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

Figure 3

Comparisons of segmentation results with different locations for the initial level set contours for masses with low signal areas having obscured, or ill-defined, margins with the Chan-Vese model. The first column presents the original mass lesions; the second column shows the corresponding weighted TV flow images and the search space for locating the initial contour. The third column shows the initial contours as curves connecting points with maximum gradients in the radial direction. The fourth column shows the manually drawn initial level set contours. The fifth column presents the segmentation outcomes with manually drawn initial level set and the last column presents the final segmentation results of the proposed method evolved with the same tuning parameters.

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