Table 17 NPCR and UACI of multiple encrypted RGB images.

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

Schemes

NPCR

UACI

Red

Green

Blue

Red

Green

Blue

Proposed Image 1

0.9961

0.9961

0.9961

0.3544

0.3177

0.3419

Proposed Image 2

0.9961

0.9963

0.9962

0.3506

0.3381

0.3533

25

0.9960

0.9961

0.9961

0.3347

0.3347

0.3346

27

0.9969

0.9969

0.9966

0.3367

0.3332

0.3367

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