Descriptive Statistics

The descriptive statistics of the manual segment width measurements for the image sets are summarized in Table I and the standard deviations of the width measurements are summarized in Table II.

TABLE I: Descriptive statistics of the profile diameters.
Dataset	Obs	Mean	Std Div	Std E	Min	Max
HIRS	O	4.35	1.26	0.03	1.51	7.75
	O₁	4.12	1.25	0.03	1.39	7.14
	O₂	4.35	1.35	0.03	1.21	7.61
	O₃	4.58	1.26	0.03	1.88	7.44
VDIS	O	8.85	2.57	0.05	3.28	18.60
	O₁	8.50	2.54	0.05	2.48	18.33
	O₂	8.91	2.69	0.06	3.12	19.30
	O₃	9.15	2.67	0.06	3.68	18.47
CLRIS	O	13.80	4.12	0.24	6.85	21.73
	O₁	13.19	4.01	0.24	6.71	21.27
	O₂	13.69	4.22	0.25	6.50	22.10
	O₃	14.52	4.26	0.25	7.11	22.56
KPIS¹	O	7.40	0.36	0.03	6.41	8.38
	O₁	7.74	0.63	0.05	5.49	9.10
	O₂	7.29	0.49	0.04	6.07	7.94
	O₃	7.17	0.37	0.03	6.21	8.22
KPIS²	O	7.52	0.42	0.03	6.33	8.42
	O₁	7.97	0.47	0.04	6.66	9.16
	O₂	7.60	0.42	0.03	6.23	8.82
	O₃	7.00	0.52	0.04	5.51	8.50

TABLE II: Standard Deviations of the measurement methods.
	HRIS		VDIS		CLRIS		KPIS¹		KPIS²
	Err SD		Err SD		Err SD		Err SD		Err SD
σ_ξ	σ_η	σ_ξ	σ_η	σ_ξ	σ_η	σ_ξ	σ_η	σ_ξ	σ_η
O₁	0.288	0.303	0.543	0.560	0.567	0.573	0.417	0.394	0.234	0.261
O₂	0.256	0.256	0.621	0.616	0.698	0.707	0.317	0.322	0.213	0.212
O₃	0.285	0.284	0.669	0.649	0.566	0.540	0.326	0.332	0.233	0.222

There are two datasets for the KPIS:

The first set (KPIS¹) was used at to compare with Lowell (2004) as we considered his centerpoints. We used another tool to extract the kick points by plotting the cross profile for each centerpoint then the operator click on the right side to choose right point and on the left side to chose the left point on the profile. The centerpoints were defined by Lowell. This set was used in the reviewdb (Al-Diri (2008)) paper.
The second set (KPIS²) was collected using the manual method that described in the reviewDB and used in the Al-Diri (2009) paper.

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Bibliography

Retinal Image Computing & Understanding