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Mathematical Problems in Engineering
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2018
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Article
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Tab 2
Research Article
Image Denoising Algorithm Combined with SGK Dictionary Learning and Principal Component Analysis Noise Estimation
Table 2
Denoising indicators on SGK combined with five noise estimation algorithms.
Algorithms
Time/s
PSNR/dB
MSE
σ
= 2
PCA + SGK
2.733
+
0.733
0.733
1.799
43.385
2.983
Kurtosis + SGK
2.841
+0.841
0.841
4.699
43.378
2.987
Mode + SGK
2.768
+0.768
0.768
0.070
43.222
3.010
Med + SGK
4.063
+2.063
2.063
0.051
41.811
4.286
Min + SGK
0.496
−1.504
1.504
0.037
42.119
3.993
= 5
PCA + SGK
5.510
+
0.510
0.510
1.829
38.383
9.436
Kurtosis + SGK
5.166
+0.166
0.166
5.865
38.302
9.614
Mode + SGK
4.480
−0.520
0.520
0.091
38.139
9.981
Med + SGK
6.194
+1.194
1.194
0.047
38.251
9.727
Min + SGK
0.674
−4.326
4.326
0.035
34.175
24.865
= 10
PCA + SGK
10.342
+
0.342
0.342
1.604
35.177
19.201
Kurtosis + SGK
9.576
+0.424
0.424
4.848
34.795
21.559
Mode + SGK
8.809
+1.191
1.191
0.090
34.074
25.447
Med + SGK
10.463
+0.463
0.463
0.051
35.149
19.869
Min + SGK
1.640
−18.360
18.360
0.037
28.244
97.417
= 15
PCA + SGK
15.153
+
0.147
0.147
1.995
34.269
30.632
Kurtosis + SGK
14.196
+0.804
0.804
5.208
33.899
30.760
Mode + SGK
12.494
+2.506
2.506
0.084
31.381
47.311
Med + SGK
14.838
−0.162
0.162
0.082
33.221
30.971
Min + SGK
1.807
−13.193
13.193
0.029
28.274
96.766
= 20
PCA + SGK
20.071
+
0.071
0.071
1.618
31.911
41.876
Kurtosis + SGK
18.943
−1.057
1.057
4.818
31.574
45.256
Mode + SGK
17.038
−2.963
2.963
0.094
30.186
62.300
Med + SGK
19.319
−0.681
0.681
0.055
31.777
43.193
Min + SGK
1.877
−18.123
18.123
0.028
22.152
396.153
= 30
PCA+SGK
29.672
−
0.328
0.328
1.393
29.917
66.286
Kurtosis + SGK
28.480
−1.520
1.520
5.126
29.724
69.292
Mode + SGK
23.356
−6.644
6.644
0.084
29.044
161.709
Med + SGK
28.199
−1.801
1.801
0.054
29.614
71.074
Min + SGK
3.292
−26.708
26.708
0.029
18.675
882.180
= 40
PCA + SGK
39.546
−
0.454
0.454
1.865
28.371
94.630
Kurtosis + SGK
38.238
−1.762
1.762
5.134
28.305
96.062
Mode + SGK
33.463
−6.537
6.537
0.087
25.813
170.526
Med + SGK
37.068
−2.932
2.932
0.053
27.910
105.212
Min + SGK
5.385
−34.615
34.615
0.034
16.222
1152.049