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WO1997003378A1 - Systeme a lentille mobile permettant de realiser des images en tridimensionnel - Google Patents

Systeme a lentille mobile permettant de realiser des images en tridimensionnel Download PDF

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Publication number
WO1997003378A1
WO1997003378A1 PCT/CA1996/000452 CA9600452W WO9703378A1 WO 1997003378 A1 WO1997003378 A1 WO 1997003378A1 CA 9600452 W CA9600452 W CA 9600452W WO 9703378 A1 WO9703378 A1 WO 9703378A1
Authority
WO
WIPO (PCT)
Prior art keywords
movable lens
image
lens
camera
stereoscopic viewing
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.)
Ceased
Application number
PCT/CA1996/000452
Other languages
English (en)
Inventor
Anthony B. Greening
Thomas N. Mitchell
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.)
International Telepresence Corp
Original Assignee
International Telepresence Corp
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 International Telepresence Corp filed Critical International Telepresence Corp
Priority to AU61857/96A priority Critical patent/AU6185796A/en
Publication of WO1997003378A1 publication Critical patent/WO1997003378A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • H04N13/10—Processing, recording or transmission of stereoscopic or multi-view image signals
    • H04N13/106—Processing image signals
    • H04N13/122—Improving the 3D impression of stereoscopic images by modifying image signal contents, e.g. by filtering or adding monoscopic depth cues
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/00163—Optical arrangements
    • A61B1/00193—Optical arrangements adapted for stereoscopic vision
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/00163—Optical arrangements
    • A61B1/00194—Optical arrangements adapted for three-dimensional imaging
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
    • G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
    • G02B30/22—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the stereoscopic type
    • G02B30/24—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the stereoscopic type involving temporal multiplexing, e.g. using sequentially activated left and right shutters
    • 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
    • H04N13/207—Image signal generators using stereoscopic image cameras using a single 2D image sensor
    • H04N13/211—Image signal generators using stereoscopic image cameras using a single 2D image sensor using temporal multiplexing
    • 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
    • H04N13/30—Image reproducers
    • H04N13/332—Displays for viewing with the aid of special glasses or head-mounted displays [HMD]
    • H04N13/341—Displays for viewing with the aid of special glasses or head-mounted displays [HMD] using temporal multiplexing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
    • H04N13/30—Image reproducers
    • H04N13/332—Displays for viewing with the aid of special glasses or head-mounted displays [HMD]
    • H04N13/334—Displays for viewing with the aid of special glasses or head-mounted displays [HMD] using spectral multiplexing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
    • H04N13/30—Image reproducers
    • H04N13/398—Synchronisation thereof; Control thereof

