Three-dimensional image processing apparatus, three-dimensional image processing method, and program

Patent metadata

Field	Value
Publication number	US-9064331-B2
Application number	US-201313929798-A
Country	US
Kind code	B2
Filing date	Jun 28, 2013
Priority date	Jan 13, 2011
Publication date	Jun 23, 2015
Grant date	Jun 23, 2015

Abstract

A three-dimensional image processing device for performing image correction processing on a three-dimensionally-viewed image includes a conversion unit and a composition unit. The conversion unit generates a converted image by performing tone conversion on a pixel value in an object included in the three-dimensionally-viewed image based on a relationship between a pixel value of a pixel of interest that is a processing target and a pixel value of a peripheral pixel of the pixel of interest. The composition unit synthesizes an n-th pixel in a first viewpoint image included in the three-dimensionally-viewed image and a corresponding pixel in a second viewpoint image included in the three-dimensionally-viewed image with a distribution ratio that is based on a subject distance of the n-th pixel. The corresponding pixel is located in the same spatial location as the n-th pixel.

First claim

What is claimed is:

1. A three-dimensional image processing device for performing image correction processing on a three-dimensionally-viewed image, comprising:
a first pixel value being a pixel value of a pixel of interest, the pixel of interest being a processing target;
a second pixel value being a pixel value of a peripheral pixel of the pixel of interest;
an n-th pixel in a first viewpoint image included in the three-dimensionally-viewed image;
a corresponding pixel in a second viewpoint image included in the three-dimensionally-viewed image, the corresponding pixel located in the same spatial location as the n-th pixel;
a conversion unit that generates a converted image by performing tone conversion on a third pixel value in an object included in the three-dimensionally-viewed image based on a relationship between the first pixel value and the second pixel value; and
a composition unit that synthesizes the n-th pixel and the corresponding pixel using a distribution ratio based on a subject distance of the n-th pixel.

2. The three-dimensional image processing device according to claim 1 , wherein:
the composition unit synthesizes an n-th pixel value and a corresponding pixel value such that the distribution ratio for the corresponding pixel value becomes greater as the subject distance of the n-th pixel value becomes smaller.

3. The three-dimensional image processing device according to claim 2 , wherein:
the composition unit synthesizes the n-th pixel value and the corresponding pixel value such that the distribution ratio for the corresponding pixel value becomes smaller as the subject distance of the n-th pixel value becomes greater.

4. The three-dimensional image processing device according to claim 3 , wherein:
the conversion unit performs shade or shadow emphasis processing on the pixel of interest by contrast emphasis processing.

5. The three-dimensional image processing device according to claim 3 , wherein:
the conversion unit performs shade or shadow emphasis processing on the pixel of interest by local contrast emphasis processing through visual processing.

6. The three-dimensional image processing device according to claim 3 , wherein:
the conversion unit performs shade or shadow emphasis processing on the pixel of interest by darkening a shade or a shadow.

7. The three-dimensional image processing device according to claim 2 , wherein:
the conversion unit performs shade or shadow emphasis processing on the pixel of interest by contrast emphasis processing.

8. The three-dimensional image processing device according to claim 2 , wherein:
the conversion unit performs shade or shadow emphasis processing on the pixel of interest by local contrast emphasis processing through visual processing.

9. The three-dimensional image processing device according to claim 2 , wherein:
the conversion unit performs shade or shadow emphasis processing on the pixel of interest by darkening shade or shadow.

10. The three-dimensional image processing device according to claim 1 , wherein:
the conversion unit further performs shade or shadow emphasis processing on the pixel of interest by contrast emphasis processing.

11. The three-dimensional image processing device according to claim 1 , wherein:
the conversion unit further performs shade or shadow emphasis processing on the pixel of interest by local contrast emphasis processing through visual processing.

12. The three-dimensional image processing device according to claim 1 , wherein:
the conversion unit further performs shade or shadow emphasis processing on the pixel of interest by darkening a shade or a shadow.

13. The three-dimensional image processing device according to claim 1 , wherein:
when a brightness value of the pixel of interest is lower than a brightness value of the peripheral pixel and the first value is fixed to a predetermined value, the conversion unit performs the tone conversion using a tone conversion characteristic in which the value of the tone-converted pixel of interest decreases as the value of the peripheral pixel increases.

14. The three-dimensional image processing device according to claim 13 , wherein:
when the brightness value of the pixel of interest is higher than the brightness value of the peripheral pixel, the conversion unit outputs the value of the pixel of interest as a pixel value for the converted image without performing the tone conversion.

15. The three-dimensional image processing device according to claim 13 , further including:
an offset value based on a variation in pixel values located in a predetermined area including the pixel of interest; and
wherein the conversion unit adds the offset value to the brightness value of the peripheral pixel, and performs the tone conversion on the pixel of interest based on a result of the addition.

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Yamashita Haruo
• Ito Takeshi
• Ono Hiromichi
• Kuwahara Yasuhiro

Classifications

• G06T2207/10012

  Stereo images · CPC title

• G06T5/50

  using two or more images, e.g. averaging or subtraction · CPC title

• G06T15/00 Primary

  Three-dimensional [3D] image rendering · CPC title

• G06T2207/20012

  Locally adaptive · CPC title

• H04N13/122

  Improving the three-dimensional [3D] impression of stereoscopic images by modifying image signal contents, e.g. by filtering or adding monoscopic depth cues (H04N13/128 takes precedence) · CPC title