3D watershed transformation on graphs

Susan Wegner; Helmut Oswald; Eckart Fleck

doi:10.1117/12.310951

24 June 1998 3D watershed transformation on graphs

Susan Wegner, Helmut Oswald, Eckart Fleck

Proceedings Volume 3338, Medical Imaging 1998: Image Processing; (1998) https://doi.org/10.1117/12.310951
Event: Medical Imaging '98, 1998, San Diego, CA, United States

Abstract

A 3D multiresolution segmentation approach based on a hierarchical watershed transformation (WST) on graphs for Computer Tomography images is presented. This approach is a 3D extension of the 2D WST on graphs which has already been successfully tested for the segmentation of CT images of the pelvis in hyperthermia planning. Analogous to the 2D technique the oversegmentation of the 3D WST is iteratively reduced through the application of the WST on graphs. Whereas for the 2D technique a stack of segmentation slices is constructed, here a stack of segmentation volumes consisting of 3D regions that correspond to 3D anatomical objects of different resolution in each volume are obtained. In contrast to the 2D approach which is at first applied on the image plane and hereinafter iteratively on graphs, the principle WST technique for graphs is now directly applied on the image plane. Besides the usage of a gradient with subpixel accuracy additionally a new procedure for the WST on this gradient is used. The labelled subpixel gradients are then used to label the voxels representing the segmentation result.

Citation Download Citation

Susan Wegner, Helmut Oswald, and Eckart Fleck "3D watershed transformation on graphs", Proc. SPIE 3338, Medical Imaging 1998: Image Processing, (24 June 1998); https://doi.org/10.1117/12.310951

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