Definitions

  • the present invention relates to stereoscopic viewing of an image from a camera. More specifically, the present invention relates to a movable lens positioned in a single image path or light path and a high speed switching device for moving the lens thus providing right images and left images in the single path to provide stereoscopic viewing.
  • a camera for example, has a single image path or light path and produces a two dimensional image.
  • the term "camera” used throughout this specification means any type of single objective lens imaging system including a single imaging sensor together with lens or focusing arrangement which can produce or reproduce a picture of an object. Examples of such imaging systems include but are not limited to video cameras and film cameras.
  • a single lens stereoscopic imaging system is described in our co-pending U.S. patent application Serial No. 08/227,556, the disclosure of which is incorporated herein by reference.
  • a left and right image perspective are obtained by moving an opaque leaf laterally at high speed in an image path.
  • this system provides us with stereoscopic viewing, we can omit the opaque leaf and move a lens positioned in the image path from a right position to a left position to produce a right image and a left image in the single image path. These images may then be used for stereoscopic viewing.
  • the application of stereoscopic viewing or three dimensional imaging is particularly useful for endoscopic systems wherein the movable lens can be located between an endoscope and a fixed objective lens at the front of a video camera.
  • the lens moves between the two positions, two images are created at the sensitive surface of the video camera representing a left image and a right image.
  • a long focus movable lens may be located at the front of an objective lens of a video camera.
  • a stereoscopic optical system is incorporated with a high speed electromechanical switch moving the lens between the two positions.
  • An example of an optical system is that disclosed by Carter in U.S. Patent 4,761,066 which utilizes a beam splitter.
  • an example of a liquid crystal stereoscopic viewer is disclosed by Roese in U.S. Patent 4,021,846.
  • the concept of utilizing a passive eyewear for a stereoscopic viewer includes lenses with coloured filters therein. Such a system is disclosed in U.S. Patent 3,712,199 to Songer.
  • the present invention provides stereoscopic viewing utilizing existing two dimensional imaging systems.
  • the key difference in the present invention is that at least one lens is moved rather than an opaque leaf, thus there is no signal restriction or light restriction in the image path or light path.
  • the present invention provides an imaging system for producing three dimensional images comprising a camera for viewing an object in an image path, a movable lens positioned at a location in the image path between the object and the camera, the lens movable in the image path between a left position providing a left image in the image path and a right position providing a right image in the image path, the left image and the right image required for stereoscopic viewing, means for moving the movable lens between the left position and the right position and retain the movable lens in each position for a sufficient time for the camera to view the left image and the right image individually, stereoscopic viewing means to view the left image from the camera with one eye of a viewer and to view the right image from the camera with the other eye of the viewer, and synchronization means to synchronize the means for moving the movable lens and control the stereoscopic viewing means so that the viewer sees only the left image with one eye and only the right image with the other eye.
  • the present invention also provides a method of stereoscopic viewing an object comprising the steps of positioning a movable lens at a location in the image path between the object and a camera, moving the movable lens in the image path between a left position providing a left image in the image path and a right position providing a right image in the image path, the left image and the right image required for stereoscopic viewing, retaining the movable lens in the left position and the right position for a sufficient time for the camera to view the left image and the right image individually, and synchronizing alternately the left image and the right image on the camera with stereoscopic viewing means so that a viewer sees only the left image with one eye and only the right image with the other eye.
  • Figure 1 is a schematic diagram showing the components of the imaging system according to one embodiment of the present invention
  • Figure 2 is a schematic side elevational view showing an endoscope with fixed lens and video camera as presently known for two dimensional prior art viewing
  • Figures 3, 4 and 5 are schematic side elevational views showing an endoscope and video camera with a movable lens having different movements according to different embodiments of the present invention
  • Figures 6 and 7 are side elevational views showing linear movement of a movable lens between a first position and a second position
  • Figure 8 is a side elevational view showing a movable lens with a mechanism to rotate the lens about a lens axis
  • Figure 9 is a top view of the movable lens of Figure 8 showing the lens in a first position and in a second position
  • Figure 10 is a side elevational view showing a movable lens with a mechanism for moving the lens in an arc
  • Figure 11 is a top view of the movable lens of Figure 10, showing the lens in a first position and in a second position.
  • the components to make up the imaging system of the present invention include a camera 10 which in the embodiment shown has an objective lens 12 positioned in front thereof . In some instances additional lenses are provided; in other instances the objective lens may be the movable lens.
  • a movable lens 14 is positioned in an image path or light path 16 from an object and focuses the image onto the sensitive surface 18 of the video camera 10.
  • a high speed switching device 20 (more of which will be described hereafter) is attached to the movable lens 14 and provides movement from a first position to a second position, thus providing a left image and right image at the sensitive surface 18 of the video camera 10. Both the left image and the right image are within the image path 16.
