Wavelet-based color modification detection based on variance ratio

Table 3 Mean error value comparison between AIVC and the proposed method for various demosaicing methods and shifted hue angles in a 256 × 256 centered block

Demosaicing method	Shifted hue degree	0°	45°	90°	135°	180°	225°	270°	315°
Bilinear	AIVC	0.02	0.27	0.24	0.24	0.24	0.32	0.34	0.24
Bilinear	Proposed	1.26	1.26	1.26	1.26	1.26	1.26	1.26	1.26
AHD	AIVC	12.06	17.42	17.26	17.52	17.94	18.35	18.01	17.62
AHD	Proposed	6.26	6.38	6.14	6.38	6.38	6.26	6.14	6.14
AMaZE	AIVC	19.66	21.51	21.50	21.65	21.61	21.74	21.78	21.49
AMaZE	Proposed	10.88	11.00	11.00	11.00	11.00	11.00	11.00	11.00
DCB	AIVC	22.06	34.26	35.36	36.08	36.76	37.41	35.03	34.20
DCB	Proposed	2.23	2.85	2.59	2.85	2.96	2.60	2.72	2.48
LMMSE	AIVC	12.24	15.60	15.90	16.27	15.98	16.23	16.09	15.79
LMMSE	Proposed	13.51	13.51	13.51	13.51	13.51	13.51	13.51	13.51
VNG	AIVC	8.50	10.71	10.62	10.98	10.76	11.08	10.92	10.61
VNG	Proposed	4.95	4.95	4.95	4.95	4.95	4.95	4.95	4.95
HPHD	AIVC	30.28	31.55	31.49	31.53	32.06	31.76	31.76	31.75
HPHD	Proposed	21.87	21.87	21.87	21.87	21.86	21.65	21.76	22.10
Average	AIVC	14.97	18.76	18.91	19.18	19.34	19.56	19.13	18.81
Average	Proposed	8.71	8.83	8.76	8.83	8.83	8.75	8.76	8.78