Image Processing Reference
In-Depth Information
The cumulative distribution function
CDF(
f
)
is de
ned as
X
f
CDF(
f
) ¼
p
(
i
)
(
2
:
127
)
i
¼
0
As an example, the histogram, PDF and CDF for the LENA image are shown in
Figures 2.43 through 2.45.
1000
800
600
400
200
0
0
50
100
150
200
250
Code value
f
FIGURE 2.43
Histogram of LENA image.
0.015
0.01
0.005
0
0
50
100
150
200
250
Code value
f
FIGURE 2.44
PDF of LENA Image.
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