WO1997018677A1 - Camera video autostereoscopique - Google Patents

Camera video autostereoscopique Download PDF

Info

Publication number
WO1997018677A1
WO1997018677A1 PCT/GB1995/002698 GB9502698W WO9718677A1 WO 1997018677 A1 WO1997018677 A1 WO 1997018677A1 GB 9502698 W GB9502698 W GB 9502698W WO 9718677 A1 WO9718677 A1 WO 9718677A1
Authority
WO
WIPO (PCT)
Prior art keywords
shutter
camera according
image
receiving means
image receiving
Prior art date
Application number
PCT/GB1995/002698
Other languages
English (en)
Inventor
John Richard Moore
Original Assignee
Asd (Holdings) Limited
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 Asd (Holdings) Limited filed Critical Asd (Holdings) Limited
Priority to AU38760/95A priority Critical patent/AU3876095A/en
Priority to PCT/GB1995/002698 priority patent/WO1997018677A1/fr
Publication of WO1997018677A1 publication Critical patent/WO1997018677A1/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
    • H04N13/204—Image signal generators using stereoscopic image cameras
    • H04N13/207—Image signal generators using stereoscopic image cameras using a single 2D image sensor
    • H04N13/225—Image signal generators using stereoscopic image cameras using a single 2D image sensor using parallax barriers
    • 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
    • H04N13/257—Colour aspects
    • 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
    • H04N13/302—Image reproducers for viewing without the aid of special glasses, i.e. using autostereoscopic displays
    • H04N13/31—Image reproducers for viewing without the aid of special glasses, i.e. using autostereoscopic displays using parallax barriers
    • 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
    • H04N13/324—Colour aspects
    • 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
    • H04N13/189—Recording image signals; Reproducing recorded image signals
    • 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
    • H04N13/194—Transmission of image signals
    • 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
    • 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
    • H04N13/246—Calibration of cameras
    • 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
    • H04N13/327—Calibration 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
    • H04N13/398—Synchronisation thereof; Control thereof

