Cover image name	Maleki 1 - 2, T = 3		Our method α = 1, β = 1		Maleki 2 - 3, T = 5		Our method α = 2, β = 1
Cover image name	EC (bits)	PSNR (dB)	EC (bits)	PSNR (dB)	EC (bits)	PSNR (dB)	EC (bits)	PSNR (dB)
Panel a
Lena	455,908	46.66	667,947	39.26	661,852	41.89	799,796	38.15
Peppers	467,264	46.53	665,818	38.58	670,300	41.56	797,927	37.59
Boat	486,960	46.50	674,691	37.32	703,840	41.18	806,216	36.61
Jet	393,888	47.54	665,409	38.28	613,560	43.05	796,643	37.45
Splash	404,948	47.13	658,841	38.16	598,144	43.06	790,005	37.29
Baboon	514,252	46.36	699,727	35.97	758,984	40.81	831,288	35.46
Tiffany	436,584	46.87	665,562	39.29	642,692	42.24	796,893	38.25
Elaine	493,948	46.51	669,477	39.68	718,440	41.06	801,306	38.51
Couple	479,912	46.53	675,311	37.97	693,864	41.43	806,727	37.10
Average	459,296	46.74	671,420	38.28	673,520	41.81	802,978	37.38
Cover image name	Maleki 2 - 4, T = 6		Our method α = 2, β = 2		Maleki 3 - 4, T = 15		Our method α = 3, β = 1
Cover image name	EC (bits)	PSNR (dB)	EC (bits)	PSNR (dB)	EC (bits)	PSNR (dB)	EC (bits)	PSNR (dB)
Panel b
Lena	760,952	36.41	935,830	35.39	834,264	38.37	935,721	35.38
Peppers	766,792	36.06	930,307	35.24	824,100	38.73	930,439	35.23
Boat	800,040	35.48	940,185	34.55	846,968	37.82	940,190	34.59
Jet	680,088	38.23	928,554	35.02	824,148	38.88	928,518	35.02
Splash	633,016	38.80	921,888	34.96	802,052	39.71	921,880	34.96
Baboon	800,032	35.52	960,035	33.84	926,840	35.98	964,208	33.78
Tiffany	726,376	37.12	929,242	35.53	823,408	38.78	929,185	35.33
Elaine	800,032	35.23	935,455	35.68	831,240	38.03	935,387	35.69
Couple	800,032	35.88	939,466	34.87	856,396	37.68	939,535	34.88
Average	751,929	36.53	935,662	35.01	841,046	38.22	936,118	34.98