WO2000028517A1 - Amelioration de la profondeur de champs et de la nettete d'unpanoramagramme parallaxe - Google Patents

Amelioration de la profondeur de champs et de la nettete d'unpanoramagramme parallaxe Download PDF

Info

Publication number
WO2000028517A1
WO2000028517A1 PCT/US1999/026676 US9926676W WO0028517A1 WO 2000028517 A1 WO2000028517 A1 WO 2000028517A1 US 9926676 W US9926676 W US 9926676W WO 0028517 A1 WO0028517 A1 WO 0028517A1
Authority
WO
WIPO (PCT)
Prior art keywords
image
stripes
sharpness
grouped
parallax
Prior art date
Application number
PCT/US1999/026676
Other languages
English (en)
Inventor
Lenny Lipton
Bruce Dorworth
Robert Akka
Original Assignee
Stereographics Corporation
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 Stereographics Corporation filed Critical Stereographics Corporation
Priority to AU19122/00A priority Critical patent/AU1912200A/en
Priority to US09/831,818 priority patent/US6850210B1/en
Publication of WO2000028517A1 publication Critical patent/WO2000028517A1/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
    • H04N13/221—Image signal generators using stereoscopic image cameras using a single 2D image sensor using the relative movement between cameras and objects
    • 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
    • H04N13/305—Image reproducers for viewing without the aid of special glasses, i.e. using autostereoscopic displays using lenticular lenses, e.g. arrangements of cylindrical lenses
    • 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
    • G02B30/26—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 autostereoscopic type
    • G02B30/27—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 autostereoscopic type involving lenticular arrays
    • 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
    • H04N13/20—Image signal generators
    • H04N13/275—Image signal generators from 3D object models, e.g. computer-generated stereoscopic 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
    • H04N13/30—Image reproducers
    • H04N13/349—Multi-view displays for displaying three or more geometrical viewpoints without viewer tracking
    • 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
    • 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
    • H04N13/239—Image signal generators using stereoscopic image cameras using two 2D image sensors having a relative position equal to or related to the interocular distance
    • 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
    • H04N13/286—Image signal generators having separate monoscopic and stereoscopic modes
    • 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
    • H04N13/30—Image reproducers
    • H04N13/332—Displays for viewing with the aid of special glasses or head-mounted displays [HMD]
    • H04N13/337—Displays for viewing with the aid of special glasses or head-mounted displays [HMD] using polarisation 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]
    • H04N13/341—Displays for viewing with the aid of special glasses or head-mounted displays [HMD] using temporal multiplexing

