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Perform histogram equalization and plot the original and equalized histogram.

written 9.5 years ago by teamques10 ★ 70k

modified 3.8 years ago by pedsangini276 • 4.8k

Mumbai University > Electronics > Sem 7 > Digital image processing

Marks: 10 M

Year: Dec 2014

digital image processing

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written 9.5 years ago by teamques10 ★ 70k

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	200	0.125	0.125	0.875	1
1	300	0.185	0.31	2.17	2
2	500	0.3125	0.622	4.35	4
3	350	0.2185	0.841	5.88	6
4	250	0.156	1	7	7
5	0	0	1	7	7
6	0	0	0
7	0	0	0
Σn=1600

Consider the 1st, 2nd and last column

Hence the equalized frequency table is

1	2	3	4	5	6	7
200	300	0	500	0	350	250

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