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US6046723A
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Method and apparatus for achieving color-appearance matching for an image viewed in surrounds of different relative luminances
Assignee: Monument Peak Ventures LLC
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Filing: 1997-11-17
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Granted: 2000-04-04
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Expires: 2017-11-17
Abstract
Abstract A method for achieving color-appearance matching for an image viewed in different surround conditions, the method comprises the steps of forming signals representing an original image; and mapping the original image signals through a transformation that alters image luminance contrast by a factor of substantially 1.01 to 1.15 for an original image viewed in a light surround to a reproduced image to be viewed in an average surround; substantially 1.01 to 1.22 for an original image viewed in a light surround to a reproduced image to be viewed in dim surround; substantially a range of 1.01 to 1.29 for an original image viewed in a light surround to a reproduced image to be viewed in an dark surround; substantially a range of 1.01 to 1.11 for an original image viewed in an average surround to a reproduced image to be viewed in an dim surround; substantially a range of 1.01 to 1.22 for an original image viewed in an average surround to a reproduced image to be viewed in an dark surround; and substantially a range of 1.01 to 1.21 for an original image viewed in an dim surround to a reproduced image to be viewed in an dark surround for achieving color-appearance matching of a reproduced image to the original image.
Inventors
- 👤 Cathleen M. Daniels
- 👤 Edward J. Giorgianni
- 👤 Mark D. Fairchild
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:28
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/46; H04N1/56; H04N1/60; H04N1/6083; H04N1/6088; H04N1/6011
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
378 words
A method for achieving color-appearance matching for an image to be viewed in different surrounds, the method comprising the steps of: (a) Forming signals representing an original image; and (b) mapping the original image signals through a transformation that alters image luminance contrast by a factor of substantially 1.01 to 1.15 for an original image viewed in a light surround to a reproduced image to be viewed in an average surround; substantially 1.01 to 1.22 for an original image viewed in a light surround to a reproduced image to be viewed in a dim surround; substantially a range of 1.01 to 1.29 for an original image viewed in a light surround to a reproduced image to be viewed in a dark surround; substantially a range of 1.01 to 1.11 for an original image viewed in an average surround to a reproduced image to be viewed in a dim surround; substantially a range of 1.01 to 1.22 for an original image viewed in an average surround to a reproduced image to be viewed in a dark surround; substantially a range of 1.01 to 1.21 for an original image viewed in a dim surround to a reproduced image to be viewed in a dark surround; substantially a range of 0.87 to 0.99 for an original image viewed in an average surround to a reproduced image to be viewed in a light surround; substantially a range of 0.82 to 0.99 for an original image viewed in a dim surround to a reproduced image to be viewed in a light surround; substantially a range of 0.90 to 0.99 for an original image viewed in a dim surround to a reproduced image to be viewed in an average surround; substantially a range of 0.78 to 0.99 for an original image viewed in a dark surround to a reproduced image to be viewed in a light surround; substantially a range of 0.82 to 0.99 for an original image viewed in a dark surround to a reproduced image to be viewed in an average surround; and substantially a range of 0.83 to 0.99 for an original image viewed in a dark surround to a reproduced image to be viewed in a dim surround for achieving color-appearance matching of a reproduced image to the original image.
Claim 2
Independent Claim
378 words
A method for achieving color-appearance matching for an image to be viewed in different surrounds, the method comprising the steps of: (a) Forming signals representing an original image; and (b) mapping the original image signals through a transformation that alters image luminance contrast by a factor of substantially 1.01 to 1.15 for an original image viewed in a light surround to a reproduced image to be viewed in an average surround; substantially 1.01 to 1.22 for an original image viewed in a light surround to a reproduced image to be viewed in a dim surround; substantially a range of 1.01 to 1.29 for an original image viewed in a light surround to a reproduced image to be viewed in a dark surround; substantially a range of 1.01 to 1.11 for an original image viewed in an average surround to a reproduced image to be viewed in a dim surround; substantially a range of 1.01 to 1.22 for an original image viewed in an average surround to a reproduced image to be viewed in a dark surround; substantially a range of 1.01 to 1.21 for an original image viewed in a dim surround to a reproduced image to be viewed in a dark surround; substantially a range of 0.87 to 0.99 for an original image viewed in an average surround to a reproduced image to be viewed in a light surround; substantially a range of 0.82 to 0.99 for an original image viewed in a dim surround to a reproduced image to be viewed in a light surround; substantially a range of 0.90 to 0.99 for an original image viewed in a dim surround to a reproduced image to be viewed in an average surround; substantially a range of 0.78 to 0.99 for an original image viewed in a dark surround to a reproduced image to be viewed in a light surround; substantially a range of 0.82 to 0.99 for an original image viewed in a dark surround to a reproduced image to be viewed in an average surround; and substantially a range of 0.83 to 0.99 for an original image viewed in a dark surround to a reproduced image to be viewed in a dim surround for achieving color-appearance matching of a reproduced image to the original image.
