IMAGE DEGRADATION DETECTING DEVICE, IMAGE DEGRADATION DETECTING METHOD, PROGRAM FOR EXECUTING THE IMAGE DEGRADATION DETECTING METHOD, AND RECORDING MEDIUM

摘要

Intended is to perform an adaptive image degradation detecting operation for a photographed image, by a simple constitution for a short time period. The correlative coefficient deciding region (35) of the image region (31) of an input image is set (at S21). A correlative coefficient is calculated from the correlation coefficient deciding region, a threshold value reflecting the characteristics of the input image is decided (at S22). The threshold value is used to decide the correlation coefficient by a boundary search (at S24), and the degradation of the image is determined (at S25).