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    • 3. 发明专利
    • IMAGE PROCESSING METHOD AND IMAGE INPUT DEVICE
    • JPH11164194A
    • 1999-06-18
    • JP32905797
    • 1997-11-28
    • KONISHIROKU PHOTO IND
    • HABU YUSUKE
    • H04N5/243G06T1/00
    • PROBLEM TO BE SOLVED: To perform high speed marginal dimming correction, without the use of cosine fourth-power law by performing marginal dimming correction with the use of a secondary, tertiary, or biquadratic expression regarding image height, so as to correct marginal dimming characteristics of picked-up image data through to a lens. SOLUTION: To correct the marginal dimming characteristics of picked-up image data through to a lens, a marginal dimming correction is made by using a secondary, tertiary, or biquadratic expressing regarding an image height. An image processing part 30 reads in input image data and image relative information (tag information) and stores them temporarily in a frame memory 33. Then the image processing part 30 finds a marginal dimming correction expression from tag information. Then the image processing part 30 performs a gradation conversion with respect to all pixels, with its results being stored in the frame memory 33. Then the image processing part 30 reads image data out of the frame memory 33 and performs marginal dimming correction based upon a specified expression. Consequently, image data having marginal dimming corrected are obtained.