Table 23 Contrast of multiple original and encrypted RGB images.

From: Multiple color images security by SPN over the residue classes of Gaussian integer \(\:Z{\left[i\right]}_{h}\)

Images

R. Layer

G. Layer

B. Layer

Image 1 Original

0.4717

0.4879

0.4261

Image 1 Encrypted

10.4878

10.4861

10.5034

Image 2 Original

0.5123

0.5176

0.4418

Image 2 Encrypted

10.4896

10.5229

10.5129

27Orignal

0.5439

0.5000

0.4726

27Encrypted

10.5114

10.4770

10.4894

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