Colour processing method, colour processing appts. and storage medium

Abstract

A representative color calculation section calculates a representative color representing a region, which is a subject of color adjustment in an input image. A color adjustment distance calculation section calculates, as a color adjustment distance, a Euclidean distance on a color space between the representative color calculated by the representative color calculation section and a given target color. A reproduction color calculation section calculates a reproduction color expressing the adjusted color of the region, which is the subject of the color adjustment, in such a manner that the colors of the region is adjusted on the basis of the color adjustment distance so that the colors of the region is adjusted little when the color adjustment distance is long, but the color of the region is brought near to the target color when the color adjustment distance is short.

Description

technical field [0001] The present invention relates to a technique for optimally adjusting the color of a specific area in a color image. Specifically, the present invention relates to a method for adjusting the reproduced color after adjustment according to the memory color to be adjusted in a natural image including a memory color that is memorized as an image impression, such as skin color, sky blue, or grass green. A technique for making a decision and reproducing the reproduced color in the area of ​​the memory color in the natural image. Background technique [0002] When it is necessary to automatically adjust the natural image containing the area of ​​the memory color memorized by people, the following method is generally adopted, that is: setting the target color of the memory color as the adjustment object, so that the area of ​​the memory color in the natural image is adjusted to target color. For example, in the memory color adjustment method described in JP-A...

AI Technical Summary

Problems solved by technology

However, if the amount of color adjustment is reduced in consideration of these circumstances, there is a problem that, for example, in the case of a generally blue sky, the correction becomes weak, so that optimal reproduction cannot be performed well.

Images