Definitions

  • This invention relates to parallax panoramagrams, also known as lenticular stereograms, and more particularly, to a method for increasing the depth and sharpness of images in lenticular stereograms.
  • lenticular stereogram also known as the parallax panoramagram.
  • the art has been very well traveled and is very well understood.
  • a stereoscopic depth effect may be achieved. As shown in
  • the lenticules 102 have semi-cylindrical surfaces aligned so that their length is in the vertical direction.
  • the lenticules are in intimate juxtaposition with a print surface 105, which contains columns of encoded visual information.
  • Each column is associated with a particular lenticule, and within each column there will be found a series of views ranging from a leftmost to a rightmost perspective.
  • the observer of a panoramagram print will see two perspectives rather than one due to the refractive surface of the panoramagram.
  • Stereographers have accepted this limitation. Those working in the field have been able to mask the defect, because it can be made to appear to be identical to the loss of sharpness which occurs in normal photographic reproduction due to depth of field effects. Indeed, in a typical panoramagram having a distant background and powerful stereoscopic effects which reach above the plane of the display, there will be an attempt to mask the lack of sharpness by suggesting that loss of focus is attributable to depth of field. This is a limitation that those skilled in the art of creating such displays have gotten around because of their artistic skill. Yet it is clear that the major benefit of the parallax panoramagram is to offer depth content. As long as the depth content is compromised, the display cannot be considered to be a fully perfected visual medium.
  • the present invention sets out to vastly increase the sharpness of the parallax panoramagram, and do so with means that are inexpensive and which produce an unequivocal improvement in sharpness for objects both in the distance and apparently close to the observer.
  • Figure 1 A is a perspective view of the structure of a lenticular stereogram.
  • Figure IB is a top view of the lenticular stereogram of Figure 1A.
  • Figure 1C is a schematic diagram illustrating the image columns of a lenticular stereogram.
  • Figure 2 shows the optical path of axial and off-axial rays for a single and representative lenticule of a lenticular screen.
  • Figure 1 A is a perspective view of a parallax panoramagram, also known as a lenticular stereogram, having a lenticular screen 101 and its associated print image 105.
  • Screen 101 is comprised of individual cylindrical lenticules 102.
  • the front surface of the print 105 is in intimate juxtaposition with the back of the lenticular screen 101.
  • the optics and organization of lenticular displays are generally well known to those in the art and are therefore not described in any detail. Our discussion is confined to descriptions that are relevant to the improvement of depth and sharpness disclosed herein.
  • Figure IB is a top view of the lenticular screen 101 and associated print surface 105 of Figure 1A.
  • the dotted lines 104a and 104b are for reference only and are perpendicular to the print surface 105. These lines 104a and 104b are meant to indicate the area under a particular lenticule which is devoted to the image that is specifically associated with that lenticule.
  • Brackets 103a, 103b and 103c are drawn at the surface of the print surface 105 to indicate the extent and width of a column.
  • columns 103a, 103b and 103c each have five individual image stripes, each stripe representing a particular section of a perspective view. It is well understood in the art that the leftmost and rightmost views are interchanged because of the refraction of the lenticular screen, which by its nature takes place only in the horizontal direction. For example, stripe la is the rightmost view and stripe 5c is the leftmost view. For didactic purposes, we are restricting the number of image stripes to five.
  • pixel is generally understood to mean a discrete picture element of a single color value which , in large quantities, make up a raster display, or a raster bitmap, or a raster printout.
  • pixel cluster an image element derived from a component bitmap, several of which make up a row of a lenticule column.
  • Our pixel clusters are square with their height and width the same dimension as the width of a stripe.
  • the pitch of the lenticular screen is defined as the number of lenticules in the horizontal direction.
  • a screen with 58 lenticules to the inch has a pitch of 58, and the width of the lenticule is the reciprocal of the pitch.
  • parallax panoramagrams may be produced in a number of ways.
  • the means available for producing a panoramagram have been restricted to cumbersome cameras, which might require motion of the camera across several feet over a period of many seconds. This effectively restricted the subject matter to still lifes or to people who were required to hold still for a long time.
  • FIG 2 shows the optical path of wave train 204 (on-axis) and wave train 205 (off- axis) intersecting a single lenticule 201 of a lenticular sheet or screen.
  • wave trains represent the image forming rays that will intersect with the eyes of an observer looking at the lenticular stereogram.
  • Surface 202 has a cylindrical curvature and in this horizontal section is a sector of a circle.
  • the focal length of the lenticule is approximately the length of the line 208.
  • Wave trains 204 and 205 come to focus at points 206 and 207 respectively.
  • Bracket 203 denotes the width of lenticule 201, which corresponds to any one of the columns 103a through 103c shown in Figs. IB and lC.
  • Focal point 206 corresponds to a central stripe, for example stripe 3
  • focal point 207 corresponds to another stripe, for example stripe 2.
  • Each eye of the observer sees its own perspective view when looking at a lenticular stereogram.
  • the observer may see image stripes 2a, 2b, 2c and so on for the right perspective view and image stripes 3a, 3b, 3c and so on for the left perspective view.
  • image stripes 2a, 2b, 2c and so on for the right perspective view
  • image stripes 3a, 3b, 3c and so on for the left perspective view.
  • the observer only sees twenty percent of the image with each eye and thus sees a series of stripes rather than an entire image, but that is not the case.
  • each eye is only seeing twenty percent of the image, one might conclude that the image would be substantially reduced in brightness, but that is not the case. What we have not considered is the focal spot size formed by the optics.
  • the spot size is an ellipse which may have a width greater than the width of a single stripe because of optical limitations. It is well known that even the best corrected optics cannot focus to a "perfect" point because of aberrations. The size of the spot is influenced by how well the optics are focused and how well they are corrected, since some aberrations may cause a spread of the spot size. Assuming that the focal length of the lens matches the distance from its optical center to the surface 203, such a simple lens cannot be well corrected because it cannot bring all wavelengths to focus at the same point. This lack of color correction is only one issue. The lenticules in a typical lenticular sheet are poorly corrected compared with, for example, a box camera lens.
