written 7.8 years ago by
teamques10
★ 64k
|
modified 2.2 years ago
by
pedsangini276
• 4.7k
|
Mumbai University > Electronics > Sem 7 > Digital image processing
Marks: 10 M
Year: May 2015
|
written 7.8 years ago by
teamques10
★ 64k
|
We draw the original histogram of the image.
Here L=8, we now perform histogram equalization.
| Gray 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 | 550 | 0.34 | 0.34 | 2.38 | 2 |
| 1 | 300 | 0.18 | 0.52 | 3.64 | 4 |
| 2 | 0 | 0 | 0.52 | 3.64 | 4 |
| 3 | 0 | 0 | 0.52 | 3.64 | 4 |
| 4 | 0 | 0 | 0.52 | 3.64 | 4 |
| 5 | 200 | 0.125 | 0.645 | 4.48 | 4 |
| 6 | 325 | 0.20 | 0.845 | 5.91 | 6 |
| 7 | 225 | 0.14 | 1 | 7 | 7 |
| Σn=1600 |
Consider the 1st , 2nd and last column
Hence the equalized frequency table is
| Gray level | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
|---|---|---|---|---|---|---|---|---|
| nk | 0 | 0 | 550 | 0 | 500 | 0 | 325 | 225 |
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