No

attacks

the similarity detector

Lena

Baboon

Head

1

wavelet lossy compression

30.121

30.815

31.984

2

DCT compression (8 × 8)

31.485

31.04

30.217

3

MAP 9 × 9

wiener filter

16.558

10.685

15.456

soft threshold

10.67

10.095

12.544

hard threshold

12.599

10.748

12.372

4

border cut

pixel = 6

30.683

30.27

31.592

pixel = 18

26.916

22.991

28.555

5

scale change [a]

(1/2, 2)

14.864

9.884

14.854

(1/3, 3)

6.98

6.388

7.358

6

median filter (7 × 7)

6.183

6.711

6.553

7

binary segmentation [b]

19.01

16.846

15.074

8

edge enhancement

Laplacian

27.768

26.157

26.823

log

28.4

27.747

28.969

unsharp

30.996

28.691

28.975

average

10.189

7.368

6.455

Gaussian

29.512

29.747

30.422

9

contrast change

log(f + 2)

11.7

14.834

19.002

log(f − 2)

7.837

9.203

13.607

10

jitter

12.62

12.161

11.041

11

whitening (25%)

15.733

15.3611

14.597

12

rotation 0.65˚

6.908

6.246

8.514

13

partial extraction (25%)

8.589

9.333

11.577

14

template removal

30.858

30.769

31.315

15

high-pass filter [c]

12.886

12.987

12.778

16

notch filter [d]

23.053

20.128

23.98

17

secondary modulation

DPR

14.273

13.938

17.882

DPRCORR

12.096

11.723

17.698