Dependence of Shape-Based Descriptors and Mass Segmentation Areas on Initial Contour Placement Using the Chan-Vese Method on Digital Mammograms

Table 3

Variation in Euclidean distances between Fourier descriptors (DF), percentage differences in shape convexity (%ΔSC), and shape rectangularity (%ΔSR) due to changes in the location of the initial level set contours evolved with tuneable parameters , for masses in Figure 3.

Masses	DF	SC	SR	Method	%ΔSC	%ΔSR
A	0.16	0.7152	0.4861	Manual	16.5	31.5
		0.8439	0.6681	Proposed
B	0.10	0.5373	0.3762	Manual	22.4	9.6
		0.6731	0.4143	Proposed
C	0.08	0.5610	0.3845	Manual	28.2	21.6
		0.7450	0.4774	Proposed
D	0.13	0.8071	0.6301	Manual	12.5	16.6
		0.9143	0.7440	Proposed
E	0.06	0.7737	0.5017	Manual	16.7	3.8
		0.9143	0.4830	Proposed
F	0.05	0.5955	0.4188	Manual	10.1	10.9
		0.5383	0.3755	Proposed
G	0.03	0.7899	0.5297	Manual	1.7	8.8
		0.8036	0.5786	Proposed