US5475769A
Expired / Lapsed
US
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Method and apparatus for recovering image data through the use of a color test pattern
Assignee: Intellectual Ventures I LLC
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Filing: 1994-08-29
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Granted: 1995-12-12
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Expires: 2014-08-29
Abstract
Abstract A method and apparatus are presented for processing a set of image data points representing an image and being detected by a detector array having array elements wherein each array element is responsive to only one of a first or a second color. The method includes the steps of generating a color test pattern; detecting actual output responses for at least one neighborhood of detector array elements corresponding to pixels in the color test pattern, where each neighborhood has a given array element responsive to the first color; measuring the response to the color test pattern of the second color of the given array element of each neighborhood of array elements, that is responsive to the first color, to determine the actual color content in the color test pattern that is responsible for the actual output response of the given array element; determining a set of weighting values which relate the actual color contents of the test pattern with the actual output responses to the test pattern; storing the set of weighting values; detecting actual output responses for a subject image for each neighborhood; and determining actual color contents, responsive to the second color for the given array element of each neighborhood corresponding to pixels in the subject image, which actual color contents of the subject image are related to the actual output responses of the subject image by the stored weighting values.
Inventors
- 👤 Munib A. Wober
- 👤 F. Richard Soini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 17:46
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/64; H04N9/646; H04N23/00; H04N23/80; H04N23/84; H04N23/843; H04N25/00; H04N25/10; H04N25/17; H04N2209/00; H04N2209/04; H04N2209/041; H04N2209/042; H04N2209/045; H04N2209/046
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
225 words
A method for processing a set of image data points representing an image and being detected by a detector array comprising array elements wherein each array element is responsive to only one of a first color and a second color, said method comprising the steps of: generating a color test pattern comprising said first and second colors; detecting, with said detector array, first actual output responses for at least one neighborhood of array elements, said neighborhood of array elements being responsive to corresponding pixels in the color test pattern, where each said neighborhood has a given array element responsive to the first color; measuring the second color of the given array element of each said neighborhood of array elements in the color test pattern to determine a first actual color content related to the given array element; determining a set of weighting values which relate said determined first actual color contents with the first actual output responses; storing the set of weighting values; detecting, with said detector array, second actual output responses of each said neighborhood to a subject image; and determining second actual color contents, responsive to said second color of said given array element of each said neighborhood corresponding to pixels in the subject image, which second actual color contents are related to the second actual output responses by the stored weighting values.
Claim 2
Independent Claim
225 words
A method for processing a set of image data points representing an image and being detected by a detector array comprising array elements wherein each array element is responsive to only one of a first color and a second color, said method comprising the steps of: generating a color test pattern comprising said first and second colors; detecting, with said detector array, first actual output responses for at least one neighborhood of array elements, said neighborhood of array elements being responsive to corresponding pixels in the color test pattern, where each said neighborhood has a given array element responsive to the first color; measuring the second color of the given array element of each said neighborhood of array elements in the color test pattern to determine a first actual color content related to the given array element; determining a set of weighting values which relate said determined first actual color contents with the first actual output responses; storing the set of weighting values; detecting, with said detector array, second actual output responses of each said neighborhood to a subject image; and determining second actual color contents, responsive to said second color of said given array element of each said neighborhood corresponding to pixels in the subject image, which second actual color contents are related to the second actual output responses by the stored weighting values.
Claim 3
Dependent Claim
17 words
The method of claim 1, wherein the color test pattern is a spectrally decorrelated color noise image.
Claim 4
Dependent Claim
36 words
The method of claim 1, wherein said neighborhood comprises a center array element and the array elements surrounding and adjacent to the center array element, and wherein the center array element is the given array element.
Claim 5
Dependent Claim
16 words
The method of claim 3, wherein the color test pattern is a three color repeating pattern.
Claim 6
Dependent Claim
19 words
The method of claim 4, wherein the three color repeating pattern is Red (R), Green (G) and Blue (B).
Claim 7
Dependent Claim
15 words
The method of claim 1, wherein said neighborhood comprises a 3×3 array of array elements.
Claim 8
Dependent Claim
61 words
The method of claim 1, wherein each said array element is responsive to only one of the first color, the second color and a third color, and wherein said at least one neighborhood is represented as only one of: ##STR4## and wherein R represents a red color detector, G represents a green color detector and B represents a blue color detector.
