Title :
Spatio-temporal analysis of nonrigid motion from 4D data
Author :
Nastar, Chahab ; Ayache, Nicholas
Author_Institution :
Inst. Nat. de Recherche en Inf. et Autom., Le Chesnay, France
Abstract :
Presents a method for analysis of nonrigid motion in time sequences of volume images (4D data). In this method, nonrigid motion of the deforming object´s 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 of the time signals of the main deformation spectrum components, which provides a temporal smoothing. Thus, a complex nonrigid deformation displayed in 4D data is described by very few parameters: the main excited spatial modes and the main Fourier harmonics. Therefore, 4D data can be analyzed and reduced in a very efficient way. The power of the approach is illustrated by results on 4D heart-scan data
Keywords :
Fourier analysis; cardiology; data analysis; data reduction; deformation; image sequences; motion estimation; 4D data analysis; 4D data reduction; 4D heart-scan data; Fourier analysis; Fourier harmonics; deformable surface; deformation spectrum components; deforming object contour; dynamic approximation; excited spatial modes; modal analysis; nonrigid motion; spatial smoothing; spatiotemporal analysis; temporal smoothing; time sequences; time signals; volume images; Computer vision; Deformable models; Heart; Image analysis; Image motion analysis; Image sequence analysis; Modal analysis; Motion analysis; Signal analysis; Smoothing methods;
Conference_Titel :
Motion of Non-Rigid and Articulated Objects, 1994., Proceedings of the 1994 IEEE Workshop on
Conference_Location :
Austin, TX
Print_ISBN :
0-8186-6435-5
DOI :
10.1109/MNRAO.1994.346243