Claim 3
Dependent Claim
16 words
The method as in claim 1, wherein the mapping function is implemented via a digital transform.
Claim 4
Dependent Claim
26 words
The method as in claim 2, wherein step (a) includes creating a digital representation of the scene so that the original image is in digital form.
Claim 5
Dependent Claim
26 words
The method as in claim 1 further comprising the step of converting the original image to RLAB color space for facilitating the mapping of step (b).
Claim 6
Independent Claim
375 words
An apparatus for achieving color-appearance matching for an image viewed in different surrounds, comprising: (a) means for forming signals representing an original image; and (b) means for mapping the original image signals through a transformation that alters image luminance contrast by a factor of substantially 1.01 to 1.15 for an original image viewed in a light surround to a reproduced image to be viewed in an average surround; substantially 1.01 to 1.22 for an original image viewed in a light surround to a reproduced image to be viewed in a dim surround; substantially a range of 1.01 to 1.29 for an original image viewed in a light surround to a reproduced image to be viewed in a dark surround; substantially a range of 1.01 to 1.11 for an original image viewed in an average surround to a reproduced image to be viewed in a dim surround; substantially a range of 1.01 to 1.22 for an original image viewed in an average surround to a reproduced image to be viewed in a dark surround; substantially a range of 1.01 to 1.21 for an original image viewed in a dim surround to a reproduced image to be viewed in a dark surround; substantially a range of 0.87 to 0.99 for an original image viewed in an average surround to a reproduced image to be viewed in a light surround; substantially a range of 0.82 to 0.99 for an original image viewed in a dim surround to a reproduced image to be viewed in a light surround; substantially a range of 0.90 to 0.99 for an original image viewed in a dim surround to a reproduced image to be viewed in an average surround; substantially a range of 0.78 to 0.99 for an original image viewed in a dark surround to a reproduced image to be viewed in a light surround; substantially a range of 0.82 to 0.99 for an original image viewed in a dark surround to a reproduced image to be viewed in an average surround; and substantially a range of 0.83 to 0.99 for an original image viewed in a dark surround to a reproduced image to be viewed in a dim surround for achieving color-appearance matching of a reproduced image to the original image.
Claim 7
Independent Claim
375 words
An apparatus for achieving color-appearance matching for an image viewed in different surrounds, comprising: (a) means for forming signals representing an original image; and (b) means for mapping the original image signals through a transformation that alters image luminance contrast by a factor of substantially 1.01 to 1.15 for an original image viewed in a light surround to a reproduced image to be viewed in an average surround; substantially 1.01 to 1.22 for an original image viewed in a light surround to a reproduced image to be viewed in a dim surround; substantially a range of 1.01 to 1.29 for an original image viewed in a light surround to a reproduced image to be viewed in a dark surround; substantially a range of 1.01 to 1.11 for an original image viewed in an average surround to a reproduced image to be viewed in a dim surround; substantially a range of 1.01 to 1.22 for an original image viewed in an average surround to a reproduced image to be viewed in a dark surround; substantially a range of 1.01 to 1.21 for an original image viewed in a dim surround to a reproduced image to be viewed in a dark surround; substantially a range of 0.87 to 0.99 for an original image viewed in an average surround to a reproduced image to be viewed in a light surround; substantially a range of 0.82 to 0.99 for an original image viewed in a dim surround to a reproduced image to be viewed in a light surround; substantially a range of 0.90 to 0.99 for an original image viewed in a dim surround to a reproduced image to be viewed in an average surround; substantially a range of 0.78 to 0.99 for an original image viewed in a dark surround to a reproduced image to be viewed in a light surround; substantially a range of 0.82 to 0.99 for an original image viewed in a dark surround to a reproduced image to be viewed in an average surround; and substantially a range of 0.83 to 0.99 for an original image viewed in a dark surround to a reproduced image to be viewed in a dim surround for achieving color-appearance matching of a reproduced image to the original image.
Claim 8
Dependent Claim
16 words
The apparatus as in claim 5, wherein the mapping function is implemented via a digital transform.
Claim 9
Dependent Claim
29 words
The apparatus as in claim 6, wherein said forming means includes means for creating a digital representation of the scene so that the original image is in digital form.
