AUTOMATIC COLOR TONE CORRECTOR

摘要

PURPOSE:To unify the prescribed areas such as the backgrounds, etc., of plural photos into the same color tone in an extremely easy and exact way. CONSTITUTION:An image storage means 11 stores the images of plural types as the image data. A selector means 12 designates an image of a standard color tone and an image of a color tone to be corrected and then takes out these images out of the means 11 as a reference image and a processing subject image respectively. A histogram producer means 13 produces a cumulative histogram of density for each color component from the image data on the reference image and the processing subject image. A comparator means 14 compares these cumulative histograms with each other for each color component. Then a tone changing means 16 corrects the cumulative histogram of each color component of the processing subject image into the cumulative histogram of the reference image based on the comparison data given from the means 14 and then outputs the corrected histogram as the image data.