  • the camera 10 provides a signal through a video processor 22 to a video monitor 24.
  • the video processor 22 also has therein a synchronizer which synchronizes the high speed switching device 20 with an electronic synchronizer 26 providing a signal to a stereoscopic viewing arrangement 28, in this case a pair of liquid crystal shuttered glasses.
  • a stereoscopic viewing arrangement 28 in this case a pair of liquid crystal shuttered glasses.
  • the video processor 22 synchronizes the movement of the movable lens 14 with the stereoscopic viewing arrangement 28 so that the right eye sees only the right image and the left eye sees only the left image.
  • the video processor 22 also corrects for offsets between the right and left image as well as aberrations caused by lens movements.
  • a standard endoscope arrangement 30 is shown in Figure 2 of the type known in the prior art and used for two dimensional viewing.
  • a video camera 10 and objective lens 12 are positioned on a light path 16 through a fixed lens 31, the light path 16 extends down an endoscope 30 for viewing an object.
  • Figures 3, 4 and 5 show schematic movements of the movable lens 14.
  • the movable lens 14 in Figures 3, 4 and 5 moves between a left position and a right position.
  • the movable lens 14 has a linear movement, moving a predetermined distance which changes the position or state of the lens and thus provides left images and right images when the movable lens 14 is in the left position or the right position.
  • the movable lens 14 creates two images, one of which is observed with the right eye, and the other with the left eye. These two images provide stereoscopic viewing.
  • offset images occur which if not corrected make viewing difficult.
  • the video processor 22 corrects the offset between the images by bringing them together thus a viewer sees the two images aligned one with the other.
  • Figure 4 illustrates the movable lens 14 rotating about a central axis through the center of the movable lens 14 and Figure 5 illustrates the movable lens 14 moving in an arc between a left position and a right position. It will be apparent that other arrangements of movement may be made for the movable lens 14, as long as the right position and the left position provide a right image and a left image on the image path or left path so the object is seen in parallax images thus providing a stereoscopic viewing through the stereoscopic viewing arrangement 28.
  • Figures 6 and 7 illustrate a mechanism for moving the movable lens 14 between two fixed positions.
  • Figure 6 shows the lens in what might be referred to as a right position when viewed from the right and
  • Figure 7 shows the lens 14 in what might be referred to as a left position when viewed from the right.
  • Two solenoids or electromagnets 32 each having dampers 34 are positioned one on each side of the movable lens 14 and the electronic synchronizer 20 activates the solenoids 32 so that the movable lens 14 moves linearly between the right position and the left position.
  • the dampers 34 assist in stopping the movable lens 14 with substantially no vibration as it is important that the lens 14 remains stationary in each position for an exposure from a camera.
  • Figures 8 and 9 illustrate a movable lens 14 with a mechanism for rotational movement between a right position and a left position.
  • the movable lens 14 is mounted at its center on an axial pin or shaft 36 between bearings 38.
  • An arm 40 attached to the pin or shaft 36 extends to an iron armature 42 which is moved by the two electromagnets 32 in the same manner as explained for the lateral movement of the movable lens 14 as shown in Figures 6 and 7.
  • Figures 10 and 11 show a movable lens 14 with a mechanism for moving in an arc between a right position and a left position.
  • the movable lens 14 is supported on an arm 44 with a right angle bend 46 therein.
  • the arm 44 has a pivot pin 48 supported by bearings 50 so that movement of the iron armature 42 between the two electromagnets 32 moves the movable lens 14 in an arc representing the distance between the movable lens 14 and the pivot pin 48.
  • the left image and the right image are seen by alternating frames of the camera 10.
  • the movable lens 14 remains motionless for the period when the exposure of the camera occurs.
  • the exposure time is 16.7 milliseconds or 33.3 milliseconds at the frame rate.
  • the ratio of 0.5 milliseconds to 16.7 milliseconds defines a 3% duty cycle or at the frame rate of 1.5 duty cycle. It is essential that all switching occurs in this short period and the movable lens remains stationary for the balance.
  • the time between adjacent frames is approximately 0.5 milliseconds whereas in the motion picture the exposure time as stated is 16.7 milliseconds or 33.3 milliseconds at the frame rate.
  • the time that the movable lens can be held in each of the positions is dependent upon the imaging system whether it be a film camera or a video camera.
  • the focal distance of the movable lens 14 is bigger than the focal distance of the objective lens 12.
  • the movable lens 14 is located at the exit pupil .
  • the movable lens is designed to create good quality images in both extreme positions regarding optical axis and the video processor 22 aligns the images and corrects for aberrations caused by the lens movement.
  • the dimensions of the movable lens are chosen so that the two positions permit the right image and the left image to pass therethrough without reduction in intensity of illumination near the edges of the lens.
  • the movable lens may be fixed or variable focal length, i.e., zoom.
  • the imaging system has been illustrated with an endoscope, it may also be associated with a microscope or a telescope, and functions in the same way with a camera to provide left and right images synchronized to the left and right eye of a viewer.
  • liquid crystal shuttered glasses are described as being a suitable stereoscopic viewing arrangement, there are other mechanisms available to differentiate at a viewer's eye between the left image and the right image and the present invention is not limited to any one of different types of stereoscopic viewing devices.
  • the present invention is not limited to any one of different types of stereoscopic viewing devices.
  • Various changes may be made to the embodiments shown herein without departing from the scope of the present invention which is limited only by the following claims.