Definitions

  • This invention relates to autostereoscopic image receiving, recordal, and display.
  • Autostereoscopic three dimensional display systems are known wherein multiple images of an object are recorded by multiple cameras arranged at varying positions around the object. The recorded multiple images are displayed by recreating each image on a display that makes each image appear to emanate from a different position, so that a viewer perceives a three dimensional image to be present.
  • Such image recording technology does, however, have the drawback that the provision of multiple cameras is costly, and that the relative positions of the cameras must be accurately maintained in order to provide an acceptable set of images.
  • Employing multiple cameras also makes recordal of images outside of a studio difficult to achieve as systems are generally bulky and non-portable.
  • a further problem with such devices is that they require complex circuitry for device synchronisation and image storage, even for real-time applications.
  • a camera comprising: an imaging lens; a shutter disposed adjacent to the imaging lens, the shutter comprising a plurality of individually activated apertures; image receiving means for receiving an image provided by light passing through the imaging lens and shutter; and shutter synchronising means for synchronously activating the image receiving means with each of the apertures in turn for a period long enough to enable the image receiving means to receive an image, to produce thereby a series of images of an object from different viewpoints.
  • the shutter apertures must be light transmissive, and preferably they are rectangular, dispersed laterally, and adjacent to one another. Preferably there are more than two apertures.
  • the image receiving means may receive images in the visible or non-visible spectra, or even in both.
  • the image receiving means may be a high speed CCD device.
  • the CCD device should have a frame rate of at least N x 50Hz, where N equals the number of shutter apertures.
  • the shutter may be a high speed spatial light modulator such as a ferroelectric liquid crystal device.
  • the imags receiving means output will be transmitted directly to a display. This may require the provision of additional control circuitry to synchronise the camera with an autostereoscopic system.
  • the image receiving means output may be recorded in an electronic storage device or on high speed recording media.
  • the image receiving means may be a high frame rate colour CCD.
  • 3 CCDs, each covered by a primary colour filter, may be provided.
  • the camera may alternatively be adapted to produce polychromatic images by the provision of a colour filter disposed adjacent to the shutter and comprising a plurality of regions each switchable between different colours to enable colour modulation of the received image.
  • the filter may include a rotatable disc having a plurality of differently coloured regions, or may comprise a plurality of regions that are individually switchable between a plurality of colours.
  • Fig. 1 is a diagram showing a prior art three dimensional camera system
  • Fig. 2 is a diagram showing the optical arrangement employed in a camera according to the present invention
  • Fig. 3 is a diagram showing the optical arrangement employed in a polychromatic camera according to the present invention.
  • Fig. 4 and 5 shows further examples of polychromatic cameras according to the present invention.
  • Fig. 6 is a diagram showing the synchronisation circuitry employed in the examples of the present invention.
  • a traditional 3D camera and display system employs a series of cameras 3 to provide images of an object 2 from a series of different views.
  • the images are relayed directly to a display screen 1, which displays each of the images in turn, with each image being displayed so as to appear to originate from different positions related to the camera position from which they emanated.
  • a viewer 4 perceives each of the images to originate from differing positions, if the images are displayed in rapid enough succession, the viewer 4 sees a single, apparently three dimensional, image.
  • Fig. 2 shows a simplified version of the optical arrangement employed in a camera according to the present invention.
  • the camera is provided with an image receiving means 5.
  • the image receiving means 5 is a monochromatic high frame rate charge-coupled device (CCD) , such as an EEV CCD13 , or similar opto-electronic device. It will be appreciated that other image receiving apparatus, such as a polychromatic high frame rate CCD may be employed.
  • the image receiving means 5 is coupled to a display (not shown) for real-time applications, or to a recording medium (not shown) for later display ;.n recording applications.
  • the shutter 8 comprises an array of individually activated apertures 7.
  • the shutter 8 may be a mechanical device, but is, due to the high speed of switching required, preferably a spatial light modulator, ferroelectric liquid crystal device.
  • the shutter is shown in front of the imaging lens 6 in this example, it may also be positioned behind it.
  • the width of the imaging lens 6 is chosen to provide the desired width of viewing position.
  • an objective lens 9 Positioned in front of the shutter 8 is an objective lens 9 which is not essential to the invention, but may be provided to allow greater optical design freedom.
  • both the imaging lens 6 and the objective lens 9 are shown as circular, but it will be appreciated that lenses of other shapes may be employed.
  • a shutter synchronising means 12 which is an electronic or electromechanical device, triggers each of the apertures to open in turn.
  • the shutter synchronising means also triggers the image receiving means 5, which receives an image corresponding to the open aperture 7.
  • the shutter opening acts as an aperture stop in the lens and so a complete image is formed on the image receiving means 5.
  • the viewpoint of the image is centred on the open aperture centre.
  • the shutter synchronising means then closes the open aperture 7, transfers the received image from the image receiving means 5, resets the image receiving means 5, and opens the next aperture in sequence, and the image receiving process is repeated.
  • the new shutter aperture position produces an image on the receiving means from the viewpoint of the position of the new aperture.
  • each image is of the object from the viewpoint of the position of the shutter aperture, and thus when the image sequence is reproduced on a display 1 of the type described above, a three dimensional image of the object is generated.
  • FIG. 3 shows a polychromatic camera according to the present invention.
  • the arrangement of the polychromatic camera is similar to that for the camera described above, except for the provision of a switching colour filter 10 adjacent to the shutter 8.
  • the colour filter 10 comprises a plurality of individually activated rectangular regions 11, aligned with the shutter apertures 7, each of which is switchable between a plurality of colours.
  • the regions 11 are each switchable between the three primary colours, red, green and blue.
  • the polychromatic camera operates in a similar fashion to that of the monochromatic camera of Figure 2 , although it produces three " groups" of images in sequence, each group containing an image for each shutter aperture 7, with a group for each of the three shutter colours. This is known as a colour sequential operation.
  • Synchronizing means (figure 6) controls the operation of the filter 10, changing the colour of each of the regions just after the shutter aperture 7 which corresponds to the respective region 11 has been closed, to maximise the time available for the region to change to the next colour. This enables a filter of slower switching ⁇ ;peed to be employed.
  • An example of a colour filter that may be used with the present invention is the NU700S colour shutter from Tektronix Incorporated.
  • the colour filter 10 may be replaced by a rotatable disk which comprises a plurality of differently coloured regions (see figure 4) .
  • the filter synchronising means of figure 6 is adapted to control the speed of rotation of the filter in relation to shutter speed.
  • the disk is rotated at a speed which enables colour modulation of each of the images for all of ⁇ he shutter apertures 7 for each of the colours on the dis ⁇ .
  • Figure 5 shows an example of a further polychromatic camera according to the present invention.
  • three image receiving devices 5 are provided, with images from the shutter 8 being directed to all three image receiving devices 5 by a beamsplitter 13.
  • the image receiving devices 5 are high frame rate charge- coupled devices of the type employed in the example of Figure 2, although it will be appreciated that other devices may be employed.
  • the devices may be formed separately or as a single unit combined with the beamsplitter 13.
  • the operation of the device of this example is identical to that of earlier examples, apart from the fact that three image outputs occur.
  • Each image receiving means output is marked as representing a different colour, in this example the three primary colours.
  • Colour filters 14 are provided in front of each of the image receiving devices 5, or the filters can be removed if each image receiving device is sensitive to a different colour.
  • the interlacing or high speed sequential display of the three received images ensures that a display connected to the camera of this example displays a camera of this example displays a polychromatic image representative of the object being viewed by the camera.
  • Figure 6 shows a synchronisation circuitry 12 required to operate the shutter 8 and image receiving means 5, together with the colour filter 10 of the example of Figure 3.
  • the shutter 8 and filter 10 are formed as a single unit. It will be appreciated that simple electronic timing circuitry can be employed to provide the synchronisation circuitry 12, and that such circuitry can be readily adapted to control the examples of Figures 2, 4 and 5.

