An image processing apparatus that includes a determining section for determining whether or not read-in image data of an image recorded on a photographic film will require distortion aberration correction for correcting distortion caused by a photographing lens employed to record the image on the photographic film. Additionally, a reading-range setting section is included for setting an image reading range to be substantially the same range that is used for an output image, when a determination has been made that distortion aberration correction is not required. Alternatively, the reading-range setting section sets the image reading range to be larger than the range used for the output image by a predetermined amount, when it is determined that distortion aberration correction is required. As a result, missing image regions on the output image can be prevented.