1. A computer-implemented method of recording digitally stored surveillance images, said method comprising: dividing, by a computer, a series of continuous digital picture image frames according to timing intervals, said series comprising a reference frame and a plurality of captured frames; storing, by said computer, every pixel of said reference image in a frame buffer; detecting, by said computer, a motion difference between a captured image and said reference image by determining a difference between blocks of pixels from said captured image and said reference image; attributing, by said computer, a motion code, based on said difference, and a time stamp to said captured image, instead of pixel information; and only recording, by said computer, said motion code of said captured image when said motion code matches a predetermined threshold.