Topology preserving active contours

Shape and Topology Constraints on Parametric Active Contours

New Algorithms for Controlling Active Contours Shape and Topology

In recent years the eld of active contour based image segmentation have seen the emergence of two competing approaches The rst and oldest approach rep resents active contours in an explicit or parametric manner corresponding to the Lagrangian formulation The second approach represent active contours in an implicit manner corresponding to the Eulerian framework After comparing these two approach...

Topology and shape constraints on parametric active contours

In recent years, the eld of active contour based image segmentation has seen the emergence of two competing approaches. The rst and oldest approach represents active contours in an explicit (or parametric) manner corresponding to the Lagrangian formulation. The second approach represents active contours in an implicit manner corresponding to the Eulerian framework. After comparing these two app...

Template-Based Active Contours

We develop a generalized active contour formalism for image segmentation based on shape templates. The shape template is subjected to a restricted affine transformation (RAT) in order to segment the object of interest. RAT allows for translation, rotation, and scaling, which give a total of five degrees of freedom. The proposed active contour comprises an inner and outer contour pair, which are...

Learning Accurate Active Contours

Focus of research in Active contour models (ACM) area is mainly on development of various energy functions based on physical intuition. In this work, instead of designing a new energy function, we generate a multitude of contour candidates using various values of ACM parameters, assess their quality, and select the most suitable one for an object at hand. A random forest is trained to make cont...