Active Contour Segmentation

Finds foreground and background regions using level sets and active contours.

Description

This code implements the well-known Chan-Vese segmentation algorithm from the paper "Active Contours Without Edges."

This technique deforms an initial curve so that it separates foreground from background based on the means of the two regions. The technique is very robust to initialization and gives very nice results when there is a difference between the foreground and background means.

This code uses active contours and level sets in the implementation. It could also serve as a good framework for implementing all kinds of region-based active contour energies.

1.) Download
2.) Unzip
3.) Run >>region_seg_demo

See this site for experiments, videos, and more information on segmentation, active contours, and level sets:

[ http://www.shawnlankton.com/2007/05/active-contours/ ]

• MATLAB release: MATLAB 7.4 (R2007a)
• Other Files: regionbased_seg/airplane.jpg, ; regionbased_seg/region_seg.m, ; regionbased_seg/region_seg_demo.m

[James Malcolm]

Great self-contained demo. It runs right out of the box, and is very fast.

[wang mian]

hi,profess,when I run it,it says:"Error in ==> region_seg at 70
      showCurveAndPhi(I,phi,its); ",
I don't know how to deal it.Could you tell me how should I do next please.
Thank you very much!!

[Puteri Sulaiman]

thank you, really helps a lot with my project.. been to your web site, also really usefull.. :)

[Mona Elshinawy]

I tried the code on mammograms and it was working but the 250 iterations were not enough at all to get the breast contour, I was trying to figure out what to change in your code to have larger steps for each iteration. I use very large images(ex.4069x2084).Your cooperation is greatly appreciated

[Mona Elshinawy]

 

[Jun.C ù]

 

[Ben Hon]