CA2496353A1 - Method and apparatus for generating a stereographic image - Google Patents

Method and apparatus for generating a stereographic image Download PDF

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Publication number
CA2496353A1
CA2496353A1 CA002496353A CA2496353A CA2496353A1 CA 2496353 A1 CA2496353 A1 CA 2496353A1 CA 002496353 A CA002496353 A CA 002496353A CA 2496353 A CA2496353 A CA 2496353A CA 2496353 A1 CA2496353 A1 CA 2496353A1
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value
target pixel
pixel
pixels
image
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CA2496353C (en
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Kazunari Era
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    • 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
    • H04N13/261—Image signal generators with monoscopic-to-stereoscopic image conversion
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T15/00—3D [Three Dimensional] image rendering
    • G06T15/10—Geometric effects
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N13/00—Stereoscopic video systems; Multi-view video systems; Details 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
    • H04N13/275—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
    • H04N13/332—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
    • H04N2213/00—Details of stereoscopic systems
    • H04N2213/003—Aspects relating to the "2D+depth" image format

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Computer Graphics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
  • Processing Or Creating Images (AREA)
  • Image Processing (AREA)
  • Image Analysis (AREA)

Abstract

In a 3D image generating apparatus 1 depth values (Z-value) of pixels are calculated on the basis of grayscale values of 2D image data.
Next, a reverse determination, smoothing, distribution adjustment, local adjustment, and the like are performed on the Z-values. Next, parallaxes of pixels are determined on the basis of the Z-values of the pixels finally obtained, and the pixels are displaced acceding to the parallaxes, so as to generate data of a stereographic image.

Claims (17)

1. A method for generating a stereographic image comprising:
a calculating step of calculating Z-values of pixels on the basis of image data of pixels, the pixels forming an image, each Z-value being assigned to a pixel, and each Z-value representing a depth of an object corresponding to the pixel;
an adjusting step of adjusting a Z-value of a target pixel obtained in said calculating step using a Z-value of a pixel other than the target pixel;
and a generating step of determining an amount of displacement of a target pixel on the basis of an adjusted Z-value of the target pixel, and displacing the target pixel horizontally by the determined amount, to generate images for the right and the left eyes.
2. The method of Claim 1, wherein in said calculating step a Z-value of a target pixel is obtained by adding predetermined weights to color components of image data of the target pixel.
3. The method of Claim 2, wherein the weights are determined based on the ratio of cone cells sensitive of R, G, and B, respectively, which cones exist in a retina of a human eye.
4. The method of Claim 1, wherein in said adjusting step Z-values of pixels are adjusted so that a single step available for a Z-value of a pixel corresponding to an object located backward in an original image express deeper depth than a single step available for a Z-value of a pixel corresponding to an object located forward in the original image.
5. The method of Claim 1, wherein in said adjusting step:
tendency of Z-values of pixels in the image is analyzed by comparing a Z-value of a pixel within an area with a Z-value of a pixel within another area; and when a result of the analysis agrees with a predetermined condition, a quantitative relation between the amount of displacement of the target pixel and the Z-value of the target pixel is reversed in said generating step.
6. The method of Claim 1, wherein in said adjusting step:
an average of Z-values of pixels within an area which includes a target pixel is obtained; and a Z-value of the target pixel is replaced by the obtained average.
7. The method of Claim 1, wherein in said adjusting step:
a distribution of the Z-values of all pixels in the image and an average of all pixels in the image are obtained; and deviation of the distribution is corrected using the obtained average.
8. The method of Claim 1, wherein in said adjusting step:
at least one object in the image represented by the image data is identified referring to Z-values of pixels calculated in said calculating step;
and a Z-value of the target pixel is adjusted on the basis of a Z-value of a pixel located within an area corresponding to the identified object.
9. The method of Claim 1, wherein in said adjusting step a step size of quantization of the Z-value is determined based on a value of a parameter specified by a user.
10. The method of Claim 1, wherein in said adjusting step either an upper limit or a lower limit of the calculated Z-value is determined based on a value of a parameter specified by a user.
11. The method of Claim 11, further comprising a step of obtaining moving images comprised of a plurality of images, and wherein a stereographic image is generated from each image, to generate stereographic images corresponding to the moving images in real time.
12. A stereographic image generating apparatus for generating a stereographic image comprising:
a calculating means for calculating Z-values of pixels on the basis of image data of pixels, the pixels forming an image, each Z-value being assigned to a pixel, and each Z-value representing a depth of an object corresponding to the pixel;
an adjusting means for adjusting a Z-value of a target pixel obtained in said calculating means using a Z-value of a pixel other than the target pixel; and a generating means for determining an amount of displacement of a target pixel on the basis of an adjusted Z-value of the target pixel, and displacing the target pixel horizontally by the determined amount, to generate images for the right and the left eyes.
13. The apparatus of Claim 12, further comprising an obtaining means for obtaining from a user a parameter used in said adjusting means.
14.The apparatus of Claim 13, wherein the parameter represents either an upper limit or a lower limit of the Z-value.
15. The apparatus of Claim 13, wherein the parameter represents a step size of quantization of the Z-value.
16. The apparatus of Claim 13, further comprising:
storing means for storing image data for the right and the left eyes;
and displaying means for displaying an image represented by the image data stored in said storing means in compliance with a predetermined scheme.
17. A computer program product for causing a computer to function as:
a calculating means for calculating Z-values of pixels on the basis of image data of pixels, the pixels forming an image, each Z-value being assigned to a pixel, and each Z-value representing a depth of an object corresponding to the pixel;
an adjusting means for adjusting a Z-value of a target pixel obtained in said calculating means using a Z-value of a pixel other than the target pixel; and a generating means for determining an amount of displacement of a target pixel on the basis of an adjusted Z-value of the target pixel, and displacing the target pixel horizontally by the determined amount, to generate images for the right and the left eyes.
CA2496353A 2002-08-20 2003-08-20 Method and apparatus for generating a stereographic image Expired - Fee Related CA2496353C (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
JP2002-238709 2002-08-20
JP2002238709 2002-08-20
JP2002238710 2002-08-20
JP2002-238710 2002-08-20
PCT/JP2003/010499 WO2004019621A1 (en) 2002-08-20 2003-08-20 Method and device for creating 3-dimensional view image

Publications (2)

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CA2496353A1 true CA2496353A1 (en) 2004-03-04
CA2496353C CA2496353C (en) 2011-10-18

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CA2496353A Expired - Fee Related CA2496353C (en) 2002-08-20 2003-08-20 Method and apparatus for generating a stereographic image

Country Status (8)

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US (1) US7558420B2 (en)
EP (1) EP1551190B1 (en)
JP (1) JP4061305B2 (en)
KR (1) KR100659206B1 (en)
CN (1) CN1675937B (en)
AU (1) AU2003257611A1 (en)
CA (1) CA2496353C (en)
WO (1) WO2004019621A1 (en)

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CN1675937B (en) 2011-08-24
JP4061305B2 (en) 2008-03-19
CA2496353C (en) 2011-10-18
AU2003257611A1 (en) 2004-03-11
WO2004019621A1 (en) 2004-03-04
KR100659206B1 (en) 2006-12-19
KR20050050094A (en) 2005-05-27
US20050254702A1 (en) 2005-11-17
US7558420B2 (en) 2009-07-07
EP1551190B1 (en) 2018-08-08
EP1551190A1 (en) 2005-07-06
EP1551190A4 (en) 2008-06-04
JPWO2004019621A1 (en) 2005-12-15
CN1675937A (en) 2005-09-28

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