Before revision: The geodesic active contour model (GAC) is a commonly used segmentation model for medical image segmentation. The level set method (LSM) is the most popular approach for solving the model , via implicitly representing the contour by a level set function.
After revision: Active contour models have been widely used in image segmentation, and the level set method (LSM) is the most popular approach for solving the model , via implicitly representing the contour by a level set function.