  In this paper an equalization technique for colour images is introduced. The
method is based on nth root and nth power equalization approach but with
optimization of the mean of the image in different colour channels such as RGB
and HSI. The performance of the proposed method has been measured by the means
of peak signal to noise ratio. The proposed algorithm has been compared with
conventional histogram equalization and the visual and quantitative
experimental results are showing that the proposed method over perform the
histogram equalization.
