Using a residual image formed from a clipped limited color gamut digital 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 the steps of:
- 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 clipped limited color gamut digital image in which portions of the limited color gamut digital image have been clipped to eliminate color values where the limited color gamut digital image is highly quantized;
d) determining a residual image representing a difference between the extended color gamut digital image and the clipped limited color gamut digital image; and
e) 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.
5 Assignments
0 Petitions
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 comprising the steps of: 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 clipped limited color gamut digital image in which highly quantized regions in the limited color gamut digital image have been clipped; determining a residual image representing a difference between the extended color gamut digital image and the clipped 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.
-
Citations
30 Claims
-
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 the steps of:
-
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 clipped limited color gamut digital image in which portions of the limited color gamut digital image have been clipped to eliminate color values where the limited color gamut digital image is highly quantized;
d) determining a residual image representing a difference between the extended color gamut digital image and the clipped limited color gamut digital image; and
e) 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
-
-
22. 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 the steps of:
-
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 clipped limited color gamut digital image in which portions of the limited color gamut digital image have been clipped to eliminate color values where the limited color gamut digital image is highly quantized;
d) determining a residual image representing a difference between the extended color gamut digital image and the clipped limited color gamut digital image;
e) 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;
f) specifying a desirable modification to the image; and
g) 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 (23, 24, 25)
-
-
26. 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 the steps of:
-
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) decompressing the limited color gamut digital image in the storage color space to form an decompressed limited color gamut digital image;
e) determining a clipped limited color gamut digital image in which portions of the decompressed limited color gamut digital image have been clipped to eliminate color values where the limited color gamut digital image is highly quantized;
f) determining a residual image representing a difference between the extended color gamut digital image and the clipped limited color gamut digital image; and
g) associating 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. - View Dependent Claims (27)
-
-
28. 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 the steps of:
-
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 clipped limited color gamut digital image in which portions of the limited color gamut digital image have been clipped to eliminate color values where the limited color gamut digital image is highly quantized;
d) determining a residual image representing a difference between the extended color gamut digital image and the clipped limited color gamut digital image; and
e) 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.
-
-
29. 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 the steps:
-
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 clipped limited color gamut digital image in which portions of the limited color gamut digital image have been clipped to eliminate color values where the limited color gamut digital image is highly quantized;
d) determining a residual image representing a difference between the extended color gamut digital image and the clipped limited color gamut digital image;
e) 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;
f) specifying a desirable modification to the image; and
g) 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.
-
-
30. 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 the steps of:
-
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) decompressing the limited color gamut digital image in the storage color space to form an decompressed limited color gamut digital image;
e) determining a clipped limited color gamut digital image in which portions of the decompressed limited color gamut digital image have been clipped to eliminate color values where the limited color gamut digital image is highly quantized;
f) determining a residual image representing a difference between the extended color gamut digital image and the clipped limited color gamut digital image; and
g) associating 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.
-
Specification