| 摘要 |
PROBLEM TO BE SOLVED: To provide picture processing technology for preventing the deterioration of a picture due to a white skip while a desired picture processing is secured. SOLUTION: In sharpness correction with respect to the picture constituted of a pixel array, the picture processing is performed by an unsharp mask, for example. The pixel values Hji of respective pixels after sharpness correction are converted into pixel values H'ij in accordance with a function Fn. The conversion function Fn is obtained by connecting linear functions F1 and F2 in a point P (230, 230). The linear function F2 is the straight line of H'ij= Th(230) and the threshold Th becomes the pixel value of a gray area. The pixel value after the processing, which exceeds the threshold Th, is suppressed to the pixel value Th of the gray area independent of sharpness correction. Consequently, the white skip can be prevented while the desired picture processing is secured. |
