| 摘要 |
PROBLEM TO BE SOLVED: To provide a point defect detection method by which a point defect can be detected without the need for any exclusive circuit and that is used for a picture signal processor. SOLUTION: A digital still camera picks up a light emitted from a color viewer (processing 16). A CPU 10 divides picture data into a plurality of blocks and divides each block by each color of complementary group color filters provided to an entire face of each pixel of a CCD (processing 17). Comparison between a mean value of a block to which a target pixel belongs and a pixel value of the target pixel is made to all pixels of the picture data, and when the pixel value of the target pixel is smaller than the mean value by 20% or over (YES in processing 19), a count of a detected number counter (not shown) is incremented by one (processing 20) and a temporary storage memory 7 temporarily stores a pixel position (address) of a detected pixel (point defect) (processing 21).
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