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WO2012010117A1 - Procédé et dispositif de capture d'images tridimensionnelles pour différentes grandeurs d'affichage avec exploitation de tout le budget de profondeur respectif - Google Patents

Procédé et dispositif de capture d'images tridimensionnelles pour différentes grandeurs d'affichage avec exploitation de tout le budget de profondeur respectif Download PDF

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Publication number
WO2012010117A1
WO2012010117A1 PCT/DE2011/001221 DE2011001221W WO2012010117A1 WO 2012010117 A1 WO2012010117 A1 WO 2012010117A1 DE 2011001221 W DE2011001221 W DE 2011001221W WO 2012010117 A1 WO2012010117 A1 WO 2012010117A1
Authority
WO
WIPO (PCT)
Prior art keywords
cameras
camera
image
motors
parameters
Prior art date
Application number
PCT/DE2011/001221
Other languages
German (de)
English (en)
Inventor
Florian Maier
Original Assignee
Florian Maier
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 Florian Maier filed Critical Florian Maier
Priority to EP11767894.6A priority Critical patent/EP2614651A1/fr
Publication of WO2012010117A1 publication Critical patent/WO2012010117A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
    • H04N13/20—Image signal generators
    • H04N13/296—Synchronisation thereof; Control thereof
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
    • H04N13/20—Image signal generators
    • H04N13/204—Image signal generators using stereoscopic image cameras
    • H04N13/243—Image signal generators using stereoscopic image cameras using three or more 2D image sensors

