Grey level	0	1	2	3	4	5	6	7
Frequency of occurrence	0	0	90	200	400	240	70	0

Perform histogram equalization.

Draw the histograms before and after equalization.

Mumbai University > Electronics > Sem 7 > Digital image processing

Marks: 10 M

Year: May 2013

We draw the original histogram of the image.

Here L=8, we now perform histogram equalization.

Grey level	nk	PDF,Pr(k) = n,Σ n	CDF,Sk =Σ pr(k)	Sk x (L-1),i.e. sk x 7	Round off
0	0	0	0	0	0
1	0	0	0	0	0
2	90	0.09	0.09	0.63 …