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

Abstract

Une caméra comprend une lentille (6) de formation d'image ainsi qu'un obturateur (8) placé au voisinage de cette lentille, lequel obturateur (8) comporte une pluralité d'ouvertures (7) commandées individuellement, des moyens (5) de réception d'image afin de recevoir une image fournie par la lumière passant à travers la lentille (6) de formation d'image et l'obturateur (8), ainsi que des moyens de synchronisation de cet obturateur (8) destinés à activer de manière synchrone les moyens (5) de réception d'images avec chacune des ouvertures (7) à leur tour, pendant une période suffisamment longue pour permettre aux moyens (5) de réception d'images de recevoir une image, afin de produire ainsi une série d'images d'un objet à partir de points de vue différents.
PCT/GB1995/002698 1995-11-16 1995-11-16 Camera video autostereoscopique WO1997018677A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU38760/95A AU3876095A (en) 1995-11-16 1995-11-16 Autostereoscopic video camera
PCT/GB1995/002698 WO1997018677A1 (fr) 1995-11-16 1995-11-16 Camera video autostereoscopique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/GB1995/002698 WO1997018677A1 (fr) 1995-11-16 1995-11-16 Camera video autostereoscopique

Publications (1)

Publication Number Publication Date
WO1997018677A1 true WO1997018677A1 (fr) 1997-05-22

Family

ID=10769460

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1995/002698 WO1997018677A1 (fr) 1995-11-16 1995-11-16 Camera video autostereoscopique

Country Status (2)

Country Link
AU (1) AU3876095A (fr)
WO (1) WO1997018677A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0969308A2 (fr) * 1998-07-01 2000-01-05 Canon Kabushiki Kaisha Système optique de photographie d'images stéréoscopiques, objectif à focale variable et système optique de prise de vues
WO2006095040A3 (fr) * 2005-03-10 2006-11-02 Galarraga Miguel Garcia Camera de capture d'images en trois dimensions et dispositif de visualisation 3d non stereoscopique ne necessitant pas l'utilisation de lunettes
WO2014190404A1 (fr) * 2013-05-31 2014-12-04 Massaru Amemiya Roberto Caméscope de capture tridimensionnelle de rayons et téléviseur de production d'une image réelle, formée dans la surface avant et dans la surface arrière du téléviseur ; dispositifs de filtre à rayons parallèles ; un mouvement de cellules optiques ou de cristaux liquides nivelés ou filtre à rayons parallèles avec un ensemble de lentilles mobiles incluant des lentilles flexibles multifocales ; procédés d'obtention de ces dispositifs
WO2015024090A1 (fr) * 2013-08-22 2015-02-26 Massaru Amemiya Roberto Appareil et procédé de traitement d'images entre un caméscope à images réelles et un téléviseur à images réelles
WO2015024091A1 (fr) * 2013-08-22 2015-02-26 Massaru Amemiya Roberto Caméscope à images réelles, affichage en 3d sans verre et procédés de capture et de reproduction de médias en 3d à l'aide de filtres de rayons parallèles

