Nonlinear Multi-Image Encryption Scheme with the Reality-Preserving Discrete Fractional Angular Transform and DNA Sequences

Table 8

PSNR values for different subimages in test group 3.

Image	PSNR (dB)				Resolution ratio
	Couple	Airfield	Flowers	Lake
	23.7612	21.2786	21.2690	22.9572
	26.7980	23.8957	23.1842	25.1712
	27.1773	23.9516	23.9700	24.5594
	24.7250	22.5693	21.9644	23.4695
	27.7772	21.7138	19.9242	31.5062
	26.2791	21.7087	19.0926	27.0977
	27.0403	21.1431	19.4538	26.6705
	38.9034	43.1816	36.8264	29.8761