Claim 10
Dependent Claim
25 words
The apparatus as in claim 5 further comprising means for converting the original image to RLAB color space for facilitating the mapping of step (b).
Claim 11
Dependent Claim
389 words
A computer program product for achieving color-appearance matching for an image viewed in different surrounds, comprising: a computer readable storage medium having a computer program stored thereon for performing the steps of: (a) forming signals representing an original image; and (b) mapping the original image signals through a transformation that alters image luminance contrast by a factor of substantially 1.01 to 1.15 for an original image viewed in a light surround to a reproduced image to be viewed in an average surround; substantially 1.01 to 1.22 for an original image viewed in a light surround to a reproduced image to be viewed in a dim surround; substantially a range of 1.01 to 1.29 for an original image viewed in a light surround to a reproduced image to be viewed in a dark surround; substantially a range of 1.01 to 1.11 for an original image viewed in an average surround to a reproduced image to be viewed in a dim surround; substantially a range of 1.01 to 1.22 for an original image viewed in an average surround to a reproduced image to be viewed in a dark surround; substantially a range of 1.01 to 1.21 for an original image viewed in a dim surround to a reproduced image to be viewed in a dark surround; substantially a range of 0.87 to 0.99 for an original image viewed in an average surround to a reproduced image to be viewed in a light surround; substantially a range of 0.82 to 0.99 for an original image viewed in a dim surround to a reproduced image to be viewed in a light surround; substantially a range of 0.90 to 0.99 for an original image viewed in a dim surround to a reproduced image to be viewed in an average surround; substantially a range of 0.78 to 0.99 for an original image viewed in a dark surround to a reproduced image to be viewed in a light surround; substantially a range of 0.82 to 0.99 for an original image viewed in a dark surround to a reproduced image to be viewed in an average surround; and substantially a range of 0.83 to 0.99 for an original image viewed in a dark surround to a reproduced image to be viewed in a dim surround for achieving color-appearance matching of a reproduced image to the original image.
Claim 12
Dependent Claim
389 words
A computer program product for achieving color-appearance matching for an image viewed in different surrounds, comprising: a computer readable storage medium having a computer program stored thereon for performing the steps of: (a) forming signals representing an original image; and (b) mapping the original image signals through a transformation that alters image luminance contrast by a factor of substantially 1.01 to 1.15 for an original image viewed in a light surround to a reproduced image to be viewed in an average surround; substantially 1.01 to 1.22 for an original image viewed in a light surround to a reproduced image to be viewed in a dim surround; substantially a range of 1.01 to 1.29 for an original image viewed in a light surround to a reproduced image to be viewed in a dark surround; substantially a range of 1.01 to 1.11 for an original image viewed in an average surround to a reproduced image to be viewed in a dim surround; substantially a range of 1.01 to 1.22 for an original image viewed in an average surround to a reproduced image to be viewed in a dark surround; substantially a range of 1.01 to 1.21 for an original image viewed in a dim surround to a reproduced image to be viewed in a dark surround; substantially a range of 0.87 to 0.99 for an original image viewed in an average surround to a reproduced image to be viewed in a light surround; substantially a range of 0.82 to 0.99 for an original image viewed in a dim surround to a reproduced image to be viewed in a light surround; substantially a range of 0.90 to 0.99 for an original image viewed in a dim surround to a reproduced image to be viewed in an average surround; substantially a range of 0.78 to 0.99 for an original image viewed in a dark surround to a reproduced image to be viewed in a light surround; substantially a range of 0.82 to 0.99 for an original image viewed in a dark surround to a reproduced image to be viewed in an average surround; and substantially a range of 0.83 to 0.99 for an original image viewed in a dark surround to a reproduced image to be viewed in a dim surround for achieving color-appearance matching of a reproduced image to the original image.
Claim 13
Dependent Claim
18 words
The computer program product as in claim 9, wherein the mapping function is implemented via a digital transform.
Claim 14
Dependent Claim
28 words
The computer program product as in claim 10, wherein step (a) includes creating a digital representation of the scene so that the original image is in digital form.
Claim 15
Dependent Claim
28 words
The computer program product as in claim 9 further comprising the step of converting the original image to RLAB color space for facilitating the mapping of step (b).
References Cited (Backward Citations)
US5447811A
Cited
US5528339A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-04-04 | 2003-10-04 | 2004-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-04-04 | 2007-10-04 | 2008-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-04-04 | 2011-10-04 | 2012-04-04 | $7700.00 | Window Closed / Lapsed |