Abstract:
Abstract{Due to considerable variations in sensor and tissue characteristics, design of automated methods that can correctly segment all input images is very dicult, if not impossible. Clinicians often nd it necessary to revise the result of an automatically determined segmentation. In this paper, a computer-aided design environmentisintroduced that enables quick and eective revision of segmented volumetric regions like revising 3-D free-form shapes. In the proposed environment, a region obtained by segmenting a volumetric image is approximated by a parametric surface. The user, by observing the overlaid surface and the original volumetric image, moves the control points of the surface to revise the segmentation. With the proposed environment, a user typically needs a few minutes to revise the result of a 3-D segmentation. Index Terms{Image segmentation, computer-aided design, rational Gaussian surface, volumetric image. 1
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