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

Table 5

Variation in Euclidean distances between the 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 4.

Masses	DF	SC	SR	Method	%ΔSC	%ΔSR
A	0.0368	0.6612	0.4619	Manual	17.1	14.5
		0.7852	0.5339	Proposed
B	0.0624	0.6637	0.4596	Manual	7.0	14.4
		0.7116	0.5307	Proposed
C	0.0377	0.8894	0.6148	Manual	1.1	1.2
		0.8995	0.6224	Proposed
D	0.0762	0.8508	0.6093	Manual	0.0	0.0
		0.8508	0.6093	Proposed
E	0.0216	0.9267	0.6544	Manual	0.3	1.1
		0.9295	0.6472	Proposed
F	0.0298	0.8606	0.6024	Manual	2.9	5.2
		0.8360	0.5716	Proposed
G	0.0717	0.6612	0.4619	Manual	17.1	14.5
		0.7852	0.5339	Proposed