Summary of Existing Techniques
Existing contrast enhancement techniques for digital
video applications fall under two broad categories –
contrast shaping based and histogram equalization based
methods. Although the underlying methods of these
approaches are derived from image processing, they
cannot be directly applied to digital video. This may lead
to over-enhancement and other artifacts such as
flickering, contouring etc. Thus traditional image
processing techniques must be adapted for video
applications and especially so for the consumer
electronics industry.