Issue No.08 - August (1981 vol.14)
R. Jain , Intelligent Systems Laboratory Wayne State University
Because they ignore stationary scene components, difference pictures provide a simple, robust method for detecting motion in the early stages of dynamic scene analysis.
R. Jain, "Dynamic Scene Analysis Using Pixel-Based Processes", Computer, vol.14, no. 8, pp. 12-18, August 1981, doi:10.1109/C-M.1981.220557