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EURASIP Journal on Advances in Signal Processing
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Table 2
Rate
e
of new visible edges, mean ratio
r
̄
of the gradients at visible edges and the image information entropy
H
for these methods on three test images
From:
Visibility enhancement using an image filtering approach
Images/Index
[
20
]
[
21
]
Proposed
Forest
e
0.35
0.54
0.02
r
̄
0.59
2.26
1.45
H
5.15
7.25
6.42
Wall
e
0.15
0.44
0.20
r
̄
0.45
1.86
1.77
H
6.14
7.34
7.08
Sweden
e
−0.09
0.49
0.29
r
̄
0.65
1.73
2.02
H
6.42
7.38
7.37
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