  • off-axial focal spots may be even more spread out than axial spots for both optical and geometric reasons. Nevertheless, the optics do a decent job as will be observed when viewing the secondary zone image, which usually looks about as sharp as the primary zone. If the diminution in performance of off-axial rays are the key to the loss of sharpness in a lenticular stereogram, then this loss of sharpness would be exacerbated when viewing secondary zone images, and this is simply not the case. However, the questions about missing information and loss of brightness because of stripe width and focal spot size get right to the heart of the matter. The observer does not see a series of stripes because of the imperfections of the optical system. This is to a great extent helpful because it would be unpleasant to have the experience of looking through a vertical grating.
  • panoramagrams are produced by digital techniques using a computer. Graphics workstations are frequently used although a modern personal computer has adequate resources to perform the required techniques by using off-the-shelf software such as Adobe Photoshop.
  • a digital image is produced as a Windows bitmap (BMP) having a 24 bit RGB format.
  • BMP Windows bitmap
  • the images may be taken with standard cameras using silver-based materials, or with digital cameras. If taken with standard silver-based cameras, the images must first be digitized. Each image is sliced up into stripes, and these stripes are then ordered into columns. The columns are then ordered into groups of stripes, as shown in Figure IC, which shows portions of three adjacent columns made up of stripes numbered 1 through 5. The five stripes represent five image elements, or pixel clusters, derived from five original image components.
  • the image elements typically do not correspond to actual pixels.
  • the original image components need to be interdigitated using one of several possible techniques.
  • One technique based on standard anti-aliasing, is to compute how each image element should map to the actual pixel grid, and have that image element contribute to the pixel(s) that it maps to based on weighted averaging with other image elements.
  • Another technique is to find the single image element that maps to a particular pixel better than any other image element, and assign the best image element's color value to that pixel.
  • a stereo pair is represented by the combination of any two stripes.
  • stripe 1 and stripe 2 is a stereo pair
  • stripe 2 and stripe 5 is a stereo pair.
  • the subscripts appended to the stripe number in the drawing denotes that the stripe belongs to a particular column 103 a, 103b or 103c.
  • the technique for enhancing the sharpness of the panoramagram, or enhancing its depth consists of applying a sharpening filter to the interdigitated image, such as the filters found in Adobe Photoshop. That is, after the individual perspective views have been sliced up and ordered into stripes and then ordered into columns, it is at this point that a sharpening filter is used.
  • a sharpening filter is used.
  • all of the sharpening filters in Photoshop were used in experiments, including the Unsharp Mask, which in particular allows one to vary the amount of sharpness applied on an incremental basis.
  • a sharpening filter increases the contrast between the adjacent pixels.
  • the cure is to soften the boundary. Boundary stripes, for example, stripes 5a and lb or stripes 5b and lc, are relatively unrelated in terms of image context, and thus the sharpening filter produces the harsh vertical artifact described.
  • the cure is to use an averaging technique to soften the boundary stripes. This can be accomplished in a number of different ways. One way to accomplish this is to shrink the image elements in each lenticular column such that each lenticular column now fits two additional image element fields, thus, in our ongoing example, we would now have seven image elements per lenticular column instead of the original five.
  • the important technique is to essentially soften the discontinuity between adjacent lenticules. Once this has been accomplished, the artifact is greatly reduced or eliminated. To reiterate, the important steps are: interdigitate image components while applying an averaging technique, or a softening technique, to the lenticule column boundaries, and then apply a sharpening filter after the image has been interdigitated. It should be pointed out that this technique does not add any additional artifacts and does not reduce either the depth content of the stereogram or the extent of the viewing zone.
  • a further refinement would be to add sharpening which is proportional to the parallax of the image points. This could be done by creating a table of parallax values using the extreme left and right perspective views for the creation of such a table. The table could then be used to add an increasing amount of sharpness as a function, most beneficially as a linear function in many instances, to the image points. In point of fact it is rarely required since we have observed that a single value for the sharpening filtration usually produces a decent effect.
  • the results of the techniques described herein are entirely unexpected, are not predicted by the prior art, and have the great advantage of allowing the use of standard lenticular screens without any additional optical correction. Such correction would involve additional expense in terms of designing and calculating such a screen, if indeed it is possible to put such a design into practice, and then a great deal of money would have to be spent in actually fabricating such a lenticular screen.
  • the present invention by using computer techniques as described herein, avoids a costly and uncertain development process which would have undoubtedly resulted in lenticular screens that would be even more costly than the present product.
  • the present invention produces an entirely unexpected and startling improvement in the panoramagram, and does so for a very low cost.
  • the result is beneficial, and any observer would agree that such panoramagrams have a significantly extended depth content as a result of the application of this technique.
  • it is also possible to apply sharpening in the vertical direction only. When this approach is used, there is a noticeable improvement in sharpening, and little or none of the artifact described above.
  • Yet another approach or variation on the technique described above is to reverse the order of the stripes left to right within a column. As has been described above, right now each column has stripes which are ordered in a mirror image because of the optical inversion of the lenticular screen.

