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histogram equalization transformation function
Latest activity Commented on by Image Analyst
on 9 Dec 2018
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Suppose that a given 3-bit image(L=8) of size 64*64 pixels (M*N=4096) has the intensity distribution shown as below. How to obtain histogram equalization transformation function and then compute the equalized histogram of the image?
Rk nk
0 800
1 520
2 970
3 660
4 330
5 450
6 260
7 106
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Answer by Image Analyst
on 9 Dec 2018
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Call histeq() followed by imhist().
2 Comments
if equation i know how to finish it,, i want to know the code( without in-built function matlab), and if its c++ i aldy try and can,, but in matlab the code i write keep eror idk why
rk nk c sk = c/MN (L-1)sk rounded value
0 800 800 0.195 1.365 1
1 520 1320 0.322 2.254 2
2 970 2290 0.559 3.913 4
3 660 2950 0.720 5.04 5
4 330 3280 0.801 5.601 6
5 450 3730 0.911 6.377 6
6 260 3990 0.974 6.818 7
7 106 4096 1.000 7.0 7
Image Analyst
on 9 Dec 2018
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Why without built-in functions???
Why would you want to compute the histogram, then the cdf, then invert it, and use intlut() when you can just do it in one line of code?
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