Introduction - If you have any usage issues, please Google them yourself
Median filtering has been shown to be very robust and to have performance comparable to higher complexity methods. However, storing and processing many frames of video (as is often required to track slower moving objects) requires an often prohibitively large amount of memory. This can be alleviated somewhat by storing and processing frames at a rate lower than the frame rate— thereby lowering storage and computation requirements at the expense of a slower adapting background.