Lung Cancer Detection Using Image Segmentation by means of Various Evolutionary Algorithms

Algorithm 3

Histogram equalization.

(1)	Obtain the histogram for the input image and find the probability mass function.
(2)	Find the cumulative distributive function; from that, find the CDF according to gray levels.
(3)	Find the new gray levels by using the following equation:
	CDFNew = CDF (number of gray levels − 1).
(4)	Map the new gray levels into a total number of pixels and plot the modified histogram.