Image contrast enhancement based on the piecewise-linear approximation of CDF
Sang‐Yeon Kim, Dongil Han, Seung-Jong Choi, Jong-Seok Park · IEEE Transactions on Consumer Electronics · 1999
We present a new image contrast enhancing method based on the piecewise-linear approximation of the cumulative density function (CDF). Reduced hardware is required for CDF calculation, since the number of bins is greatly reduced thanks to this approximation. With the proposed method, various contrast enhancing effects can be implemented such as histogram equalization, partial or entire histogram modification.