Deformable spatio-temporal shape models: extending active shape models to 2D+time

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Ghassan Hamarneh, Tomas Gustavsson

Published: 2004, Last Modified: 27 Sept 2024Image Vis. Comput. 2004EveryoneRevisionsBibTeXCC BY-SA 4.0
Abstract: This paper extends 2D active shape models to 2D+time by presenting a method for modeling and segmenting spatio-temporal shapes (ST-shapes). The modeling part consists of constructing a statistical model of ST-shape parameters. This model describes the principal modes of variation of the ST-shape in addition to constraints on the allowed variations. An active approach is used in segmentation where an initial ST-shape is deformed to better fit the data and the optimal proposed deformation is calculated using dynamic programming. Segmentation results on both synthetic and real data are presented.