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Stereoscopic And Panoramic Photography (AREA)

Abstract

Selon l'invention, on a augmenté la profondeur de champs et la netteté sur un panoramagramme parallaxé en apposant un filtre de netteté après une interdigitation de parties multiples de l'images. Un trajet optique de trains d'ondes, l'un dans l'axe (204) et l'autre hors axe (205) coupe une lentille unique (201). La lentille possède une distance focale (208) et les trains d'ondes dans l'axe (204) et hors axe (205) correspondent à différentes bandes. Ces trains d'ondes (204, 205) convergent respectivement vers les points (206, 207). La surface (202) présente une courbe cylindrique, et le support (203) donne la largeur de la lentille (201). Chaque oeil de l'observateur voit en perspective quand il regarde un stéréogramme lenticulaire.
PCT/US1999/026676 1998-11-12 1999-11-12 Amelioration de la profondeur de champs et de la nettete d'unpanoramagramme parallaxe WO2000028517A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU19122/00A AU1912200A (en) 1998-11-12 1999-11-12 Parallax panoramagram having improved depth and sharpness
US09/831,818 US6850210B1 (en) 1998-11-12 1999-11-12 Parallax panoramagram having improved depth and sharpness

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10826898P 1998-11-12 1998-11-12
US60/108,268 1998-11-12

Publications (1)

Publication Number Publication Date
WO2000028517A1 true WO2000028517A1 (fr) 2000-05-18

Family

ID=22321209

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1999/026676 WO2000028517A1 (fr) 1998-11-12 1999-11-12 Amelioration de la profondeur de champs et de la nettete d'unpanoramagramme parallaxe

Country Status (2)

Country Link
AU (1) AU1912200A (fr)
WO (1) WO2000028517A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7046271B2 (en) 2000-01-25 2006-05-16 X3D Technologies Gmbh Method and system for the three-dimensional representation
US7321343B2 (en) 2001-09-06 2008-01-22 X3D Technologies Gmbh Method for auto-stereoscopic image display with a wavelength filter array
WO2012152346A1 (fr) * 2011-05-12 2012-11-15 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Écran autostéréoscopique, et procédé pour reproduire de l'information sous forme d'image
CN109765695A (zh) * 2019-03-29 2019-05-17 京东方科技集团股份有限公司 一种显示***和显示装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4959641A (en) * 1986-09-30 1990-09-25 Bass Martin L Display means for stereoscopic images
US5717453A (en) * 1995-06-07 1998-02-10 Meso Scale Technology, Inc. Three dimensional imaging system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4959641A (en) * 1986-09-30 1990-09-25 Bass Martin L Display means for stereoscopic images
US5717453A (en) * 1995-06-07 1998-02-10 Meso Scale Technology, Inc. Three dimensional imaging system

