The invention displays an image that conforms to an editing parameter set by the user and, depending upon the editing parameter requested, shortens the time required for the image to be displayed, thereby enhancing usability. To achieve this, the invention has a processing parameter input unit for inputting an editing-related parameter such as sharpness. If an image data file to be edited is read in from an image file storage unit, photographic condition information within the file is analyzed and the information obtained by analysis is compared with a parameter that has been set. If the two agree, then a display is presented based upon processed image data within the image file. If the two do not agree, then unprocessed image data within the same file is subjected to image processing in accordance with the set parameter and the processed image is displayed.