1. A method for altering a single two-dimensional resultant image, using three-dimensional information contained in a plurality of two-dimensional source images, using a program stored in a computer, each image depicting a scene from a spatially distinct point of view, the program using the procedure of subtracting, from a single one of said source images, a blurred version of each one of the remaining source images for altering the information in a physical image which can be printed on a printer.