Two‐dimensional histogram specification using two‐dimensional cumulative distribution function
Seung‐Won Jung · Electronics Letters · 2014
Recently developed two‐dimensional (2D) histogram specification (HS) methods can improve the contrast in an image by increasing the pixel‐value differences among the neighbouring pixels. However, the conventional 2D HS methods use the 1D cumulative distribution function (CDF) for pixel‐value mapping, and thus the 2D histogram of an output image largely deviates from a 2D target histogram. A 2D CDF‐based pairwise pixel‐value mapping method is presented. Experimental results show that the 2D histogram of the output image obtained by the proposed method well approximates the 2D target histogram.