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Advances, Systems and Applications

Table 2 The correlation coefficients between different medical images

From: A robust encryption watermarking algorithm for medical images based on ridgelet-DCT and THM double chaos

Images

Brain

Orbit

Internal auditory

canal

Knee

Foot

Spine

Coccygeal vertebra

Shoulder

Brain

1

0.0710

-0.2698

0.2966

-0.1972

0.2520

-0.3780

0.2520

Orbit

0.0710

1

0.1972

0.1395

0.0039

0.3131

-0.1879

0.3131

Internal auditory

canal

-0.2698

0.1972

1

-0.2164

0.1815

0.2520

0

0.3780

Knee

0.2966

0.1395

-0.2164

1

-0.0120

0.1909

-0.1909

-0.1909

Foot

-0.1972

0.0039

0.1815

-0.0120

1

-0.3131

0.1879

0.0626

Spine

0.2520

0.3131

0.2520

0.1909

-0.3131

1

-0.3750

0.2500

Coccygeal vertebra

-0.3780

-0.1879

0

-0.1909

0.1879

-0.3750

1

-0.1250

Shoulder

0.2520

0.3131

0.3780

-0.1909

0.0626

0.2500

-0.1250

1