US6282311B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Using a residual image to represent an extended color gamut digital image
Assignee: Monument Peak Ventures LLC
•
Filing: 1998-09-28
•
Granted: 2001-08-28
•
Expires: 2018-09-28
Abstract
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.
Inventors
- 👤 Ann L. McCarthy
- 👤 Kevin E. Spaulding
- 👤 Edward J. Giorgianni
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 17:46
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/46; H04N1/56; H04N1/60; H04N1/6058; G; G06; G06T; G06T11/00; G06T11/10
Claims Analysis
Total Claims: 40
Claim 1
Independent Claim
138 words
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.
Claim 2
Independent Claim
138 words
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.
Claim 3
Dependent Claim
17 words
The method of claim 1 where the storage color space is a particular device dependent color space.
Claim 4
Dependent Claim
16 words
The method of claim 2 where the storage color space is a video RGB color space.
Claim 5
Dependent Claim
28 words
The method of claim 3 further including previewing the digital image by displaying the limited color gamut digital image in the storage color space on a video display.
Claim 6
Dependent Claim
18 words
The method of claim 1 where the storage color space is a particular limited color gamut color space.
Claim 7
Dependent Claim
36 words
The method of claim 1 where the limited color gamut digital image is determined by clipping colors that are outside the limited color gamut so that they are on the surface of the limited color gamut.
Claim 8
Dependent Claim
22 words
The method of claim 1 where the limited color gamut digital image is determined by using gamut mapping that preserves color appearance.
Claim 9
Dependent Claim
38 words
The method of claim 1 where the limited color gamut digital image is determined by modifying color values that are outside the limited color gamut so that they are mapped to color values within the limited color gamut.
Claim 10
Dependent Claim
26 words
The method of claim 1 where the extended color gamut digital image has a larger range of chroma values than the limited color gamut digital image.
Claim 11
Dependent Claim
25 words
The method of claim 1 where the extended color gamut digital image has a larger luminance dynamic range than the limited color gamut digital image.
Claim 12
Dependent Claim
41 words
The method of claim 10 where the adjusting the color values of the extended color gamut digital image to determine the limited color gamut digital image includes applying a tone scale function to reduce the luminance dynamic range of the image.
Claim 13
Dependent Claim
18 words
The method of claim 10 wherein the extended luminance dynamic range digital image is a monochrome digital image.
Claim 14
Dependent Claim
22 words
The method of claim 1 where the extended color gamut digital image is a representation of the colors in an original scene.
Claim 15
Dependent Claim
35 words
The method of claim 13 where the limited color gamut digital image is determined by rendering the colors of the original scene to produce rendered color values that are desirable for a first output device.
Claim 16
Dependent Claim
51 words
The method of claim 14 where the residual image is determined by computing the difference between the rendered color values for the first output device and a second set of rendered color values that are desirable for a second output device having a larger color gamut than the first output device.
Claim 17
Dependent Claim
22 words
The method of claim 15 where the larger color gamut output device is a hypothetical output device having an idealized color gamut.
Claim 18
Dependent Claim
29 words
The method of claim 1 where the limited color gamut digital image in the storage color space is stored in a digital image file using a digital storage medium.
Claim 19
Dependent Claim
19 words
The method of claim 17 where the residual image is stored as additional data in the digital image file.
Claim 20
Dependent Claim
31 words
The method of claim 17 where a data compression technique is applied to the residual image before it is stored so that it uses a smaller amount of digital storage memory.
Claim 21
Dependent Claim
31 words
The method of claim 17 where the limited color gamut digital image is stored in the digital image file, and the residual image is stored in a separate digital image file.
Claim 22
Dependent Claim
33 words
The method of claim 1 further including using the residual image together with the limited color gamut digital image in the storage color space to form a reconstructed extended color gamut digital image.
Claim 23
Dependent Claim
46 words
The method of claim 1 further including using the residual image together with the limited color gamut digital image in the storage color space to form a digital image appropriate for display on an output device having a color gamut different that the limited color gamut.
Claim 24
Dependent Claim
20 words
The method of claim 1 where the extended color gamut digital image originates from a scan of a photographic negative.
Claim 25
Dependent Claim
20 words
The method of claim 1 where the extended color gamut digital image originates from a scan of a photographic transparency.
Claim 26
Dependent Claim
20 words
The method of claim 1 where the extended color gamut digital image originates from a scan of a photographic print.
Claim 27
Dependent Claim
17 words
The method of claim 1 where the extended color gamut digital image originates from a digital camera.
Claim 28
Dependent Claim
42 words
The method of claim 1 where the residual image is determined by computing a difference between the extended color gamut digital image represented in an extended storage color space and the limited color gamut digital image represented in the storage color space.
Claim 29
Independent Claim
177 words
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: 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.
Claim 30
Independent Claim
177 words
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: 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.
Claim 31
Dependent Claim
13 words
The method of claim 28 where the desirable modification is interactively user specified.
Claim 32
Dependent Claim
20 words
The method of claim 28 where the desirable modification is determined by applying an automatic algorithm to the digital image.
Claim 33
Independent Claim
168 words
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) 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.
Claim 34
Independent Claim
168 words
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) 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.
Claim 35
Dependent Claim
153 words
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: 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.
Claim 36
Dependent Claim
153 words
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: 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.
Claim 37
Dependent Claim
193 words
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: 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.
Claim 38
Dependent Claim
193 words
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: 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.
Claim 39
Dependent Claim
183 words
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: 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.
Claim 40
Dependent Claim
183 words
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: 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.
References Cited (Backward Citations)
US4417270A
Cited
US4903317A
Cited
US5122873A
Cited
US5050230A
Cited
US5268754A
Cited
US5297219A
Cited
US5317425A
Cited
US5333069A
Cited
US5510910A
Cited
US5539540A
Cited
US5583666A
Cited
US5666215A
Cited
US5528377A
Cited
US5583665A
Cited
US5760386A
Cited
US6043909A
Cited
JPH09312777A
Cited
US5990931A
Cited
US5713062A
Cited
US5892891A
Cited
US5949967A
Cited
WO1999041734A1
Cited
JPH11331622A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2004-08-27 | 2005-02-26 | 2005-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-08-27 | 2009-02-26 | 2009-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-08-27 | 2013-02-26 | 2013-08-28 | $7700.00 | Window Closed / Lapsed |