Wavelets and Morphological Operators Based Classification of Epilepsy Risk Levels

Table 15

Performance analysis of postclassifiers in terms of weighted delay and quality value.

Methods/wavelets		SVD optimization		EM optimization		MEM optimization
		Weighted delay (sec)	Quality Value	Weighted delay (sec)	Quality Value	Weighted delay (sec)	Quality Value
Hard threshold	Haar	2.14	23.5	2.431	18.32	2.36	19.24
	dB2	2.017	23.82	2.23	19.72	2.14	20.49
	dB4	1.974	23.15	2.11	21.32	2.01	22.11
	Sym8	2.038	23.37	2.2	19.52	2.18	20.3
Soft threshold; heursure	Haar	1.94	20.16	2.19	20.12	2.08	20.85
	dB2	2.82	16.01	2.37	20.24	2.27	20.54
	dB4	2.41	19.99	2.31	19.79	2.27	20.57
	Sym8	2.16	18.95	2.26	20.44	2.13	22
Soft threshold; mini max	Haar	1.7	19.36	2.15	20.09	2.06	22.54
	dB2	2.23	19.39	2.3	18.87	2.16	20.41
	dB4	1.97	20.13	2.17	19.97	2.14	20.66
	Sym8	2.51	19.51	2.27	20.2	2.22	20.73
Soft threshold; rig sure	Haar	1.77	20.44	2.01	20.32	2.1	21.42
	dB2	1.62	18.77	2.07	19.4	2.04	19.95
	dB4	1.53	16.74	2.08	20.42	2.08	22.04
	Sym8	1.65	19.51	2.18	20.02	2.09	21.06
Soft threshold; sqtwolog	Haar	2.08	17.82	2.34	18.77	2.3	20.22
	dB2	3.25	16.73	2.42	19.17	2.36	20.1
	dB4	2.76	19.1	2.37	19.62	2.36	19.35
	Sym8	2.97	17.52	2.41	18.74	2.39	19.97
Morphological filters		2.26	20.62	2.2	19.52	2.18	20.3