1. 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.