introduction: various computer assisted medical procedures such as dental implant, orthodontic planning, face, jaw and cosmetic surgeries require automatic quantification and volumetric visualization of teeth. in this regard, segmentation is a major step. material and methods: in this paper, inspired by our previous experiences and considering the anatomical knowledge of teeth and jaws, we prop...

Variational Geometry technique, also known as Constraints Satisfaction Problem technique (CSP), is one of the core components in modern CAD systems. One of the known problems of the existing technique is its inability of solving topological changes. In this paper, we propose a new Varaitional Geometry technique with Algebraic Level Set (ALS) geometric model. Based on half-space model theory and...

To solve the issues with conventional level set segmentation algorithms, which are sensitive to initial contours and less noise-resistant, a model based on coupling of texture information structural is developed. In this model, rotation invariant mask produced by fractional-order differentiation used first describe image’s global information. Then, power function energy generalization solved ap...