Table 7 PCC values computed for plain and encrypted images in three directions: horizontal (H), diagonal (D), and vertical (V).

From: A chaos-based augmented image encryption scheme for satellite images using Fredkin logic

Image

Plain Images (PCC)

Encrypted Images (PCC)

H

D

V

H

D

V

Satellite Image 1

0.888321

0.904528

0.904423

\(-0.005642\)

\(-0.005415\)

0.003279

Satellite Image 2

0.929822

0.84726

0.898305

0.000495

0.00331

\(-0.0006066\)

Satellite Image 3

0.941106

0.876438

0.928785

\(-0.005468\)

0.002015

0.006614

Mandrill

0.848778

0.750624

0.79088

\(-0.003545\)

\(-0.004939\)

0.001899

Peppers

0.959422

0.930426

0.966795

\(-0.00564\)

\(-0.003348\)

\(-0.00681\)

Average

0.9134898

0.8618552

0.8978376

\(-0.003960\)

\(-0.001675\)

0.000874