Correction processing is performed on a region that requires correction processing, in a photographed image obtained by taking a photograph of a subject, and a corrected image is obtained. The degree of effect is calculated in the corrected image. Then, judgment is made, based on the magnitude of the degree of effect, as to whether it is required to check the effect of correction processing performed on the photographed image. If it is judged that it is required to check the effect of correction processing, at least one of the photographed image and the corrected image is displayed to check the effect. Then, the corrected image is printed.