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  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Surgery (AREA)
  • Optics & Photonics (AREA)
  • Pathology (AREA)
  • General Health & Medical Sciences (AREA)
  • Biophysics (AREA)
  • Radiology & Medical Imaging (AREA)
  • Veterinary Medicine (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Public Health (AREA)
  • General Physics & Mathematics (AREA)
  • Endoscopes (AREA)

Abstract

L'invention porte sur un système permettant de réaliser des images en tridimensionnel qui met en oeuvre des images de droite et des images de gauche dans un seul trajet d'images. Les images sont visualisées à travers un système de visualisation stéréoscopique, de sorte que l'utilisateur ne voit que les images de droite avec son oeil droit et les images de gauche avec son oeil gauche. Aucunes restrictions de signaux ou de lumière ne sont nécessaires dans le trajet de l'image, que ce soit l'image de droite ou l'image de gauche, de sorte qu'il n'y a pas de restrictions de visualisation. Le système comporte une caméra servant à visualiser l'objet dans le trajet de l'image et une lentille mobile placée dans le trajet de l'image et conçue pour se déplacer, de manière à ce que les images de droite et de gauche puissent se trouver dans le champ de la caméra. Le lentille est déplacée entre les deux positions de trajet de l'image et est maintenue dans chaque position suffisamment de temps pour que la caméra visualise chaque image. Un système de visualisation stéréoscopique fonctionne avec un système de synchronisation pour synchroniser le déplacement de la lentille, de sorte que l'utilisateur ne voit que les images de droite avec son oeil droit et les images de gauche avec son oeil gauche.
PCT/CA1996/000452 1995-07-07 1996-07-04 Systeme a lentille mobile permettant de realiser des images en tridimensionnel Ceased WO1997003378A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU61857/96A AU6185796A (en) 1995-07-07 1996-07-04 System with movable lens for producing three-dimensional images

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US49933595A 1995-07-07 1995-07-07
US08/499,335 1995-07-07

Publications (1)

Publication Number Publication Date
WO1997003378A1 true WO1997003378A1 (fr) 1997-01-30

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CA1996/000452 Ceased WO1997003378A1 (fr) 1995-07-07 1996-07-04 Systeme a lentille mobile permettant de realiser des images en tridimensionnel

Country Status (2)

Country Link
AU (1) AU6185796A (fr)
WO (1) WO1997003378A1 (fr)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001060076A1 (fr) * 1998-11-04 2001-08-16 Forte Visio Medica Ab Conception, fonctionnement et exploitation d'un equipement de capture d'images tridimensionnelles
US6624935B2 (en) 2000-12-06 2003-09-23 Karl Store Imaging, Inc. Single-axis stereoscopic video imaging system with centering capability
EP1175106A3 (fr) * 2000-07-18 2004-11-17 Scalar Corporation Dispositif et méthode de prise d'images stéréoscopiques
WO2011003168A1 (fr) * 2009-07-10 2011-01-13 Isee3D Inc. Procédé et appareil de génération d’informations d’image tridimensionnelle à l’aide d’un parcours unique d’imagerie
WO2011069469A1 (fr) * 2009-12-11 2011-06-16 Hospital Authority Système de visualisation stéréoscopique pour chirurgie
WO2011127550A1 (fr) * 2010-04-14 2011-10-20 Isee3D Inc. Appareil d'adaptation et procédé pour générer des informations sur des images tridimensionnelles
WO2013121353A1 (fr) * 2012-02-14 2013-08-22 Nokia Corporation Appareil et procédé pour la création d'une carte de profondeur
EP2229000A3 (fr) * 2009-03-09 2014-12-10 MediaTek Inc. Appareil et procédé de capture d'images stéréoscopiques d'une scène
US8988787B2 (en) 2012-04-27 2015-03-24 Qualcomm Incorporated System and method to deploy active dampening for lens ringing and vibration
CN106308730A (zh) * 2016-11-14 2017-01-11 中国科学院深圳先进技术研究院 一种腹腔镜系统
US10175469B2 (en) 2013-07-31 2019-01-08 Schölly Fiberoptic GmbH Endoscope having moveable beam deflecting element
EP3522520A1 (fr) * 2018-02-06 2019-08-07 HTC Corporation Procédé de traitement d'images, dispositif électronique et support d'enregistrement lisible par ordinateur non transitoire

