Multi-resolution algorithms for active contour models

Physically And Statistically Based Deformable Models For Medical Image Analysis

“…In addition to user interaction, other approaches have been proven useful to deal with the snakes' limited capture range problem and difficulties in progressing into boundary concavities. These include the incorporation of inflation forces [9], multi-resolution search [10], an initial step to optimize for rigid parameters, distance transformbased potential functions, and Gradient Vector Flow Fields (see Section 1.6.5). In the next chapter, deformable organisms are introduced as an attempt to provide a simple model of the human expert's cognitive abilities in order to guide the model's deformations.…”

A Geometric Contour Framework with Vector Field Support

“…The widely used multi-scale smoothing scheme is Gaussian pyramid. But this scheme will bring with the implementation difficulties for curve evolution across different scales [14] and lose accurate edge locating ability. To deal with these problems, a more advanced diffusion process called complex diffusion process is adopted in this paper.…”

Efficient numerical schemes for gradient vector flow

“…Several researchers pointed out this limitations and proposed alternatives solutions to increase the capture range of the external force (see eg. [2,3]). Recent works have also the ability to capture concavities.…”