A mammography provides a grayscale image of the breast. The main challenge analyzing images is to extract region boundary breast abnormality for further analysis. In computer vision, this method also known as segmentation. variational level set mathematical model has been proven be effective Several selective types models have recently formulated accurately segment specific object on images. Ho...

Traditionally variational level set model for image segmentation is solved by using gradient descent method, which has low computational efficiency and needs complex re-initialization of level set functions as signed distance functions. In this paper, we first reformulate the variational model as a constrained optimization problem. Then we present an augmented Lagrangian projection method to pr...