IEEE Trans Image Process - Efficient registration of nonrigid 3-D bodies.

Tópicos

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Resumo

We present a novel method to perform an accurate registration of 3-D nonrigid bodies by using phase-shift properties of the dual-tree complex wavelet transform [Formula: see text]. Since the phases of [Formula: see text] coefficients change approximately linearly with the amount of feature displacement in the spatial domain, motion can be estimated using the phase information from these coefficients. The motion estimation is performed iteratively: first by using coarser level complex coefficients to determine large motion components and then by employing finer level coefficients to refine the motion field. We use a parametric affine model to describe the motion, where the affine parameters are found locally by substituting into an optical flow model and by solving the resulting overdetermined set of equations. From the estimated affine parameters, the motion field between the sensed and the reference data sets can be generated, and the sensed data set then can be shifted and interpolated spatially to align with the reference data set.

Resumo Limpo

present novel method perform accur registr d nonrigid bodi use phaseshift properti dualtre complex wavelet transform formula see text sinc phase formula see text coeffici chang approxim linear amount featur displac spatial domain motion can estim use phase inform coeffici motion estim perform iter first use coarser level complex coeffici determin larg motion compon employ finer level coeffici refin motion field use parametr affin model describ motion affin paramet found local substitut optic flow model solv result overdetermin set equat estim affin paramet motion field sens refer data set can generat sens data set can shift interpol spatial align refer data set

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