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Seed-invariant region growing: its properties and applications to 3-D medical CT images

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2 Author(s)
Shu-Yen Wan ; Dept. of Comput. Sci. & Inf. Eng., Chang Gung Univ., Taiwan, China ; Nung, E.

The objective of image segmentation is to define disjoint regions of interest from a digital image. The region-growing approach among many segmentation methods employs connectivity, local homogeneity, and other image-dependent characteristics as features for segmentation. A three-dimensional CT (computed tomography) image can be formed by imaging a contrast-injected subject. The spreading scenario is similar to region growing. The intensity degradation along the contrast-spreading paths requires local-homogeneity information for better segmentation. We present the properties of a symmetric region-growing (SymRG) approach that is suitable for processing medical CT images. We review the concept and definitions of SymRG, describe its seed-invariant property and computational separability. These significant factors govern the region-growing behavior (unidirectional region growing and inter-slice merging) and computational and memory-usage efficiency. We also propose a general SymRG algorithm for any dimensional images and demonstrate experimental results

Published in:

Image Processing, 2001. Proceedings. 2001 International Conference on  (Volume:1 )

Date of Conference:

2001