In electrical engineering and computer science , Image processing is any form of processing for which the input is an image , such as photographs or frames of video . The output of image processing can be either an image or a set of characteristics or parameters related to the image . In electrical engineering and computer science , image processing is any form of signal processing for which the input is an image , such as a photograph or video frame ; the output of image processing may be either an image or , a set of characteristics or parameters related to the image .