A dynamic range compression processing and a plurality of other predetermined image processings are separately carried out on an original image data. A dynamic-range-compressed image is displayed on the basis of image data obtained by carrying out the dynamic range compression processing on the original image data and a plurality of otherwise-processed images are displayed on the basis of a plurality of pieces of image data obtained by carrying out the other predetermined image processings on the original image data. An otherwise-processed image is displayed on the basis of image data which is obtained by carrying out the other predetermined image processing on the same original image data as the original image data of the dynamic-range-compressed image which is displayed upon switching action by the operating means.