Fig. 3From: Pressure ulcer image segmentation technique through synthetic frequencies generation and contrast variation using toroidal geometryOn the left, mask for the initial solution of the active contours without edges. The red line defines the contour over the function \(\phi\) that defines the set \(C=\{ (x,y) | \phi (x,y) = 0\}\). On the right, initial points for the dynamic contoursBack to article page