Modified Global and Modified Linear Contrast Stretching Algorithms: New Colour Contrast Enhancement Techniques for Microscopic Analysis of Malaria Slide Images

Table 1

The DSM for GCS and MGCS techniques that have been applied on 6 malaria images.

Images	Contrast enhancement techniques	Distribution separation measure (DSM)
		Red	Green	Blue	Average
Blurred trophozoite	GCS	21	31	15	22.33
	MGCS Set I	47	68	29	48.00
	MGCS Set II	54	77	33	54.67
	MGCS Set III	51	73	32	52.00
Blurred trophozoite with additional salt-and-pepper noise	GCS	5	5	5	5.00
	MGCS Set I	45	66	29	46.67
	MGCS Set II	53	75	33	53.67
	MGCS Set III	49	70	31	50.00
Normal ring	GCS	18	32	18	22.67
	MGCS Set I	39	77	39	51.67
	MGCS Set II	45	89	46	60.00
	MGCS Set III	41	81	42	54.67
Underexposed trophozoite	GCS	27	40	22	29.67
	MGCS Set I	58	82	45	61.67
	MGCS Set II	67	94	51	70.67
	MGCS Set III	61	89	47	65.67
Normal schizont	GCS	6	5	5	5.33
	MGCS Set I	27	25	32	28.00
	MGCS Set II	30	28	24	27.33
	MGCS Set III	28	28	28	28.00
Blurred gametocyte	GCS	28	37	17	27.33
	MGCS Set I	55	72	31	52.67
	MGCS Set II	63	82	35	60.00
	MGCS Set III	58	78	34	56.67