Table 23 Contrast and energy of original and encrypted RGB images.

From: RGB image encryption using SPN with a novel block cipher over simple graph adjacency matrices and Galois fields

Schemes

Red

Contrast Green

Blue

Red

Energy Green

Blue

Deblur original

0.1193

0.1210

0.1051

0.1750

0.2140

0.2606

Deblur encrypted

10.4698

10.6074

10.4856

0.0156

0.0156

0.0156

Oakland original

0.1678

0.1912

0.1094

0.2603

0.3409

0.7127

Oakland encrypted

10.4572

10.4072

10.4789

0.0156

0.0156

0.0156

Stockton original

0.2413

0.2164

0.2505

0.2169

0.3111

0.3026

Stockton encrypted

10.3530

10.4339

10.4640

0.0156

0.0156

0.0156

House original

0.1716

0.1740

0.2406

0.2117

0.2148

0.1695

House encrypted

10.4175

10.4911

10.4747

0.0156

0.0156

0.0156

26 original

0.5439

0.5000

0.4726

0.0779

0.0821

0.1708

26 encrypted

10.5114

10.4770

10.4894

0.1051

0.1048

0.1049

52 Original

0.4717

0.4879

0.4261

0.0838

0.0834

0.1242

52 encrypted

10.4878

10.4861

10.5034

0.0156

0.0156

0.0156

42 original

0.4040

0.4063

0.3995

0.3292

0.2594

0.2135

42 encrypted

10.4327

10.4897

10.4779

0.0156

0.0156

0.0156

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