An image processing apparatus is disclosed which can integrate a plurality of images without depending upon header information of a file. Information of one or more images is inputted as a main image or images. Incidental information relating to the inputted main image or images such as information necessary for integration of a plurality of images is encoded into a first encoded image which can be discriminated based on a visual characteristic and a second encoded image such as a barcode which can be discriminated by an image analysis. The inputted main image or images and the first and second encoded images are integrated so as to be displayed in compartmentalized respective regions of a display screen, and header information is added to the composite image to produce structured image information.