Table 8. The PSNR of decrypted image under different image processing operations.

Image processing operations	PSNR (dB)
Pepper & Salt Noise 0.005	47.57
Pepper & Salt Noise 0.05	31.87
Pepper & Salt Noise 0.5	19.11
Gaussian Noise [0, 0.05]	19.25
Cropping 25%	29.15
Cropping 50%	23.88
Compression (Quality Factor = 80)	18.63
Compression (Quality Factor = 50)	18.65
Rotation 45°	18.65
Brighten	18.68
Darken	18.66