Comparison of Gradient, Gradient Vector Flow and Pressure Force for Image Segmentation Using Active Contours
Joubin Hatamzadeh-Tabrizi, W. Robert J. Funnell · 2002
When used as the image force for active contours, the gradient has the disadvantage of having a restricted capture range. Two solutions for improving the capture range, gradient vector flow and pressure forces, were compared. Although GVF provides a good capture range, it sometimes leads to boundary delocalisation. As an alternative, pressure forces have shown promising results for histological middle-ear images. The use of open contours was also demonstrated, in addition to the usual closed contours.