupling or communication connection of devices or units, which may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.

In addition, each functional unit in each embodiment of the present disclosure may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a processor-executable non-volatile computer-readable storage medium. Based on such understanding, the technical solutions of the present disclosure can be embodied in the form of software products in essence, or the parts that contribute to the prior art or the parts of the technical solutions. The computer software products are stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of the present disclosure. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program codes.

Finally, it should be noted that the above-mentioned embodiments are only specific implementations of the present disclosure, and are used to illustrate the technical solutions of the present disclosure rather than limit them. The protection scope of the present disclosure is not limited thereto, although referring to the foregoing The embodiments describe the present disclosure in detail. Those of ordinary skill in the art should understand that: any person skilled in the art can still modify the technical solutions described in the foregoing embodiments within the technical scope disclosed by the present disclosure. Changes can be easily thought of, or equivalent replacements are made to some of the technical features; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present disclosure, and should be covered in the present disclosure. within the scope of protection. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims (10)

1. a hair rendering method, is characterized in that, comprises: Obtain a hair model and a color map corresponding to the hair model; the hair model includes a plurality of translucent hair piece models arranged in layers, and each translucent hair piece model is modeled and generated according to the hair pieces formed by a plurality of hairs. The color map includes a plurality of color channels and a transparency channel, and the value of each pixel in the color map in the transparency channel is used to represent the transparency information of the pixel; For each translucent hair piece model, use the color map to perform opaque rendering on the translucent hair piece model, to obtain a first rendering result of the translucent hair piece model, where the first rendering result includes all The depth information of the translucent hair piece model relative to the virtual camera; Perform translucent rendering on the translucent hair piece model by using the color map to obtain a second rendering result of the translucent hair piece model; obtaining a rendered image corresponding to the translucent hair piece model based on the first rendering result and the second rendering result; The rendered images corresponding to the multiple translucent hair piece models are fused to obtain the rendered images corresponding to the hair model. 2 . The method according to claim 1 , wherein, in the case that the hair model is a hair model representing the root of the hair, the hair model further comprises an opaque hair piece model, the opaque hair piece model being the same as the hair model. 3 . The plurality of translucent hair piece models are stacked and arranged, and the opaque hair piece models are close to the scalp. 3. The method according to claim 1 or 2, wherein the translucent hair piece model includes a front face close to the virtual camera and a back face far from the virtual camera, and the color map is used to adjust the The translucent hair piece model is rendered opaque, and the first rendering result of the translucent hair piece model is obtained, including: Opaque rendering is performed on the back of the translucent hair piece model by using the color map to obtain a first rendering result of the translucent hair piece model; The translucent rendering of the translucent hair piece model by using the color map to obtain a second rendering result of the translucent hair piece model, including: Translucent rendering is performed on the front surface of the translucent hair piece model by using the color map to obtain a second rendering result of the translucent hair piece model. 4 . The method according to claim 3 , wherein the opaque rendering of the back surface of the translucent hair piece model by using the color map is performed to obtain a first rendering result of the translucent hair piece model, 4 . include: Color rendering is performed on the back surface of the translucent hair piece model by using the color map to obtain the first rendering result. 5. The method according to claim 3 or 4, wherein the translucent rendering is performed on the front surface of the translucent hair piece model by using the color map to obtain the second half of the translucent hair piece model. Rendering results, including: Obtain the position information and light direction information of the translucent hair piece model; Color rendering is performed on the front face of the translucent hair piece model by using the color map, and based on the light direction information and the position information of the translucent hair piece model, the front face of the translucent hair piece model is rendered in color. Shadow rendering to obtain the second rendering result. 6. The method according to any one of claims 1-5, wherein the rendering images corresponding to the multiple translucent hair piece models are fused to obtain the rendered images corresponding to the hair models, comprising: : Based on the depth information of each translucent hair piece model relative to the virtual camera, the rendered images corresponding to the multiple translucent hair piece models respectively are fused to obtain a rendered image corresponding to the hair model. 7 . The method according to claim 6 , wherein, based on the depth information of each translucent hair piece model relative to the virtual camera, the rendered images corresponding to the plurality of translucent hair piece models respectively are obtained. 8 . Perform fusion to obtain the rendered image corresponding to the hair model, including: Based on the depth information of each translucent hair piece model relative to the virtual camera, determining the fusion order of the rendered images corresponding to the plurality of translucent hair piece models respectively; Based on the fusion sequence, the respective rendered images corresponding to the multiple translucent hair piece models are fused to obtain the rendered images corresponding to the hair models. 8. A hair rendering device, comprising: a model obtaining module, used for obtaining a hair model and a color map corresponding to the hair model; the hair model includes a plurality of translucent hair piece models arranged in layers, and each translucent hair piece model is based on a hair piece formed by a plurality of hairs Perform modeling and generation, the color map includes a plurality of color channels and a transparency channel, and the value of each pixel in the color map in the transparency channel is used to represent the transparency information of the pixel; The first rendering module is configured to perform opaque rendering on the translucent hair chip model by using the color map for each of the translucent hair chip models, and obtain a first rendering result of the translucent hair chip model. The first rendering result includes depth information of the translucent hair piece model relative to the virtual camera; a second rendering module, configured to perform translucent rendering on the translucent hair piece model by using the color map to obtain a second rendering result of the translucent hair piece model; an image generation module, configured to obtain a rendered image corresponding to the translucent hair piece model based on the first rendering result and the second rendering result; The image fusion module is used for fusing the rendered images corresponding to the multiple translucent hair piece models respectively to obtain the rendered images corresponding to the hair model. 9. An electronic device, comprising: a processor, a memory, and a bus, wherein the memory stores machine-readable instructions executable by the processor, and when the electronic device is running, the processor and the The memories communicate with each other through a bus, and when the machine-readable instructions are executed by the processor, the hair rendering method according to any one of claims 1 to 7 is executed. 10. A computer-readable storage medium, wherein a computer program is stored on the computer-readable storage medium, and when the computer program is run by a processor, the hair rendering method according to any one of claims 1 to 7 is executed .

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