Fig. 4
From: Parametric action of homomorphic image of modular group and it’s application in image encryption

(a) Correlation among neighboring pixels in tree image (b) Correlation among neighboring pixels in cipherimage.
From: Parametric action of homomorphic image of modular group and it’s application in image encryption

(a) Correlation among neighboring pixels in tree image (b) Correlation among neighboring pixels in cipherimage.