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Exercise
. The 7 x 7 image with eight gray levels is given below, where each gray
level value is represented in normalized form from 0 (black pixel) to 1
(white pixel)
0
3/7
2/7
2/7
1/7
1/7
4/7
3/7
2/7
1/7
1/7
1/7
1/7
4/7
2/7
0
1
1/7
3/7
0
0
0
5/7
1/7
0
6/7
0
1/7
1/7
1/7
1/7
3/7
6/7
6/7
5/7
1/7
1/7
1/7
1/7
5/7
6/7
4/7
1
0
0
0
O
4/7
a) Calculate the probabilities of each gray level and plot the image's histogram.
b) Which pixels are predominant in the original image, dark or bright?
c) Using the cumulative distribution function, equalize the histogram calculated in
part (a) and plot the resulting (equalized) histogram.
(d) Show the resulting 7 x 7 image after histogram equalization.

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Commulative Distribution.png

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