Snake : Active Contour

Snake Segmentation (Kass et al), 2D/3D including GVF and balloon force (Easy to read code)
Updated 8 Nov 2011

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These functions implements the basic snake segmentation contour, as introduced by Kass et al.

A snake is an active (moving) contour, in which the points are attracted by edges and other image boundaries. To keep the contour smooth, a membrane and thin plate energy is used as contour regularization.

All code is well commented, and is probably easy readable. It includes,
- A balloon force, which is not in the original paper
- Binary image segmentation result,
- The "Gradient Vector Flow" (GVF) method.
- 3D implementation, including parameter to keep the mesh from self-intersecting

Try the example in the help of function Snake.m !

- Michael Kass, Andrew Witkin and Demetri TerzoPoulos "Snakes Active Contour Models", 1987
- Jim Invins and John Porril, "Everything you always wanted to know about snakes (but were afraid to ask)
- Chenyang Xu and Jerry L. Prince, "Gradient Vector Flow: A New external force for Snakes
- Christoph Lurig, Leif Kobbelt, Thomas Ertl, "Hierachical solutions for the Deformable Surface Problem in Visualization"

Please report bugs, successes and other comments

Cite As

Dirk-Jan Kroon (2024). Snake : Active Contour (, MATLAB Central File Exchange. Retrieved .

MATLAB Release Compatibility
Created with R2010a
Compatible with any release
Platform Compatibility
Windows macOS Linux

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Version Published Release Notes

3D snake now uses the inverse internal forces matrix

Small, Interpolate Bug Fix

Yuanming Suo reported bugs in scaling of 3D Gaussian and Mu*4. Which are corrected in this version.

Solved 3D GVF bug, and increased 3D speed.

Added parameter to keep the mesh from self-intersecting

Also added a 3D implementation. Change line image force, to Gaussian smoothed line image force.

Added GVF. Changed some minor comment