Table 3.

PSNR (dB) of the information embedded image

Information embedded images (512 × 512)	USAF (256 × 256) Scaling factor (α)					DDNT (256 × 256) Scaling factor (α)
	0.03	0.04	0.05	0.06	0.07	0.03	0.04	0.05	0.06	0.07
Camerman	38.99	37.57	36.24	35.03	33.94	39.60	38.35	37.15	36.03	35.00
Pepper	40.92	38.85	37.14	35.68	34.42	41.89	39.94	38.29	36.88	35.64
Elaine	32.67	32.29	31.85	31.36	30.85	32.80	32.51	32.16	31.77	31.35
Lena	33.97	33.46	32.90	31.66	32.29	34.14	33.75	33.30	32.80	32.27