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7046271B2 (en) 2000-01-25 2006-05-16 X3D Technologies Gmbh Method and system for the three-dimensional representation
US7321343B2 (en) 2001-09-06 2008-01-22 X3D Technologies Gmbh Method for auto-stereoscopic image display with a wavelength filter array
WO2012152346A1 (fr) * 2011-05-12 2012-11-15 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Écran autostéréoscopique, et procédé pour reproduire de l'information sous forme d'image
KR20140022882A (ko) * 2011-05-12 2014-02-25 프라운호퍼 게젤샤프트 쭈르 푀르데룽 데어 안겐반텐 포르슝 에. 베. 자동 입체 영상 스크린 및 영상 정보를 재생하는 방법
US9838671B2 (en) 2011-05-12 2017-12-05 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Autostereoscopic screen and method for reproducing image information
KR101860435B1 (ko) * 2011-05-12 2018-06-29 프라운호퍼 게젤샤프트 쭈르 푀르데룽 데어 안겐반텐 포르슝 에. 베. 자동 입체 영상 스크린 및 영상 정보를 재생하는 방법
CN109765695A (zh) * 2019-03-29 2019-05-17 京东方科技集团股份有限公司 一种显示***和显示装置
CN109765695B (zh) * 2019-03-29 2021-09-24 京东方科技集团股份有限公司 一种显示***和显示装置

Also Published As

Publication number Publication date
AU1912200A (en) 2000-05-29

Similar Documents

Publication Publication Date Title
US6850210B1 (en) Parallax panoramagram having improved depth and sharpness
US5311329A (en) Digital filtering for lenticular printing
US6329987B1 (en) Lenticular image and method
US6373637B1 (en) Diagonal lenticular image system
JP3944188B2 (ja) 立体画像表示方法、立体画像撮像方法及び立体画像表示装置
JP4968943B2 (ja) マルチビューディスプレイ
US7839430B2 (en) Autostereoscopic reproduction system for 3-D displays
CN1977544B (zh) 3d显示方法和设备
US20100046069A1 (en) Method and arrangement for three-dimensional representation
US20020114078A1 (en) Resolution modulation in microlens image reproduction
US20110249331A1 (en) Method and Arrangement for Spatial Display
CA1313790C (fr) Appareil de photographie tridimensionnelle et structure d'images tridimensionnelles a mise au point generale
JP2009500648A (ja) 最適視距離への適合を伴うオートステレオスコピック表示の方法およびデバイス
CN110351544B (zh) 裸眼3d显示的三维图像编码方法及装置
Mashitani et al. Step barrier system multiview glassless 3D display
JPS61198896A (ja) 立体表示装置の立体表示方式
WO2000028517A1 (fr) Amelioration de la profondeur de champs et de la nettete d'unpanoramagramme parallaxe
JP4660769B2 (ja) 多視点立体ディスプレイ装置
Saishu et al. 53.3: Distortion Control in a One‐Dimensional Integral Imaging Autostereoscopic Display System with Parallel Optical Beam Groups
JP2007140554A (ja) 三次元画像表示装置
JPH09101481A (ja) レンチキュラー・ディスプレイ
JP2007140553A (ja) 三次元画像表示装置
RU113377U1 (ru) Устройство для создания автостереоскопического изображения (варианты)
DE102009022049B4 (de) Verfahren und Anordnung zur räumlichen Darstellung
Kubo et al. A viewing zone enlargement method for autostereoscopic display with eye tracking for the viewer observing at a large angle for the normal direction of the display

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AL AM AT AU AZ BA BB BG BR BY CA CH CN CU CZ DE DK EE ES FI GB GE GH GM HU ID IL IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT UA UG US UZ VN YU ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH GM KE LS MW SD SL SZ TZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
WWE Wipo information: entry into national phase

Ref document number: 09831818

Country of ref document: US

REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

122 Ep: pct application non-entry in european phase