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US20070070067A1 - Scene splitting for perspective presentations - Google Patents

Scene splitting for perspective presentations Download PDF

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Publication number
US20070070067A1
US20070070067A1 US11/412,410 US41241006A US2007070067A1 US 20070070067 A1 US20070070067 A1 US 20070070067A1 US 41241006 A US41241006 A US 41241006A US 2007070067 A1 US2007070067 A1 US 2007070067A1
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US
United States
Prior art keywords
sub
scene
rendering
images
steps
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US11/412,410
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English (en)
Inventor
Thomas Ruge
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nvidia Corp
Original Assignee
ModViz Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ModViz Inc filed Critical ModViz Inc
Priority to US11/412,410 priority Critical patent/US20070070067A1/en
Publication of US20070070067A1 publication Critical patent/US20070070067A1/en
Assigned to NVIDIA CORPORATION reassignment NVIDIA CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MODVIZ, INC.
Abandoned legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T15/00—3D [Three Dimensional] image rendering
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T15/00—3D [Three Dimensional] image rendering
    • G06T15/005—General purpose rendering architectures
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T9/00—Image coding
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2200/00—Indexing scheme for image data processing or generation, in general
    • G06T2200/16—Indexing scheme for image data processing or generation, in general involving adaptation to the client's capabilities
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2210/00—Indexing scheme for image generation or computer graphics
    • G06T2210/52—Parallel processing
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2340/00—Aspects of display data processing
    • G09G2340/10—Mixing of images, i.e. displayed pixel being the result of an operation, e.g. adding, on the corresponding input pixels
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2340/00—Aspects of display data processing
    • G09G2340/12—Overlay of images, i.e. displayed pixel being the result of switching between the corresponding input pixels
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/06—Use of more than one graphics processor to process data before displaying to one or more screens
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/36—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the display of a graphic pattern, e.g. using an all-points-addressable [APA] memory
    • G09G5/363—Graphics controllers

