Information processing device and method, program, and information processing system

Abstract

An information processing device, configured to perform color gamut conversion for compressing or enlarging the color gamut of image data, includes: a selecting unit configured to select a plurality of coordinate movement directions to be synthesized for determining the coordinate movement destination of a pixel to be processed during the color gamut conversion; a coordinate moving unit configured to move the coordinates of the pixel to be processed in each of the selected plurality of directions; and a synthesizing unit configured to synthesize coordinate movement in the selected plurality of directions.

What is claimed is: 
     
       1. An information processing device configured to perform color gamut conversion for compressing or enlarging the color gamut of image data, comprising:
 selecting means configured to select a plurality of coordinate movement directions to be synthesized for determining the coordinate movement destination of a pixel to be processed during said color gamut conversion; 
 coordinate moving means configured to move the coordinates of said pixel to be processed in each of the selected plurality of directions; and 
 synthesizing means configured to synthesize coordinate movement in the selected plurality of directions, 
 wherein color gamut conversion is performed according to original color gamut information and target color gamut information, and wherein the original color gamut information and the target color gamut information is generated according to a cusp table which is rendered according to one of an index and xy chromaticity data of three primary colors, 
 wherein said selecting means select selects a plurality of said coordinate movement directions based on regarding whether or not color gamut enlargement processing for enlarging a color gamut is performed as said color gamut conversion, 
 wherein said selecting means select selects a saturation direction, and a rectilinear direction which connects a black point or white point and said pixel to be processed as said coordinate movement directions in a case wherein said color gamut enlargement processing is not performed, and select selects a saturation direction, and a rectilinear direction which connects a point, which is disposed on a luminance axis, having the same luminance value as that of the maximum saturation point, and said pixel to be processed as said coordinate movement directions in a case wherein said color gamut enlargement processing is performed. 
 
     
     
       2. An information processing device configured to perform color gamut conversion for compressing or enlarging the color gamut of input image data, comprising:
 selecting unit configured to select a plurality of coordinate movement directions to be synthesized for determining the coordinate movement destination of a pixel to be processed during said color gamut conversion;   coordinate moving unit configured to move the coordinates of said pixel to be processed in each of the selected plurality of directions; and   synthesizing unit configured to synthesize coordinate movement in the selected plurality of directions so as to generate synthesized image data,   wherein color gamut conversion is performed according to original color gamut information and target color gamut information, and   wherein the original color gamut information and the target color gamut information is generated according to a cusp table which is rendered according to one of an index and xy chromaticity data of three primary colors,   wherein said selecting unit selects a plurality of said coordinate movement directions based on whether or not color gamut enlargement processing for enlarging a color gamut is performed as said color gamut conversion,   wherein said selecting unit
 selects a saturation direction, and a rectilinear direction which connects a black point or white point and said pixel to be processed as said coordinate movement directions in a case wherein said color gamut enlargement processing is not performed, and 
 selects a saturation direction, and a rectilinear direction which connects a point, which is disposed on a luminance axis, having the same luminance value as that of the maximum saturation point, and said pixel to be processed as said coordinate movement directions in a case wherein said color gamut enlargement processing is performed. 
   
     
     
       3. The information processing device according to claim 2,
 wherein said coordinate moving unit moves said pixel to be processed in the rectilinear direction which connects the black point and said pixel to be processed in a case wherein the luminance of said pixel to be processed is brighter than the luminance of the maximum saturation point, and moves said pixel to be processed in the rectilinear direction which connects the white point and said pixel to be processed in a case wherein the luminance of said pixel to be processed is darker than the luminance of the maximum saturation point.   
     
     
       4. The information processing device according to claim 2,
 wherein said synthesizing unit synthesizes coordinate movement performed in the selected plurality of directions with a ratio based on a blend function.   
     
     
       5. The information processing device according to claim 4,
 wherein the blend function changes depending on a hue.   
     
     
       6. The information processing device according to claim 2,
 wherein the input image data and the synthesized image data are a YCH format.   
     
     
       7. The information processing device according to claim 6, further comprising:
 a format conversion unit configured to convert the synthesized image data from the YCH format into a YCC format.   
     
