1. A method for enhancing a video, comprising: (1) determining parameters for a linear histogram stretch to be applied to pixels in a first frame; (2) applying the linear histogram stretch to the pixels in the first frame with the parameters determined for the first frame; (3) determining a difference in histogram properties between the first frame and a second frame; (4) if the difference is less than a first threshold, applying the linear histogram stretch to the pixels in the second frame with the parameters determined for the first frame.