Determining image quality based on distribution of representative autocorrelation coefficients

An image evaluation device, comprising:

• a partial area extracting section that extracts a plurality of partial areas from an image;
• an extracted image generating section that extracts plural extracted images corresponding to plural partial areas from the image;
• an autocorrelation calculating section that calculates autocorrelation coefficients in two dimensional displacement for each extracted image;
• a degradation function estimating section that calculates a value of a degradation function for each two dimensional displacement, by calculating a representative value of the autocorrelation coefficients at the corresponding two dimensional displacement among the partial areas, the degradation function representing a degree of degradation of the image from the autocorrelation coefficients for each two dimensional displacement;
• and
• a checking section that checks the quality of the image based on the degradation function.