Abstract
We present a method for analysis of nonrigid motion in time sequences of volume images (4D data). In this method nonrigid motion of the deforming object contour is dynamically approximated by a deformable surface. In order to reduce the number of parameters describing the deformation, we make use of modal analysis which provides a spatial smoothing of the surface, and Fourier analysis on time signals of the main deformation spectrum components, which provides a temporal smoothing. Thus, a complex dynamic deformation is represented by very few parameters: the main excited spatial modes and the main Fourier harmonics. Therefore, 4D data can be analyzed and compressed in a very efficient way. The power of the approach is illustrated by results on a 4D scan heart data.
This work was done while the author was at INRIA Rocquencourt, B.P. 105, 78153 Le Chesnay Cédex, France.
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© 1995 Springer-Verlag Berlin Heidelberg
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Nastar, C., Ayache, N. (1995). Time representation of deformations: Combining vibration modes and Fourier analysis. In: Hebert, M., Ponce, J., Boult, T., Gross, A. (eds) Object Representation in Computer Vision. ORCV 1994. Lecture Notes in Computer Science, vol 994. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-60477-4_19
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DOI: https://doi.org/10.1007/3-540-60477-4_19
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