is a more robust technique that
enhances images taken under non-uniform lighting
conditions by enhancing the darker regions in the
image retaining the brighter regions unaffected and
restoring natural colors [2]. Retinex [3-5] is an
effective technique for color image enhancement,
which can produce a very good enhanced result.
But the enhanced image has color distortion and
the calculation is complex. Li Tao and Vijayan