1. A method of detecting a still pixel between temporally adjacent frames F(t) and F(t−1) in a video sequence, comprising: computing a difference between at least a portion of frames F(t) and F(t−1) containing a selected pixel over a selected time range; designating the selected pixel to be a still pixel candidate if the difference is less than a first selected threshold; and raising a counter by one increment for each frame within the selected time range for which the selected pixel is designated as a still pixel candidate and lowering the counter by one increment for each frame within the selected time range for which the selected pixel is not designated as a still pixel candidate; wherein the selected pixel is detected to be a still pixel if the counter is greater than a second selected threshold.