     
       8. An information processing method to perform color gamut conversion for compressing or enlarging the color gamut of input image data, comprising the steps of:
 selecting a plurality of coordinate movement directions to be synthesized for determining the coordinate movement destination of a pixel to be processed during said color gamut conversion;   moving the coordinates of said pixel to be processed in each of the selected plurality of directions; and   synthesizing, by a processor, coordinate movement in the selected plurality of directions so as to generate synthesized image data,   wherein color gamut conversion is performed according to original color gamut information and target color gamut information, and   wherein the original color gamut information and the target color gamut information is generated according to a cusp table which is rendered according to one of an index and xy chromaticity data of three primary colors,   wherein a plurality of said coordinate movement directions are selected based on whether or not color gamut enlargement processing for enlarging a color gamut is performed as said color gamut conversion,   wherein
 a saturation direction, and a rectilinear direction which connects a black point or white point and said pixel to be processed as said coordinate movement directions are selected in a case wherein said color gamut enlargement processing is not performed, and 
 a saturation direction, and a rectilinear direction which connects a point, which is disposed on a luminance axis, having the same luminance value as that of the maximum saturation point, and said pixel to be processed as said coordinate movement directions are selected in a case wherein said color gamut enlargement processing is performed. 
   
     
     
       9. The information processing method according to claim 8,
 wherein said pixel to be processed is moved in the rectilinear direction which connects the black point and said pixel to be processed in a case wherein the luminance of said pixel to be processed is brighter than the luminance of the maximum saturation point, and said pixel to be processed is moved in the rectilinear direction which connects the white point and said pixel to be processed in a case wherein the luminance of said pixel to be processed is darker than the luminance of the maximum saturation point.   
     
     
       10. The information processing method according to claim 8,
 wherein coordinate movement performed in the selected plurality of directions are synthesized with a ratio based on a blend function.   
     
     
       11. The information processing device according to claim 10,
 wherein the blend function changes depending on a hue.   
     
     
       12. The information processing method according to claim 8,
 wherein the input image data and the synthesized image data are a YCH format.   
     
     
       13. The information processing method according to claim 12, further comprising the steps of:
 converting the synthesized image data from the YCH format into a YCC format.   
     
     
       14. A non-transitory computer readable recording medium having stored thereon a program enabling a computer to execute an information processing method to perform color gamut conversion for compressing or enlarging the color gamut of input image data, the method comprising the steps of:
 selecting a plurality of coordinate movement directions to be synthesized for determining the coordinate movement destination of a pixel to be processed during said color gamut conversion;   moving the coordinates of said pixel to be processed in each of the selected plurality of directions; and   synthesizing coordinate movement in the selected plurality of directions so as to generate synthesized image data,   wherein color gamut conversion is performed according to original color gamut information and target color gamut information, and   wherein the original color gamut information and the target color gamut information is generated according to a cusp table which is rendered according to one of an index and xy chromaticity data of three primary colors,   wherein a plurality of said coordinate movement directions are selected based on whether or not color gamut enlargement processing for enlarging a color gamut is performed as said color gamut conversion,   wherein
 a saturation direction, and a rectilinear direction which connects a black point or white point and said pixel to be processed as said coordinate movement directions are selected in a case wherein said color gamut enlargement processing is not performed, and 
 a saturation direction, and a rectilinear direction which connects a point, which is disposed on a luminance axis, having the same luminance value as that of the maximum saturation point, and said pixel to be processed as said coordinate movement directions are selected in a case wherein said color gamut enlargement processing is performed. 
   
     
     
       15. The non-transitory computer readable recording medium according to claim 14,
 wherein said pixel to be processed is moved in the rectilinear direction which connects the black point and said pixel to be processed in a case wherein the luminance of said pixel to be processed is brighter than the luminance of the maximum saturation point, and said pixel to be processed is moved in the rectilinear direction which connects the white point and said pixel to be processed in a case wherein the luminance of said pixel to be processed is darker than the luminance of the maximum saturation point.   
     
     
       16. The non-transitory computer readable recording medium according to claim 14,
 wherein coordinate movement performed in the selected plurality of directions are synthesized with a ratio based on a blend function.   
     
     
       17. The non-transitory computer readable recording medium according to claim 16,
 wherein the blend function changes depending on a hue.   
     
     
       18. The non-transitory computer readable recording medium according to claim 14,
 wherein the input image data and the synthesized image data are a YCH format.   
     
     
       19. The non-transitory computer readable recording medium according to claim 18, the method further comprising the steps of converting the synthesized image data from the YCH format into a YCC format.