Definitions

  • the invention relates to a method and a device for receiving
  • Three-dimensional image material for different display sizes each of which is the full depth budget using a variable basic distance between two cameras is exploited.
  • the method and the device is applicable to both the still, as well as the moving image recording.
  • Polarization methods shutter glasses techniques, autostereoscopic lenticular techniques, parallax barrier techniques, or similar plastic methods
  • Image representation are shown. This representation can be done on screens in cinema size but also on small monitors (eg 24 "size) All of these methods require at least two perspectively different views of an object These views are usually generated by at least two cameras in different, adjacent perspective (see Sand R, three-dimensional television, in DE-Z: television and cinema technology, 37, No. 8/1983, page 321 ff).
  • l can be, as the camera housings allow in a side-by-side structure, a special device is used in particular in the film sector, which merges the beam paths of at least two cameras via a semitransparent mirror so that the beam paths of both cameras can overlap, without the housings and / or lenses interfering with each other (see Lipton, Lenny: Foundations of the Stereoscopy Cinema: A Study in Depth, Van Nostrand Reinhold Company, 1982). Furthermore, it is also possible to arrange at least two cameras on at least two levels (see exemplary embodiment in DE 10 2005 042 413 B4). The resulting camera viewing angles also look in the same direction and the shots are taken from slightly different perspectives.
  • the last-mentioned size ie the display size (or in other words the screen size or the size of the screen) is a very important factor that decides which stereobase in the plastic image acquisition must be worked to the full depth dynamics (the Deep budget).
  • this stereo basis can no longer be changed or only with severe quality losses (by calculating a virtual camera position), which is unreasonable, especially in the high-quality range, or can only be achieved with a great deal of effort and loss of detail.
  • plastic image reproduction it makes a big difference whether, e.g.
  • the invention is therefore based on the object to produce three-dimensional image material that is able to exploit the respective entire depth budget at the same time for several presentation sizes with little effort.
  • the invention proposes a method and a device which records the scene to be recorded with at least two stereo bases with at least three cameras on a common camera holding device. All cameras look the same
  • the optical axes can either be converging on an object or parallel. In order to be able to record three-dimensional images simultaneously for different display sizes, you must simultaneously use
  • the invention proposes to use at least one camera together for both display sizes. This will be explained in the following example in an embodiment with three cameras:
  • the parallax is calculated at a certain value x (eg in mm) due to the parameters to be included in the calculation (such as the focal length or the distances in the recording room) for a given display size (in this case the 10 meter wide screen), two of the three cameras positioned at a distance x.
  • the image streams that are generated and recorded by these cameras will later be used again to record this presentation size.
  • a camera from the Camerachenchen can be used for the 10 meter screen, together with a new camera (the third in total), which has 2x the distance to the first camera (see Figure 1 - an example of a side-by-side structure).
  • a new camera the third in total
  • the material cost can be limited, but also to ensure that the viewing angle and thus the image of the image largely (so at least this is a common camera regarding) is maintained.
  • the stereo base depending on parameters (such as focal length or distances to relevant points in the recording room) adjusted and thus (on-air or off-air) must be changed, so it is also provided here To make stereo bases changeable. Since the representation size as a factor in the
  • stereo base 1 Called stereo base 1 to the other stereo base (eg for the display size 2 hereinafter referred to as stereo base 2 for simplicity).
  • stereo base 2 will change to half in sync (this would be x).
  • the stereo base has to be doubled, the stereo base 1 changes to the value 2x and the stereo base 2 to the value 4x.
  • the stereobases thus differ from one another by a certain factor, which in principle always remains the same (only for reasons of design can this be changed slightly from scene to scene or be adjusted; This is the case, for example, if the movie screen permits greater depth variations depending on the scene than a small screen or vice versa).
  • three different display variables can also be covered with a three-camera setup.
  • the lowest stereo base xl camera Kl and K3 can be used, for a medium stereo base x2 camera K3 and K2 and for a large stereo base x3 camera Kl and K2.
  • the distances of the cameras are thus selected in a certain ratio and synchronously in
  • Camera bundle can be transmitted, for which one of the two for the
  • Base pitch used cameras can be used twice.
  • These cameras record the image signals synchronously and simultaneously, and when playing, depending on the screen size or type (multi-view screens) at least two
  • Image streams from the recorded image streams are selected simultaneously.
  • all three image streams may then be combined into a single data file, in which case (possibly automatically) it can be decided by the playback medium which presentation size is currently available. In this case, only the image stream pair would be selected for display, which fits best to the respective presentation size.
  • This function could be integrated eg with Blu-ray discs, whereby the playback device (or the user) decides on the basis of a communication with the screen (here the screen size is transmitted to the player) which image stream pair is most suitable for the connected screen User preference is.
  • the same setting of the camera parameters in all cameras and lenses is useful; below that is the same focal length, the same focus, the same camera parameters (where appropriate), etc. to understand.
  • the image material is simultaneously recorded in such a way that suitable image stream pairs can be picked out for the desired presentation size for playback. It may be useful to record at different frame rates, resolutions, or exposures (e.g., with different frame rate, one for the cinema (24p) one for 3 D-TV (e.g., 50i)). Again this is suggested as possible.
  • the cameras can either all be arranged on a line or curve (side-by-side structure) or merged via at least one semitransparent mirror on at least two levels to form a plane.
  • a possible embodiment with at least three levels can be found in patent DE 10 2005 042 413 B4. This has three camera levels and two semi-transparent mirrors. This would allow all three cameras to be driven on a zero-stereo basis, resulting in calibration advantages and freedom of design for small stereo bases.
  • the selection of the basic distance can be made manually via corresponding user interfaces or automatically (with the help of image analysis or distance measurement). In the process, data from used components can be read out for storage, saved and, if necessary, recalled immediately (eg lens parameters, such as the current focal length).
  • the calibration of the cameras can also be done manually or by motor control. In the case of calibration, as shown in FIG. 3, the first camera (camera 1) can be switched to the middle one Camera (camera 3) - here at stereo base 1 zero - and then the last camera (camera 2) in turn the middle camera (camera 3) - then also with stereo base 2 zero) are aligned. This ensures that all three cameras have the same calibration (in this case, all three optical axes are parallel).
