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US6795115B1
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White-balance adjusting apparatus
Assignee: Xacti Corp
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Filing: 2000-08-30
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Granted: 2004-09-21
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Expires: 2020-08-30
Abstract
Abstract A white-balance adjusting apparatus includes a CPU. The CPU integrates R, G, B and Y signals of a subject image on the basis of each of divisional areas of N in number, to determine integration values Rn, Gn and Bn on primary color components and an integration value Yn on a luminance component. Furthermore, the integration values Rn, Gn and Bn are converted into chrominance components. From the chrominance components, integration values RYn and BYn are determined that are removed of a Y component. Meanwhile, a table is written with a numeral “8” related to a monochromatic color and a numeral “1” related to a skin color. The CPU calculates optimal gains α and β, based on the integration values Rn, Gn and Bn, integration values RYn and BYn and table. The optimal gains are given to the R, G and B signals thereby suppressing the skin color component of the subject image from changing.
Inventors
- 👤 Seishin Okazaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 12:08
CPC Classifications
H; H04; H04N; H04N23/00; H04N23/80; H04N23/84; H04N23/88
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
168 words
A white-balance adjusting apparatus for providing an optimal gain to a color information signal corresponding to a subject image thereby adjusting white balance while suppressing a skin color component contained in the color information signal from changing, comprising: a color evaluator for evaluating colors of a predetermined plurality of portions of the subject image based on the color information signal; a luminance evaluator for evaluating luminances of the predetermined plurality of portions based on the color information signal; a remover for removing a plurality of luminance evaluation components given by said luminance evaluator respectively from a plurality of color evaluation components provided by said color evaluator; a table having a first numeral related to a monochromatic color and a second numeral related at least to a skin color; a detector for detecting from the table respective numerals related to the components removed by said remover; and an optimal gain calculator for calculating the optimal gain based on the numerals detected by said detector and the color evaluation components.
Claim 2
Dependent Claim
168 words
A white-balance adjusting apparatus for providing an optimal gain to a color information signal corresponding to a subject image thereby adjusting white balance while suppressing a skin color component contained in the color information signal from changing, comprising: a color evaluator for evaluating colors of a predetermined plurality of portions of the subject image based on the color information signal; a luminance evaluator for evaluating luminances of the predetermined plurality of portions based on the color information signal; a remover for removing a plurality of luminance evaluation components given by said luminance evaluator respectively from a plurality of color evaluation components provided by said color evaluator; a table having a first numeral related to a monochromatic color and a second numeral related at least to a skin color; a detector for detecting from the table respective numerals related to the components removed by said remover; and an optimal gain calculator for calculating the optimal gain based on the numerals detected by said detector and the color evaluation components.
Claim 3
Dependent Claim
57 words
A white-balance adjusting apparatus according to claim 1 , wherein said optimal gain calculator includes a first gain calculator to calculate a first gain based on the color evaluation components and a weighter to give weighting to each of the first gain and a predetermined second gain based on the detected numerals and determine the optimal gain.
Claim 4
Dependent Claim
45 words
A white-balance adjusting apparatus according to claim 2 , the second gain is always equal to or smaller than the first gain, and the weighter increasing the weighting to the second gain with increase of a ratio of the second numeral to the detected numerals.
Claim 5
Dependent Claim
70 words
A white-balance adjusting apparatus according to claim 2 , wherein said first gain calculator includes a specifier to specify the removal component related to the monochromatic color and the skin color from among the removal components, an activator to activate the color evaluation component corresponding to the removal component specified said specifier, and a calculator to calculate the first gain based on the color evaluation component activated by said activator.
Claim 6
Dependent Claim
18 words
A white-balance adjusting apparatus according to claim 1 , wherein the second numeral is related also to green.
Claim 7
Dependent Claim
85 words
A white-balance adjusting apparatus according to claim 1 , wherein the table further has a third numeral related to other colors than the monochromatic color and the skin color, the first numeral being greater than the second numeral, the second numeral being greater than the third numeral, and said optimal gain calculator including a multiplier to multiply the detected numerals respectively by the color evaluation components and a calculator to calculate the optimal gain based on a plurality of multiplication values given by said multiplier.
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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) | 2007-09-21 | 2008-03-22 | 2008-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2011-09-21 | 2012-03-22 | 2012-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2015-09-21 | 2016-03-22 | 2016-09-21 | $7700.00 | Window Closed / Lapsed |