Information processing device and method, and program, for gamut conversion of content
An information processing device, method and program may properly perform gamut conversion of content and be applied to a gamut conversion device. A restoration conversion state confirming unit performs confirmation such as gamut conversion state of image data read out from an optical disc and the existence or not of restoration metadata. An information exchange unit communicates with an output device via a communication unit, and performs information exchange such as the existence or not of restoration processing functionality and gamut conversion functionality and the like. A determining unit determines whether or not restoration processing is performed with a playing device, based on information obtained by the restoration conversion state confirming unit and the information exchange unit. Similarly, the determining unit determines whether or not to perform gamut conversion processing with the playing device, based on information obtained by the restoration conversion state confirming unit and the information exchange unit.
1. An information processing device comprising:
a processor to:
perform a gamut conversion to an input image so as to generate an output image whose gamut is narrower than a gamut of the input image;
based on a result of a determination whether a metadata generating condition indicating whether to generate metadata is satisfied, generate metadata that includes parameters of an isosbestic point table used by a color mapping processing which maps each pixel of the output image so that a gamut of a mapped image after the color mapping process is wider than the gamut of the output image; and
associate said metadata to said output image.
2. The information processing device according claim 1 , wherein said processor generates said metadata in the case the result of the determination indicates that a word length as a number of bits of each pixel of image data of said output image is higher than a predetermined word length as a number of bits.
3. An information processing method comprising:
a step of gamut conversion of an input image so as to generate an output image whose gamut is narrower than a gamut of the input image;
a metadata generating step to generate, based on a result of a determination whether a predetermined metadata generating condition indicating whether to generate metadata is satisfied, metadata that includes parameters of an isosbestic point table used by a color mapping data processing which maps each pixel of the output image so that a gamut of a mapped image after the color mapping process is wider than the gamut of the output image to the gamut of the input image; and
a step to associate said generated metadata to said output image,
wherein the step of gamut conversion, the metadata generating step and the step to associate are by a processor.
4. A non-transitory recording medium on which is recorded a program that causes a computer to execute an information processing method comprising:
a step of gamut conversion of an input image so as to generate an output image whose gamut is narrower than a gamut of the input image;
a metadata generating step to generate, based on a result of a determination whether a predetermined metadata generating condition indicating whether to generate metadata is satisfied, metadata that includes parameters of an isosbestic point table used by a color mapping processing which maps each pixel of the output image so that a gamut of a mapped image after the color mapping process is wider than the gamut of the output image; and
a step to associate said generated metadata to said image.
5. The information processing device according claim 1 , wherein the result of the determination is based on whether a word length as a number of bits of compression data generated for the output image is at least a predetermined word length as a number of bits.
6. The information processing device according to claim 1 , wherein the result of the determination is based on whether a user specifies attaching of the metadata.
7. The information processing device according to claim 1 , wherein the metadata includes data indicating a gamut conversion target range.
8. The information processing device according to claim 1 , wherein the metadata includes data indicating degree of gamut conversion, in which the data indicating degree of gamut conversion is an inverse function of the gamut conversion.
9. The information processing device according to claim 1 , wherein the metadata includes data indicating direction of the color mapping processing.
10. The information processing device according to claim 1 , wherein the gamut conversion is temporary compression.
11. The information processing device according to claim 1 , wherein the information processing device is a recording device.
12. The information processing device according to claim 11 , wherein the recording device includes an imaging unit to generate the input image.
13. The information processing method according to claim 3 , wherein the metadata includes data indicating a gamut conversion target range.
14. The information processing method according to claim 3 , wherein the restoration metadata includes data indicating degree of gamut conversion, in which the data indicating degree of gamut conversion is an inverse function of the gamut conversion.
15. The information processing method according to claim 3 , wherein the metadata includes data indicating direction of the color mapping processing.
16. The information processing method according to claim 3 , wherein the gamut conversion is temporary compression.
17. The information processing method according to claim 3 , wherein the information processing method is executed in a recording device.
18. The information processing method according to claim 17 , wherein the recording device includes an imaging unit to generate the input image.
19. The recording medium according to claim 4 , wherein the metadata includes data indicating a gamut conversion target range.
20. The recording medium according to claim 4 , wherein the metadata includes data indicating degree of gamut conversion, in which the data indicating degree of gamut conversion is an inverse function of the gamut conversion.
21. The recording medium according to claim 4 , wherein the metadata includes data indicating direction of the color mapping processing.
22. The recording medium according to claim 4 , wherein the gamut conversion is temporary compression.
23. The recording medium according to claim 4 , wherein the program is executed in a recording device.
24. The recording medium according to claim 23 , wherein the recording device includes a imaging unit to generate the input image.
25. The information processing device of claim 1 , wherein the color mapping processing maps the each pixel of the output image from an isosbestic point determined from the isosbestic point table toward a direction facing a processing target pixel.
26. The information processing device of claim 1 , wherein the metadata includes a Cusp table.
27. The information processing method of claim 3 , wherein the metadata includes a Cusp table.
28. The non-transitory recording medium of claim 4 , wherein the metadata includes a Cusp table.