Laser & Optoelectronics Progress, Volume. 60, Issue 4, 0410003(2023)
Optical Image Block Encryption Method Based on Chaotic Convolution
Figures & Tables(10)
Fig. 1. Flow chart of proposed image encryption method based on chaotic convolution
Fig. 2. Encryption and decryption results of proposed algorithm. (a) (d) Original Lena and original Baboon; (b) (e) corresponding encrypted images; (c) (f) corresponding decrypted images
Fig. 3. Decrypted images of noise attack with different intensities. (a) k=0.05, PSNR=28.6261 dB; (b) k=0.1,PSNR=24.0310 dB; (c) k=0.2,PSNR=18.6476 dB; (d) k=0.5,PSNR=11.7872 dB
Fig. 4. Cropping attack. (a) Encrypted image with 1/8 cropping; (b) encrypted image with 3/8 cropping; (c) encrypted images with 1/2 cropping; (d) decrypted image of Fig.4 (a), PSNR=24.3597 dB; (e) decrypted image of Fig.4 (b), PSNR=19.4396 dB; (f) decrypted image of Fig.4 (c), PSNR=17.6242 dB
Fig. 5. Histograms analysis. (a) Original images; (b) histograms corresponding to original image; (c) histograms corresponding to encrypted image
Fig. 6. Decrypted images with deviation in cascade chaotic system parameters. (a) ∆α2=10-15, PSNR=0.9433 dB; (b)
Table 1. PSNR values of decrypted images with different block size
View tableTable 1. PSNR values of decrypted images with different block size
PSNR /dB 256×256 128×128 64×64 32×32 Lena 31.4661 31.4574 31.4500 31.1969 Peppers 30.7387 30.7340 30.7016 30.6177 Boat 31.9350 31.3812 31.3271 31.0849
Table 2. PSNR values of decrypted images with different compression ratio
View tableTable 2. PSNR values of decrypted images with different compression ratio
Image Proposed method Random convolution in reference［ 28 ］DRPE based on CS and FrFT Cr PSNR /dB Cr PSNR /dB Cr PSNR /dB Lena 0.2500（128×128）
0.0625（64×64）
0.12502（32×32）
31.4574
25.9983
22.1047
0.2500（128×128）
0.0625（64×64）
0.12502（32×32）
28.8792
23.5417
20.4360
0.5000（128×256）
0.3320（85×256）
0.2500（64×256）
31.9065
26.1014
14.0980
Peppers 0.2500（128×128）
0.0625（64×64）
0.12502（32×32）
30.7340
25.9754
21.7120
0.2500（128×128）
0.0625（64×64）
0.12502（32×32）
28.6278
23.4546
20.2588
0.5000（128×256）
0.3320（85×256）
0.2500（64×256）
32.0356
25.6076
11.6111
Boat 0.2500（128×128）
0.0625（64×64）
0.12502（32×32）
31.3812
26.4538
22.0111
0.2500（128×128）
0.0625（64×64）
0.12502（32×32）
29.2567
23.8030
21.1395
0.5000（128×256）
0.3320（85×256）
0.2500（64×256）
31.8176
26.3899
11.2389
Table 3. Correlation coefficients of adjacent pixels in plain image and cipher image
View tableTable 3. Correlation coefficients of adjacent pixels in plain image and cipher image
Image Vertical Horizontal Diagonal Plain image Ciper image Plain image Ciper image Plain image Ciper image Lena 0.9679 0.0044 0.9342 0.0005 0.9680 0.0024 Peppers 0.9575 0.0014 0.9508 0.0032 0.9575 0.0028 Boat 0.9664 0.0028 0.9419 0.0001 0.9667 0.0024
Table 4. PSNR values of decrypted images with deviation
View tableTable 4. PSNR values of decrypted images with deviation
Parameter deviation ∆α1=10-15 ∆β1=10-15 ∆h1=10-15 ∆α2=10-15 ∆β2=10-15 ∆h2=10-16 ∆γ1=10-2 ∆γ2=10-2 PSNR /dB 0.9359 0.9314 0.9423 0.9433 0.9443 0.9384 0.9474 0.9415
Tools
Get Citation
Copy Citation Text
Jia Wang, Li Liu. Optical Image Block Encryption Method Based on Chaotic Convolution[J]. Laser & Optoelectronics Progress, 2023, 60(4): 0410003
Paper Information
Category: Image Processing
Received: Oct. 13, 2021
Accepted: Dec. 21, 2021
Published Online: Feb. 13, 2023
The Author Email: Wang Jia (wangjia0313@126.com)
© Copyright 2018-2021 | Chinese Laser Press.
All Rights Reserved 沪ICP备15018463号-20