| 摘要 |
This invention provides an image processing apparatus which simplifies the circuit arrangement required for edge emphasis correction. For this purpose, the apparatus has a first color conversion unit ( 102 ) for color-separating input image data into lightness data and chromaticity data, a delay unit ( 103 ) for delaying the separated lightness data by N lines, and delaying the chromaticity data by N/2 lines, an image edge amount extraction unit ( 113 ) for extracting an image edge portion from the lightness data, a saturation amount extraction unit ( 114 ) for extracting the saturation component from the chromaticity data, and an image edge emphasis amount distribution unit ( 116 ) for distributing the emphasis amount of the edge portion to an edge emphasis unit ( 104 ) so that the distribution ratio for chromaticity correction is higher than that for lightness correction when the saturation component extracted by the saturation extraction unit ( 114 ) is large, and the distribution ratio for lightness correction is higher than that for chromaticity correction when the saturation component extracted by the saturation extraction unit ( 114 ) is small. |
