Color reproduction evaluation device and evaluation method of color image

摘要

The present invention relates to an apparatus and an evaluation method for evaluating the fidelity of color reproduction of a color image. More particularly, the present invention relates to an apparatus and an evaluation method for evaluating the color fidelity of a color image by using a method including evaluation of human's psychological elements in addition to objective evaluation of color difference by the method of JIS Z 8730 To an apparatus and method for evaluating fidelity. The conventional color reproduction fidelity evaluation method (JIS Z 8730) does not consider human psychological factors, that is, subjective evaluation, so that a color difference corresponding to a physical evaluation E) does not reflect the subjective evaluation of the color even though the evaluation result of the evaluation index "0" is obtained. Therefore, according to JIS Z 8730, E) as an exponent, and does not take subjective evaluation of human into consideration, and thus does not reflect the sensation felt by humans in the fidelity of color reproduction. The present invention relates to a color difference calculating means for calculating and displaying a color difference between a color original and a sample reproduced from the color original in an (L *, a *, b *) uniform perceptual space and a subjective evaluation A correlation evaluation means for calculating a correlation between data calculated by the color difference calculation means and data calculated by the subjective evaluation result calculation means; And a subjective evaluation color difference display means for calculating and displaying a color difference in which the subjectivity of human being is reflected by using the data. In the above-mentioned JIS Z 8730 color difference display method, a subjective evaluation factor of human is reflected, It is a technology that enables color reproduction fidelity evaluation.