| 摘要 |
PURPOSE: A contrast correction device of an image and a method using a weighted value corresponding to brightness of luminance and a lamp mask are provided to increase illumination of a bright area and a dark area. CONSTITUTION: An input color space conversion unit(110) converts a color space of an input image into a color space formed by a luminance signal and a chrominance signal. A lamp mask production unit(120) generates a lamp mask from input luminance signals. An illumination correction processing unit(130) generates an output luminance signal which illumination is corrected. A chrominance signal correction unit(140) generates an output chrominance signal with corrected chroma. [Reference numerals] (110) Input color space conversions unit; (120) Lamp mask production unit; (121) Low-pass filter processing module; (122) Weighted value processing module; (130) Illumination correction processing unit; (131) First illumination correction processing unit; (132) Second illumination correction processing unit; (140) Chrominance signal correction unit; (150) Output color space conversion unit; (AA) First brightness signal; (BB) Second brightness signal; (CC) Output brightness signal; (DD) Input image; (EE) Input brightness signal; (FF) Input chrominance signal; (GG) Output image |
