| 摘要 |
PROBLEM TO BE SOLVED: To suppress the first pixel from becoming too dark when a cutoff coefficient (k) is a small value and unnatural graduation at a boundary where a (k) value changes largely in a method for expressing the effect of out-of-focus by operating a maximum frequency included in the image data of a sampling frequency. SOLUTION: When the first pixel of each line is processed, the memory value of a filter is set so that the output value of the filter can be equal to the pixel value of input pixel data and then, filter processing is performed. Also, when a cutoff coefficient (k) value between pixels changes largely so that there is a possibility of causing unnaturalness, in the case a graduation processing object pixel is defined as an output y1 when a filter parameter is defined as A1 before vignette processing and the graduation processing object pixel is defined as an output y2 when a processed filter parameter is defined as A2, a target output when the filter parameter is processed with A2 and a filter memory value are set so that y1 can be (y1+y2)/2. |
