US5585860A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reproduction circuit for skin color in video signals
Assignee: Panasonic Holdings Corp
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Filing: 1995-04-12
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Granted: 1996-12-17
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Expires: 2015-04-12
Abstract
Abstract A skin-color-area detector generates a skin-color-area signal from an input video signal. An average luminance level detector generates an average luminance level signal from a luminance signal. These signals are transmitted to a skin-color-corrector to generate skin-color-correction signals. At a saturation controller and at a luminance signal corrector which each receive the skin color corrections signals, skin-color is optimumly corrected. Thereby reproduction quality of skin-color signals in video signals is enhanced.
Inventors
- 👤 Masahiro Takeshima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 10:40
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/64; H04N9/643; H04N5/00; H04N5/14; H04N5/20
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
145 words
Means for enhancing skin color in an image which corresponds to a video signal which includes a plurality of color difference signals and a luminance signal, comprising: skin-color-area detector means for generating a skin color component area signal from said plurality of color difference signals; average luminance-level detector means for generating an average luminance level signal from said luminance signal; skin-color corrector means for receiving said skin color component area signal and said average luminance level signal and for generating a skin-color-correction signal; saturation controller means for receiving said skin-color-correction signal and said plurality of color difference signals and for generating a plurality of modified color difference signals which correspond to said image with enhanced skin color; luminance corrector means for receiving said skin-color-correction signal and said luminance signal and for generating a modified luminance signal which corresponds to said image with enhanced skin color.
Claim 2
Dependent Claim
145 words
Means for enhancing skin color in an image which corresponds to a video signal which includes a plurality of color difference signals and a luminance signal, comprising: skin-color-area detector means for generating a skin color component area signal from said plurality of color difference signals; average luminance-level detector means for generating an average luminance level signal from said luminance signal; skin-color corrector means for receiving said skin color component area signal and said average luminance level signal and for generating a skin-color-correction signal; saturation controller means for receiving said skin-color-correction signal and said plurality of color difference signals and for generating a plurality of modified color difference signals which correspond to said image with enhanced skin color; luminance corrector means for receiving said skin-color-correction signal and said luminance signal and for generating a modified luminance signal which corresponds to said image with enhanced skin color.
Claim 3
Dependent Claim
141 words
Means for enhancing skin color in an image which corresponds to a video signal which includes a plurality of color difference signals and a luminance signal, comprising: average skin-color-luminance-level detector means for generating an average skin-color-luminance-level signal from said plurality of color difference signals and said luminance signal; average-luminance-level detector means for generating an average-luminance-level signal from said luminance signal; skin-color corrector means for receiving said average skin-color-luminance-level signal and said average-luminance-level signal and for generating a skin-color-correction signal; saturation controller means for receiving said skin-color-correction signal and said plurality of color difference signals and for generating a plurality of modified color difference signals which correspond to said image with enhanced skin color; luminance corrector means for receiving said skin-color-correction signal and said luminance signal and for generating a modified luminance signal which corresponds to said image with enhanced skin color.
Claim 4
Dependent Claim
141 words
Means for enhancing skin color in an image which corresponds to a video signal which includes a plurality of color difference signals and a luminance signal, comprising: average skin-color-luminance-level detector means for generating an average skin-color-luminance-level signal from said plurality of color difference signals and said luminance signal; average-luminance-level detector means for generating an average-luminance-level signal from said luminance signal; skin-color corrector means for receiving said average skin-color-luminance-level signal and said average-luminance-level signal and for generating a skin-color-correction signal; saturation controller means for receiving said skin-color-correction signal and said plurality of color difference signals and for generating a plurality of modified color difference signals which correspond to said image with enhanced skin color; luminance corrector means for receiving said skin-color-correction signal and said luminance signal and for generating a modified luminance signal which corresponds to said image with enhanced skin color.
Claim 5
Dependent Claim
164 words
Means for enhancing skin color in an image which corresponds to a video signal which includes a plurality of color difference signals and a luminance signal, comprising: skin-color-area detector means for generating a skin color component area signal from said plurality of color difference signals; average skin-color-luminance-level detector means for generating an average skin-color-luminance-level signal from said plurality of color difference signals and said luminance signal; average-luminance-level detector means for generating an average-luminance-level signal from said luminance signal; skin-color-corrector means for receiving said skin-color-component area signal, said average skin-color-luminance-level signal, and said average luminance level signal and for generating a skin-color-correction signal; saturation controller means for receiving said skin-color-correction signal and said plurality of color difference signals and for generating a plurality of modified color difference signals which correspond to said image with enhanced skin color; luminance corrector means for receiving said skin-color-correction signal and said luminance signal and for generating a modified luminance signal which corresponds to said image with enhanced skin color.
Claim 6
Dependent Claim
164 words
Means for enhancing skin color in an image which corresponds to a video signal which includes a plurality of color difference signals and a luminance signal, comprising: skin-color-area detector means for generating a skin color component area signal from said plurality of color difference signals; average skin-color-luminance-level detector means for generating an average skin-color-luminance-level signal from said plurality of color difference signals and said luminance signal; average-luminance-level detector means for generating an average-luminance-level signal from said luminance signal; skin-color-corrector means for receiving said skin-color-component area signal, said average skin-color-luminance-level signal, and said average luminance level signal and for generating a skin-color-correction signal; saturation controller means for receiving said skin-color-correction signal and said plurality of color difference signals and for generating a plurality of modified color difference signals which correspond to said image with enhanced skin color; luminance corrector means for receiving said skin-color-correction signal and said luminance signal and for generating a modified luminance signal which corresponds to said image with enhanced skin color.
Claim 7
Dependent Claim
41 words
Means for enhancing skin color in an image which corresponds to a video signal according to claim 1, wherein each of said skin-color-correction signal, and said average luminance level signal is one of a voltage Signal and an electric current signal.
Claim 8
Dependent Claim
45 words
Means for enhancing skin color in an image which corresponds to a video signal according to claim 2, wherein each of said skin-color-correction signal, said average skin-color-luminance-level signal, and said average luminance level signal is one of a voltage signal and an electric current signal.
Claim 9
Dependent Claim
45 words
Means for enhancing skin color in an image which corresponds to a video signal according to claim 3, wherein each of said skin-color-correction signal, said average skin-color-luminance-level signal, and said average luminance level signal is one of a voltage signal and an electric current signal.
Claim 10
Dependent Claim
46 words
Means for enhancing skin color in an image which corresponds to a video signal according to claim 1, wherein each of said skin-color-correction signal and said average luminance level signal is generated for one of a single frame and a single field of said video signal.
Claim 11
Dependent Claim
51 words
Means for enhancing skin color in an image which corresponds to a video signal according to claim 2, wherein each of said skin-color correction signal, said average skin-color-luminance level signal and said average luminance-level signal is generated for one of a single frame and a single field of said video signal.
Claim 12
Dependent Claim
49 words
Means for enhancing skin color in an image corresponds to a video signal according to claim 3, wherein each of said skin-color correction signal, said average skin-color-luminance-level signal and said average luminance-level signal is generated for one of a single frame and a single field of said video signal.
References Cited (Backward Citations)
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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) | 1999-12-17 | 2000-06-17 | 2000-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-12-17 | 2004-06-17 | 2004-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-12-17 | 2008-06-17 | 2008-12-17 | $7700.00 | Window Closed / Lapsed |