  • the synchronous adjustment of the camera in a certain factor can in the mechanical case on spindles with different pitch or via a transmission, with the
  • the invention provides a weight balance in the way that at least two cameras can be moved to guides in the opposite direction from the focus of the apparatus out.
  • the synchronous movement on either side may be by a mechanical coupling (e.g., a belt drive with or without translation and with or without a motor drive), or by at least two synchronized motors simultaneously moving the carriages, for example via spindles
  • the device may provide an adjustment for adjusting the distance of the camera from the semitransparent mirror.
  • At least one camera including any Versteilvorraumen for calibration is mounted on a carriage (either with the help of a guide, eg ball bearings, or as a sliding positive connection, eg dovetail), which is set in the direction of the mirror in the distance and possibly clamped in one position or can be braked.
  • a guide eg ball bearings
  • a sliding positive connection eg dovetail
  • Removal can be done manually or via motors.
  • a manual but also a motor control can be used.
  • the control of the motors can be done by a computer unit, the distance by stored in advance or live at runtime the
  • Calibration of the lenses by an analysis of the or two or more video image / images ensures (with a correction of height errors, rotation errors, tilt errors, mirror distance, etc.).
  • the mounted on the guide camera slide from the with the spindle or motor
  • a motorized retraction of the camera slide the respective calibrated position can be stored in a computer unit, the carriage are moved away from the mirror at the touch of a button and be approached after the lens has been changed or cleaned the front lens.
  • a counter-spring which can be adapted to the camera weight and the structures, facilitate moving the camera (s) including sled against gravity.
  • control can be either manually decentralized at the
  • a small mobile control unit can be used, such.
  • a W-Lan or Bluetooth-connected controller e.g., subnotebook
  • customized software and a user interface can control at least one engine. There may also be stored data for controlling at least one motor. Similarly, a control manually via cable, radio or other transmission paths from a central location is possible (eg control room with corresponding image monitoring devices, eg suitable for plastic recording, monitors). If several recording devices in use (eg in a multi-camera operation), an operator can either control each recording device with its own control unit or its own controls or switch between the recording devices or motors within a recording device and with only ever mind
  • Control control The control of the motors can also be done automatically via a computer unit or control unit (decentralized to the receiving device or centrally, possibly also for several recording devices simultaneously). It can the
  • Control unit controlling the motors based on a calculating algorithm e.g., the stereo base / stereo bases or the convergence position / s of the camera / s.
  • the necessary values are either stored in the control unit (eg by a previous calibration or adjustment process), are entered by the user or at runtime from the equipment used (eg reading the lenses - eg focus and focal length) or by additional equipment (distance measurement obtained by laser, ultrasound, by triangulation, auxiliary cameras or by analysis of one or more live recorded image content).
  • a calculating algorithm e.g., the stereo base / stereo bases or the convergence position / s of the camera / s.
  • the necessary values are either stored in the control unit (eg by a previous calibration or adjustment process), are entered by the user or at runtime from the equipment used (eg reading the lenses - eg focus and focal length) or by additional equipment (distance measurement obtained by laser, ultrasound, by triangulation, auxiliary cameras or by analysis of one or more live recorded image content
  • Calibration values for the calibration motors or setting values for the motors, which change the plastic effect of the image also obtained by image-analyzing algorithms and, if necessary, previously set by the user limits and are used immediately for the control of the motors.
  • image correspondences for the detection of calibration errors (height error, rotation error, tilt error, etc.) or others
  • Setting parameters ⁇ stereo base are used.
  • the user may also manually image parts or correspondence points (e.g., the far, fake, or near points) in at least one of the images generated by the cameras via a
  • Image correspondences can also auxiliary devices, for example, with well recognizable in the image signal patterns or markers are introduced, which facilitate the search of the correspondenz searching algorithm or are more easily detected by distance measuring devices.
  • the user can at any time have intervention in the control of the motors via a user interface, and possibly make user-specific limits or an entire or partial manual control.
  • the parameters, notes on the quality of the calibration, the later Effect on the viewer of the plastic film or the limits of the plastic viewing or other useful information or suggestions can be communicated to the user on a display or other user interface.
  • all parameters eg stereo base, correction parameters, focal length, etc.
  • CGI compositing e.g. stored separately with the current time code
  • conversions of the recorded metadata to the miniature scale can be made automatically, and then applied to the setting of the capture device for the miniature scale.
  • all boundaries or settings e.g., the bill window, near or far, lens-visible capture cone
  • This provides a way of visualizing the
  • Setting parameters and limits for operator and / or for the persons involved in the recording / actor in object space can be, for example, a projection of the representable boundaries or the apparent window into the object space or a
  • HMD head-mounted display
  • This can be done by projecting into the set (for example, a laser attached to the tripod that automatically calculates its height and, due to geometrical calculations, changes the angle of a wide-ranging laser pointer depending on the distance.)
  • This can not be done by the recording camera
  • An embodiment would be a projection into the recording set, in which "forbidden" image areas are marked (eg marked in color) - this marking can be hidden for real recording or in human-visible but invisible to the camera by blocking filter wavelength ranges
  • An alternative to this would be a projection system (eg in time multiplex) synchronized with the cameras via, for example, Genlock, which uses the recording pauses (eg blanking interval between two images) to project certain areas into the recording room at precisely this moment and in time for the new image acquisition the cameo turn off ras again. This would make the marked and projected areas appear in integral human perception appear, whereas these are not visible to the cameras in the plastic image recording. Alternatively, these areas may be displayed
  • the above invention thus has the advantage that you do not need to rotate a movie twice with different stereo base settings. This would make neither financial nor design sense. Opposite two juxtaposed
  • the present invention contributes to three-dimensional imagery (meaning both photography and video or film) in a variety of ways

