Table 16 NPCR and UACI of different RGB images.

From: A novel color images security-based on SPN over the residue classes of quaternion integers \(\:\varvec{H}{\left(\mathbb{Z}\right)}_{\varvec{\pi\:}}\)

Images

Red

NPCR

Green

Blue

Red

UACI

Green

Blue

Female

0.9964

0.9958

0.9960

0.3317

0.3344

0.3321

Pepper

0.9964

0.9961

0.9962

0.3339

0.3323

0.3347

House

0.9967

0.9963

0.9963

0.3332

0.3343

0.3335

Sailboat on Lake

0.9959

0.9960

0.9963

0.3328

0.3338

0.3314

[3]

0.9963

0.9960

0.9957

0.3329

0.3368

0.3344

[6]

0.9959

0.9964

0.9962

0.3269

0.3037

0.2762

[21]

0.9960

0.9961

0.9961

0.3347

0.3347

0. 3346

[22]

0.9960

0.9960

0.9960

0.3348

0.3348

0. 3348

[33]

0.9961

0.9952

0.9963

0.3347

0.3371

0.3336

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