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JPS60241018A (ja) * 1984-05-16 1985-11-29 Olympus Optical Co Ltd 立体視式内視鏡
DE3738667A1 (de) * 1986-11-13 1988-05-26 Olympus Optical Co Verfahren zum verarbeiten von endoskopischen abbildern
US5222477A (en) * 1991-09-30 1993-06-29 Welch Allyn, Inc. Endoscope or borescope stereo viewing system

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JPS60241018A (ja) * 1984-05-16 1985-11-29 Olympus Optical Co Ltd 立体視式内視鏡
DE3738667A1 (de) * 1986-11-13 1988-05-26 Olympus Optical Co Verfahren zum verarbeiten von endoskopischen abbildern
US5222477A (en) * 1991-09-30 1993-06-29 Welch Allyn, Inc. Endoscope or borescope stereo viewing system

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Title
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PATENT ABSTRACTS OF JAPAN vol. 10, no. 110 (P - 450)<2167> 24 April 1986 (1986-04-24) *

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001060076A1 (fr) * 1998-11-04 2001-08-16 Forte Visio Medica Ab Conception, fonctionnement et exploitation d'un equipement de capture d'images tridimensionnelles
EP1175106A3 (fr) * 2000-07-18 2004-11-17 Scalar Corporation Dispositif et méthode de prise d'images stéréoscopiques
US6624935B2 (en) 2000-12-06 2003-09-23 Karl Store Imaging, Inc. Single-axis stereoscopic video imaging system with centering capability
EP2229000A3 (fr) * 2009-03-09 2014-12-10 MediaTek Inc. Appareil et procédé de capture d'images stéréoscopiques d'une scène
US9298078B2 (en) 2009-07-10 2016-03-29 Steropes Technologies, Llc Method and apparatus for generating three-dimensional image information using a single imaging path
CN102725688A (zh) * 2009-07-10 2012-10-10 Isee3D有限公司 使用单成像路径生成三维图像信息的方法和装置
CN102725688B (zh) * 2009-07-10 2015-04-01 管理前街不同收入阶层的前街投资管理有限公司 使用单成像路径生成三维图像信息的方法和装置
WO2011003168A1 (fr) * 2009-07-10 2011-01-13 Isee3D Inc. Procédé et appareil de génération d’informations d’image tridimensionnelle à l’aide d’un parcours unique d’imagerie
US9442362B2 (en) 2009-07-10 2016-09-13 Steropes Technologies, Llc Method and apparatus for generating three-dimensional image information
WO2011069469A1 (fr) * 2009-12-11 2011-06-16 Hospital Authority Système de visualisation stéréoscopique pour chirurgie
WO2011127550A1 (fr) * 2010-04-14 2011-10-20 Isee3D Inc. Appareil d'adaptation et procédé pour générer des informations sur des images tridimensionnelles
TWI486633B (zh) * 2010-04-14 2015-06-01 Front Street Diversified Income Class By Its Manager Front Street Invest Man Inc 用於產生三維影像資訊之適配器設備及方法
WO2013121353A1 (fr) * 2012-02-14 2013-08-22 Nokia Corporation Appareil et procédé pour la création d'une carte de profondeur
US8988787B2 (en) 2012-04-27 2015-03-24 Qualcomm Incorporated System and method to deploy active dampening for lens ringing and vibration
US10175469B2 (en) 2013-07-31 2019-01-08 Schölly Fiberoptic GmbH Endoscope having moveable beam deflecting element
CN106308730A (zh) * 2016-11-14 2017-01-11 中国科学院深圳先进技术研究院 一种腹腔镜系统
EP3522520A1 (fr) * 2018-02-06 2019-08-07 HTC Corporation Procédé de traitement d'images, dispositif électronique et support d'enregistrement lisible par ordinateur non transitoire

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