Table 1 Results against different attacks (NC values)

Laplacian sharpening

1

1

1

1

Gaussian noise (standard variance = 10)

0.9926

1

1

1

Salt and Pepper noises addition (noise density = 0.02)

0.9486

0.9553

0.9602

1

Gaussian low pass filter (standard variance = 1.5, window = 5)

0.5971

0.677

0.6442

0.660

JPEG 80

0.974

1

1

1

JPEG 40

0.8723

0.8977

0.8824

0.9963

JPEG 25

0.8074

0.8296

0.8001

0.9478

Histogram equalization

1

1

1

1

Scale (512 - > 448)

0.5495

0.5904

0.6389

0.6234

Scale (512 - > 576)

0.5594

0.5974

0.6226

0.6154

Rotate 5°

0.5207

0.4896

0.5532

0.4423

Rotate 10°

0.5634

0.5489

0.4853

0.5325

Cropping (half of image)

0.8637

0.8783

0.8758

0.8783