Trimming is automatically performed based on a person or persons in whom a photographer has interest. All of facial images included in a whole image are detected. Then, judgment is made as to whether each of the detected facial images is a facial image of a specific person, face information about whom is stored in a face database. If the detected facial images include a facial image or images of the specific person or persons, trimming is performed based on the facial image or images of the specific person or persons.