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4367486A (en) * 1980-03-18 1983-01-04 Jesse B. Eichenlaub Three dimensional imaging system
EP0195270A2 (fr) * 1985-02-20 1986-09-24 Matsushita Electric Industrial Co., Ltd. Caméra vidéo
US4758884A (en) * 1986-05-19 1988-07-19 Kaiser Electronics Electronically switched field sequential color video display having parallel color inputs
WO1992004799A1 (fr) * 1990-08-31 1992-03-19 Eastman Kodak Company Analyseur sequentiel coleur comportant un obturateur d'exposition variable synchronise
DE4228111C1 (fr) * 1992-08-25 1993-06-17 Ice Oelsnitz Gmbh, O-9920 Oelsnitz, De
WO1995014353A1 (fr) * 1993-11-19 1995-05-26 Asd (Holdings) Ltd. Moniteur autostereoscopique en couleur

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4367486A (en) * 1980-03-18 1983-01-04 Jesse B. Eichenlaub Three dimensional imaging system
EP0195270A2 (fr) * 1985-02-20 1986-09-24 Matsushita Electric Industrial Co., Ltd. Caméra vidéo
US4758884A (en) * 1986-05-19 1988-07-19 Kaiser Electronics Electronically switched field sequential color video display having parallel color inputs
WO1992004799A1 (fr) * 1990-08-31 1992-03-19 Eastman Kodak Company Analyseur sequentiel coleur comportant un obturateur d'exposition variable synchronise
DE4228111C1 (fr) * 1992-08-25 1993-06-17 Ice Oelsnitz Gmbh, O-9920 Oelsnitz, De
WO1995014353A1 (fr) * 1993-11-19 1995-05-26 Asd (Holdings) Ltd. Moniteur autostereoscopique en couleur

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0969308A2 (fr) * 1998-07-01 2000-01-05 Canon Kabushiki Kaisha Système optique de photographie d'images stéréoscopiques, objectif à focale variable et système optique de prise de vues
EP0969308A3 (fr) * 1998-07-01 2000-02-02 Canon Kabushiki Kaisha Système optique de photographie d'images stéréoscopiques, objectif à focale variable et système optique de prise de vues
WO2006095040A3 (fr) * 2005-03-10 2006-11-02 Galarraga Miguel Garcia Camera de capture d'images en trois dimensions et dispositif de visualisation 3d non stereoscopique ne necessitant pas l'utilisation de lunettes
ES2281238A1 (es) * 2005-03-10 2007-09-16 Miguel Garcia Galarraga Camara de captacion de imagenes en 3 dimensiones y dispositivo de visionado en 3d no estereoscopico que no requiere el uso de gafas.
WO2014190404A1 (fr) * 2013-05-31 2014-12-04 Massaru Amemiya Roberto Caméscope de capture tridimensionnelle de rayons et téléviseur de production d'une image réelle, formée dans la surface avant et dans la surface arrière du téléviseur ; dispositifs de filtre à rayons parallèles ; un mouvement de cellules optiques ou de cristaux liquides nivelés ou filtre à rayons parallèles avec un ensemble de lentilles mobiles incluant des lentilles flexibles multifocales ; procédés d'obtention de ces dispositifs
WO2015024090A1 (fr) * 2013-08-22 2015-02-26 Massaru Amemiya Roberto Appareil et procédé de traitement d'images entre un caméscope à images réelles et un téléviseur à images réelles
WO2015024091A1 (fr) * 2013-08-22 2015-02-26 Massaru Amemiya Roberto Caméscope à images réelles, affichage en 3d sans verre et procédés de capture et de reproduction de médias en 3d à l'aide de filtres de rayons parallèles
US10091487B2 (en) 2013-08-22 2018-10-02 Roberto Massaru Amemiya Real image camcorder, glass-free 3D display and processes for capturing and reproducing 3D media using parallel ray filters

Also Published As

Publication number Publication date
AU3876095A (en) 1997-06-05

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