Using a residual image to represent an extended color gamut digital image
First Claim
1. A method for representing a digital image having color values with an extended color gamut in a storage color space having a limited color gamut comprising:
- a) adjusting the color values of the extended color gamut digital image to fit within the limited color gamut to form a limited color gamut digital image;
b) representing the limited color gamut digital image in the storage color space;
c) determining a difference between the extended color gamut digital image and the limited color gamut digital image forming a residual image; and
d) storing the residual image with the limited color gamut digital image in the storage color space such that the associated residual image and the limited color gamut digital image in the storage color space are adapted to be used to form a reconstructed extended color gamut digital image.
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Accused Products
Abstract
A method for representing a digital image having color values with an extended color gamut in a storage color space having a limited color gamut includes adjusting the color values of the extended color gamut digital image to fit within the limited color gamut to form a limited color gamut digital image; representing the limited color gamut digital image in the storage color space; determining a residual image representing a difference between the extended color gamut digital image and the limited color gamut digital image; and associating the residual image with the limited color gamut digital image in the storage color space such that the associated residual image and the limited color gamut digital image in the storage color space are adapted to be used to form a reconstructed extended color gamut digital image.
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Citations
34 Claims
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1. A method for representing a digital image having color values with an extended color gamut in a storage color space having a limited color gamut comprising:
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a) adjusting the color values of the extended color gamut digital image to fit within the limited color gamut to form a limited color gamut digital image;
b) representing the limited color gamut digital image in the storage color space;
c) determining a difference between the extended color gamut digital image and the limited color gamut digital image forming a residual image; and
d) storing the residual image with the limited color gamut digital image in the storage color space such that the associated residual image and the limited color gamut digital image in the storage color space are adapted to be used to form a reconstructed extended color gamut digital image. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. A method for representing and manipulating a digital image with an extended color gamut using a storage color space having a limited color gamut comprising:
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a) adjusting the color values of the extended color gamut digital image to fit within the limited color gamut to form a limited color gamut digital image;
b) representing the limited color gamut digital image in the storage color space;
c) determining a difference between the extended color gamut digital image and the limited color gamut digital image forming a residual image;
d) storing the residual image with the limited color gamut digital image in the storage color space such that the associated residual image and the limited color gamut digital image in the storage color space are adapted to be used to form a reconstructed extended color gamut digital image;
e) specifying a desirable modification to the image; and
f) using the residual image together with the limited color gamut digital image in the storage color space and the specified desirable modification to the image to produce a modified digital image. - View Dependent Claims (29, 30)
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31. A method for representing a digital image having color values with an extended color gamut in a storage color space having a limited color gamut comprising:
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a) adjusting the color values of the extended color gamut digital image to fit within the limited color gamut to form a limited color gamut digital image;
b) representing the limited color gamut digital image in the storage color space;
c) compressing the limited color gamut digital image in the storage color space;
d) determining a difference between the extended color gamut digital image and an uncompressed limited color gamut digital image computed from the compressed limited color gamut digital image in the storage color space forming a residual image; and
e) storing the residual image with the compressed limited color gamut digital image in the storage color space such that the associated residual image and the compressed limited color gamut digital image in the storage color space are adapted to be used to form a reconstructed extended color gamut digital image.
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32. A computer program product, comprising a computer readable storage medium, for representing a digital image having color values with an extended color gamut in a storage color space having a limited color gamut having a computer program stored thereon for performing:
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a) adjusting the color values of the extended color gamut digital image to fit within the limited color gamut to form a limited color gamut digital image;
b) representing the limited color gamut digital image in the storage color space;
c) determining a difference between the extended color gamut digital image and the limited color gamut digital image forming a residual image; and
d) storing the residual image with the limited color gamut digital image in the storage color space such that the associated residual image and the limited color gamut digital image in the storage color space are adapted to be used to form a reconstructed extended color gamut digital image.
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33. A computer program product for representing and manipulating a digital image with an extended color gamut using a storage color space having a limited color gamut, and having a computer readable storage medium with a computer program stored thereon for performing:
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a) adjusting the color values of the extended color gamut digital image to fit within the limited color gamut to form a limited color gamut digital image;
b) representing the limited color gamut digital image in the storage color space;
c) determining a difference between the extended color gamut digital image and the limited color gamut digital image forming a residual image;
d) storing the residual image with the limited color gamut digital image in the storage color space such that the associated residual image and the limited color gamut digital image in the storage color space are adapted to be used to form a reconstructed extended color gamut digital image;
e) specifying a desirable modification to the image; and
f) using the residual image together with the limited color gamut digital image in the storage color space and the specified desirable modification to the image to produce a modified digital image.
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34. A computer program product, comprising a computer readable storage medium, for representing a digital image having color values with an extended color gamut in a storage color space having a limited color gamut having a computer program stored thereon for performing:
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a) adjusting the color values of the extended color gamut digital image to fit within the limited color gamut to form a limited color gamut digital image;
b) representing the limited color gamut digital image in the storage color space;
c) compressing the limited color gamut digital image in the storage color space;
d) determining a difference between the extended color gamut digital image and an uncompressed limited color gamut digital image computed from the compressed limited color gamut digital image in the storage color space forming a residual image; and
e) storing the residual image with the compressed limited color gamut digital image in the storage color space such that the associated residual image and the compressed limited color gamut digital image in the storage color space are adapted to be used to form a reconstructed extended color gamut digital image.
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Specification