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Gradient Vector Flow Snake

Gradient Vector Flow Snake. C. Xu and J. L. Prince Project by Charlie Neo. Problem Description. Finding Object Boundaries Snake (Active Contour) Initialization problem Poor convergence to boundaries concavities

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Gradient Vector Flow Snake

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  1. Gradient Vector Flow Snake C. Xu and J. L. Prince Project by Charlie Neo

  2. Problem Description • Finding Object Boundaries • Snake (Active Contour) • Initialization problem • Poor convergence to boundaries concavities • C. Xu and J. L. Prince, ``Snakes, Shapes, and Gradient Vector Flow,'' IEEE Transactions on Image Processing, 7(3), pp. 359-369, March 1998.

  3. Algorithm (GVF) • Edge map f (x,y) from Image • Gradient vector flow field • That minimizes energy function • GVF can be found by solving Euler equation as a function of time

  4. Implementation • Setup the iterative solution

  5. Implementation cont. • Force balance equation. • Using GVF field as the internal force.

  6. Testing

  7. Testing

  8. Testing

  9. Testing

  10. Testing

  11. Testing

  12. Future Work • Better initialization method. • Optimization.

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