A wavelet-frame based image force model for active contouring algorithms.
This paper proposes a directional image force (DIF) for active contouring. DIF is the inner product of the zero crossing strength (ZCS) of wavelet frame coefficients, and the normal of a snake, by representing strength and orientation of edges at multiple resolution levels. DIF markedly improves the immunity of snakes to noise and convexity.
Wu
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HH
Liu
J C
JC
Chui
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