Definitions

  • the invention relates to scene splitting for perspective presentations.
  • Known solutions include breaking up computing the scene into parts, and assigning each of those parts to a separate graphics processor.
  • These separate graphics processors each operate under control of a single controlling processor, which determines how to break up computing the scene into parts.
  • the controlling processor sends each separate graphics processor a set of commands telling the receiver what to render.
  • Each graphics processor generates data showing how to render its part of the scene. This data might be sent back to the controlling processor for presentation, or might be sent on to a presenting device, such as a graphics compositor, a monitor, or a set of monitors.
  • One drawback is that it might still take substantial resources to compose a single image for the presentation device, from the distinct sub-images generated by multiple graphics processors. For example, if one of the graphics processors is assigned objects to render that are “behind” others, as seen from a selected viewpoint, rendering the 2D (2-dimensional) image for display might involve substantial resources, including such effects as occlusion and partial occlusion, transparency, and reflection.
  • Some known systems distribute the 3D (3-dimensional) scene for rendering in a relatively simple manner, such as slices of the 3D scene to be rendered, and include specialized hardware as a graphics compositor. These systems include the HP “Sepia” product and the Orad “DVG” product. However, specialized hardware can be quite expensive, and is in general not very suitable for flexible configuration of the system.
  • the invention provides techniques, embodied in methods and systems, including scene splitting for perspective presentations.
  • a system embodying the invention includes a controlling device and a set of rendering devices, with the effect that the controlling device can distribute a set of objects to be rendered to the rendering devices.
  • the controlling device splits up the 3D scene to be rendered into a set of 3D sub-scenes, each of which is relatively smaller than the original 3D scene.
  • Each rendering device determines a 2D image in response to the 3D sub-scene assigned to it, and in response to a rendering viewpoint.
  • elements of a 3D scene are included within an enclosing volume, such as a cube, and a set of 3D sub-scenes are each included within an enclosing sub-volume, such as a smaller cube (i.e., a “cubelet”) proportional to the entire scene's larger enclosing cube.
  • Each rendering device determines a 3D rendering of the elements in its sub-volume, as seen from that rendering viewpoint.
  • Each rendering device also determines a 2D image of the 3D rendering, as seen from that rendering viewpoint.
  • Each rendering device sends the 2D image it determines to a compositor, which combines that 2D image with the 2D images from rendering devices in “front” of it with respect to the rendering viewpoint.
  • the 2D images might be sent for composition in one of several ways, such as one of (a) directly to the controlling device, (b) in a multi-tier hierarchy, such as one determined by the controlling device in response to the rendering viewpoint, (c) a switch coupling rendering devices in response to the rendering viewpoint.
  • a result of compositing the 2D images should be suitable for sending to a presentation device.
  • the invention might be used to provide one or more of, or some combination or extension of, any of the following.
  • FIG. 1 shows a block diagram of a system including a controlling device and a set of rendering devices.
  • FIG. 2 shows a process flow diagram of a method of using a system including a controlling device and a set of rendering devices.
  • FIG. 1 shows a block diagram of a system including a controlling device and a set of rendering devices.
  • a system 100 includes elements as shown in FIG. 1 , plus possibly other elements as described in the incorporated disclosure. These elements include at least a controlling device 110 , a set of rendering devices 120 , a (conceptual—not shown but understood by those skilled in the art) encompassing volume 130 , and a (conceptual—not shown but understood by those skilled in the art) 2D image 140 capable of presentation.
  • the controlling device 110 includes elements as shown in FIG. 1 , plus possibly other elements as described in the incorporated disclosure. These elements include at least a model or database 111 , a communication network 112 , and a set of rendering commands 113 .
  • the rendering devices 120 each include elements as shown in FIG. 1 , plus possibly other elements as described in the incorporated disclosure. These elements include, for each rendering device 120 , at least an input port 121 , a processor and memory 122 , and an output port 123 .
  • the encompassing volume 130 includes elements as shown in FIG. 1 , plus possibly other elements as described in the incorporated disclosure. These elements include at least the following:
  • the 2D image 140 includes an image responsive to the 3D scene 131 and the rendering viewpoint 132 .
  • the 2D image 140 is responsive to at least the following:
  • each rendering device 120 allocated rendering commands for its sub-volume 133 , need only compute the 2D sub-image 141 for its own sub-volume 133 , responsive to the rendering viewpoint 132 . This has the effect of generating a 2D sub-image 141 for each such sub-volume 133 .
  • each of the 2D sub-images 141 need only encompass those three faces (for a cubelet) of the sub-volume 142 viewable from the rendering viewpoint 132 .
  • That 2D sub-image 141 has a size proportional to O(1/n 2 ), where n is a number of rendering devices 120 on a side of a cubic arrangement thereof.
  • the system 100 also optionally includes a compositing device 150 .
  • the compositing device 150 includes elements as shown in FIG. 1 , plus possibly other elements as described in the incorporated disclosure. These elements include at least an input port 151 , a compositing element 152 , and an output port 153 .
  • the input port 151 is coupled to the 2D sub-images 141 , and to the back-to-front partial ordering 142 .
  • the compositing element 152 is coupled to the input port 151 , and generates the 2D image 140 (as represented by data in memory, storage, or a signal).
  • the output port 153 is coupled to the 2D image 140 .
  • the system 100 also optionally includes a presentation device 160 .
  • the presentation device 160 is coupled to the 2D image 140 (as represented by data in memory, storage, or a signal), and is capable of presenting that 2D image 140 to a user 170 .
  • the user 170 is shown herein as a person, in the context of the invention, there is no particular requirement that the user 170 is so limited.
  • the user 170 might include a group of people, a computer imaging or motion detection program, an image compression program such as JPEG or MPEG, a system including a broadcast or other distribution system for images, an analysis program for 2D image 140 , or even an artificial intelligence program capable of reviewing the 2D image 140 .
  • FIG. 2 shows a process flow diagram of a method of using a system including a controlling device and a set of rendering devices.
  • the method 200 includes flow points and process steps as shown in FIG. 2 , plus possibly other flow points and process steps as described in the incorporated disclosure. These flow points and process steps include at least the following:
  • the system 100 uses “Sub-Volumes” to split the 3D scene. These sub-volumes are initially defined by a configuration file (see a sample configuration file be-low). A sub-volume as implemented by the system 100 is presented by a cube (defined in 3 dimensions by xmin, xmax, ymin, ymax, zmin, zmax). The content of each sub-volume is rendered by an individual rendering device 120 .
  • the splitting of the 3D-scene happens by assigning each object to at least one sub-volume.
  • the criteria that determines where to assign an individual 3D-object is the spatial overlap between the spatial representation of a 3D object (the “bounding box”) and all sub-volumes.
  • the 3D-object will be copied onto all rendering devices 120 that are assigned to the sub-volumes that overlap or enclose the “bounding box” of a 3D object. This algorithm makes sure that every rendering device 120 has a copy of at least all the 3D objects it has to render.
  • the parameter of a sub-volume can change dynamically if the controlling device 110 determines a more optimal sub-volume configuration. More optimal is defined by a better load balance of all rendering devices 120 . The optimum preferably includes all rendering device 120 needing the same time to render their individual part of a 3D-scene.
  • the change of the sub-volumes can be expensive (i.e. it takes a long time), because 3D-objects have to be transferred from one rendering device 120 to another.
  • the system 100 implements an optional way of giving a copy of all 3D-objects to all rendering devices 120 .
  • the system 100 can write 3D-objects on to a cheaper slower memory with higher capacity (e.g. a hard disk associated with a rendering device 120 ) of each rendering device 120 .

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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Graphics (AREA)
  • Human Computer Interaction (AREA)
  • General Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Processing Or Creating Images (AREA)
  • Image Generation (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)
  • Image Processing (AREA)
US11/412,410 2005-04-29 2006-04-26 Scene splitting for perspective presentations Abandoned US20070070067A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US11/412,410 US20070070067A1 (en) 2005-04-29 2006-04-26 Scene splitting for perspective presentations

Applications Claiming Priority (4)

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US67624005P 2005-04-29 2005-04-29
US67625405P 2005-04-29 2005-04-29
US67624105P 2005-04-29 2005-04-29
US11/412,410 US20070070067A1 (en) 2005-04-29 2006-04-26 Scene splitting for perspective presentations

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US11/412,410 Abandoned US20070070067A1 (en) 2005-04-29 2006-04-26 Scene splitting for perspective presentations
US11/412,413 Expired - Fee Related US7450129B2 (en) 2005-04-29 2006-04-26 Compression of streams of rendering commands
US11/412,406 Active 2027-06-30 US7978204B2 (en) 2005-04-29 2006-04-26 Transparency-conserving system, method and computer program product to generate and blend images

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US11/412,413 Expired - Fee Related US7450129B2 (en) 2005-04-29 2006-04-26 Compression of streams of rendering commands
US11/412,406 Active 2027-06-30 US7978204B2 (en) 2005-04-29 2006-04-26 Transparency-conserving system, method and computer program product to generate and blend images

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WO (3) WO2006119076A2 (fr)

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CN102572304A (zh) * 2011-12-13 2012-07-11 广东威创视讯科技股份有限公司 一种图像叠加处理方法及装置
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