Claim 9
Dependent Claim
13 words
The method of claim 11, wherein said color test pattern is spectrally blurred.
Claim 10
Dependent Claim
21 words
The method of claim 1, wherein said step of determining weighting values further comprises the step of optimizing said weighting values.
Claim 11
Dependent Claim
28 words
The method of claim 9, wherein said step of determining weighting values further comprises the step of optimizing said weighting values using a linear minimum mean square error.
Claim 12
Dependent Claim
50 words
The method of claim 1, wherein the step of determining a set of weighting values solves the matrix equation A*W=X wherein A is a matrix representing said actual output responses, W is a matrix representing said set of weighting values, and X is a matrix representing said actual color contents.
Claim 13
Independent Claim
229 words
An apparatus for processing a set of image data points representing an image, said apparatus comprising: an image generator for generating a color test pattern comprising a plurality of colors; a detector array comprising array elements each responsive to a first color of the plurality of colors, said detector array detecting first actual output responses for at least one neighborhood of array elements, said neighborhood of array elements being responsive to corresponding pixels in the color test pattern, where each said neighborhood has a given array element responsive to the first color; means for measuring a second color of the plurality of colors of the given array element of each said neighborhood of array elements in the color test pattern to determine a first actual color content related to the given array element; means for determining a set of weighting values which relate said determined first actual color contents with the first actual output responses; means for storing the set of weighting values; means for detecting, with said detector array, second actual output responses of each said neighborhood to a subject image; and means for determining second actual color contents, responsive to said second color of said given array element of each said neighborhood corresponding to pixels in the subject image, which second actual color contents are related to the second actual output responses by the stored weighting values.
Claim 14
Independent Claim
229 words
An apparatus for processing a set of image data points representing an image, said apparatus comprising: an image generator for generating a color test pattern comprising a plurality of colors; a detector array comprising array elements each responsive to a first color of the plurality of colors, said detector array detecting first actual output responses for at least one neighborhood of array elements, said neighborhood of array elements being responsive to corresponding pixels in the color test pattern, where each said neighborhood has a given array element responsive to the first color; means for measuring a second color of the plurality of colors of the given array element of each said neighborhood of array elements in the color test pattern to determine a first actual color content related to the given array element; means for determining a set of weighting values which relate said determined first actual color contents with the first actual output responses; means for storing the set of weighting values; means for detecting, with said detector array, second actual output responses of each said neighborhood to a subject image; and means for determining second actual color contents, responsive to said second color of said given array element of each said neighborhood corresponding to pixels in the subject image, which second actual color contents are related to the second actual output responses by the stored weighting values.
Claim 15
Dependent Claim
47 words
The apparatus of claim 12, wherein the means for determining weighting values solves the matrix equation A*W=X wherein A is a matrix representing said actual output responses, W is a matrix representing said set of weighting values, and X is a matrix representing said actual color contents.
Claim 16
Dependent Claim
17 words
The apparatus of claim 12, wherein said neighborhood is represented as a 3×3 array of array elements.
Claim 17
Dependent Claim
13 words
The apparatus of claim 12, wherein the color test pattern is spectrally decorrelated.
Claim 18
Dependent Claim
13 words
The apparatus of claim 12, wherein said color test pattern is spectrally blurred.
Claim 19
Dependent Claim
26 words
The apparatus of claim 12, wherein said means for determining weighting values further comprises means for determining optimum weighting values using linear minimum mean square error.
Claim 20
Dependent Claim
16 words
The apparatus of claim 12, wherein the color test pattern is a three color repeating pattern.
Claim 21
Dependent Claim
19 words
The apparatus of claim 18, wherein the three color repeating pattern is Red (R), Green (G) and Blue (B).
Claim 22
Dependent Claim
61 words
The apparatus of claim 12, wherein each said array element is responsive to only one of the first color, the second color and a third color, and wherein said at least one neighborhood is represented as only one of: ##STR5## and wherein R represents a red color detector, G represents a green color detector, and B represents a blue color detector.
Claim 23
Dependent Claim
21 words
The apparatus of claim 12, wherein said step of determining weighting values further comprises the step of optimizing said weighting values.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-12-11 | 1999-06-12 | 1999-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-12-11 | 2003-06-12 | 2003-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-12-11 | 2007-06-12 | 2007-12-12 | $7700.00 | Window Closed / Lapsed |