An image correcting method of the present invention includes: a step of performing a
preprocessing process on an original image to generate a mask image including only an
erased area of the original image; a step of predicting, by using generative adversarial
networks, an image which is to be synthesized with the erased area in the mask image; and
a step of synthesizing the predicted image with the erased area of the original image to
generate a new image.