Skip to main content

Table 3 Image quality of method 3 (the secret images are recovered in two levels)

From: Progressive sharing of multiple images with sensitivity-controlled decoding

Secret images

Threshold r to recover the secret image

Image quality on low-level recovery

Image quality on high-level recovery

Image quality of stego

PSNR

SSIM

MSE

Stego images

PSNR

SSIM

MSE

House

4

31.53

0.858

45.7

Lossless

Barbara

40.07

0.979

6.40

Cameraman

5

27.11

0.853

126.5

Lossless

Lake

41.57

0.978

4.53

Lena

5

29.38

0.869

75.0

Lossless

Couple

41.04

0.978

5.12

Pepper

6*

No such level*

Lossless

Baboon

41.41

0.980

4.70

Jet

6*

No such level*

Lossless

Indian

41.56

0.976

4.54

Blonde

6*

No such level*

Lossless

Bridge

40.08

0.978

6.38

  1. *Since we used (r, n) = (6, 6) in the secret sharing of the third group's secret images, [Pepper, Jet, Blonde], these three images cannot be viewed unless all six stego images have been collected. Consequently, only high-level PSNR, i.e., only the lossless version, exists.