Reproduction circuit for skin color in video signals
Abstract
Abstract A skin-color-area detector detects skin-color-area in one frame from input video signals, and outputs it. An average luminance level detector detects an average luminance level in one frame from luminance signals of the video signals, and output it. These two outputs are fed to a skin-color-corrector, wherein these inputs representing condition of video signals are calculated to produce skin-color-correction signals responding to the input signals. At a saturation controller and at a luminance signal corrector, a skin-color is optimumly corrected in the manner of responding to the input video signals by the outputs from the skin-color-corrector. Thereby reproduction quality of skin-color signals in video signals are enhanced. Instead of the skin-color-area detector, an average skin-color-luminance-level detector which detects an average luminance level in one frame from color difference signals and luminance signals of the video signals can be used, and the output of the average skin-color-luminance-level detector can be applied to the skin-color-corrector. Not only either one, but also both the skin-color-area detector and the average skin-color-luminance-level detector also can be used, and the outputs from both detectors in addition to an output of an average luminance level detector can be fed to the skin-color-corrector.
Inventors
- 👤 Masahiro Takeshima
Bibliographic Details
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