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
  • Studio Devices (AREA)

Abstract

La présente invention concerne un procédé et un dispositif de capture d'images tridimensionnelles pour différentes grandeurs d'affichage, selon lesquels la totalité du budget de profondeur est respectivement exploitée. A cette fin, on utilise au moins 3 caméras qui sont toutes dirigées sur un objet à capturer, qui présentent des axes optiques parallèles ou convergents, qui enregistrent simultanément tous les flux d'images et qui permettent de sélectionner les distances entre les caméras en fonction de paramètres de capture et de paramètres d'affichage ultérieur. Lors de la lecture, les flux d'images des caméras individuelles peuvent être combinés pour former au choix au moins deux flux d'images de caméra. Le procédé et le dispositif peuvent être utilisés à la fois pour la capture d'images fixe et pour la capture d'images en mouvement.
PCT/DE2011/001221 2010-06-16 2011-06-15 Procédé et dispositif de capture d'images tridimensionnelles pour différentes grandeurs d'affichage avec exploitation de tout le budget de profondeur respectif WO2012010117A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP11767894.6A EP2614651A1 (fr) 2010-06-16 2011-06-15 Procédé et dispositif de capture d'images tridimensionnelles pour différentes grandeurs d'affichage avec exploitation de tout le budget de profondeur respectif

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010024042A DE102010024042B4 (de) 2010-06-16 2010-06-16 Verfahren und Vorrichtung zur Aufnahme von dreidimensionalem Bildmaterial für unterschiedliche Darstellungsgrößen unter Ausnutzung des jeweils vollen Tiefenbudgets
DE102010024042.7 2010-06-16

Publications (1)

Publication Number Publication Date
WO2012010117A1 true WO2012010117A1 (fr) 2012-01-26

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Country Status (3)

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EP (1) EP2614651A1 (fr)
DE (1) DE102010024042B4 (fr)
WO (1) WO2012010117A1 (fr)

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WO2019144269A1 (fr) * 2018-01-23 2019-08-01 深圳前海达闼云端智能科技有限公司 Système de prise de vues à caméras multiples, dispositif terminal et robot
CN113316738A (zh) * 2019-08-06 2021-08-27 松下知识产权经营株式会社 显示装置

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DE102012107106A1 (de) * 2012-08-02 2014-02-06 Ortery Technologies, Inc. Vorrichtung zum Erweitern und Kontrollieren von Signalen eines Kameraverschlussauslösekabels über isolierte Schalter
DE102013015777B4 (de) * 2013-09-21 2024-02-15 Optonic Gmbh Stereokamera mit Projektor zur Erzeugung eines Prüfbildes

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DE202007010389U1 (de) 2007-07-24 2007-09-27 Maier, Florian Vorrichtung zur automatischen Positionierung von gekoppelten Kameras zur plastischen Bilddarstellung
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US20050053274A1 (en) * 2003-04-21 2005-03-10 Yaron Mayer System and method for 3D photography and/or analysis of 3D images and/or display of 3D images
DE102005042413B4 (de) 2005-09-06 2008-03-27 Florian Maier Vorrichtung und Verfahren zur Aufnahme von bewegten Objekten aus verschiedenen Perspektiven mit kleiner Stereobasis
DE202007010389U1 (de) 2007-07-24 2007-09-27 Maier, Florian Vorrichtung zur automatischen Positionierung von gekoppelten Kameras zur plastischen Bilddarstellung
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HOLLIMAN N S: "Mapping perceived depth to regions of interest in stereoscopic images", PROCEEDINGS OF THE SPIE, THE INTERNATIONAL SOCIETY FOR OPTICAL ENGINEERING SPIE, USA, vol. 5291, no. 1, 19 January 2004 (2004-01-19), pages 117 - 128, XP002526373, ISSN: 0277-786X, DOI: 10.1117/12.525853 *
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019144269A1 (fr) * 2018-01-23 2019-08-01 深圳前海达闼云端智能科技有限公司 Système de prise de vues à caméras multiples, dispositif terminal et robot
CN113316738A (zh) * 2019-08-06 2021-08-27 松下知识产权经营株式会社 显示装置
CN113316738B (zh) * 2019-08-06 2024-05-17 松下知识产权经营株式会社 显示装置

Also Published As

Publication number Publication date
EP2614651A1 (fr) 2013-07-17
DE102010024042B4 (de) 2012-03-29
DE102010024042A1 (de) 2011-11-17

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