We propose a pattern classification based approach for simultaneous three-dimensional (3-D) object modeling and segmentation in image volumes. The 3-D objects are described as a set of overlapping ellipsoids. The segmentation relies on the geometrical model and graylevel statistics, The characteristic parameters of the ellipsoids and of the graylevel statistics are embedded in a radial basis function (RBF) network and they are found by means of unsupervised training, 4 new robust training algorithm for RBF networks based on alpha-trimmed mean statistics is employed in this study. The extension of the Hough transform algorithm in the 3-D space by employing spherical coordinate system is used for ellipsoidal center estimation. We study the performance of the proposed algorithm and we present results when segmenting a stack of microscopy images.
|Number of pages||13|
|Journal||IEEE Transactions on Image Processing|
|Publication status||Published - Dec 1999|
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- alpha-trimmed mean
- radial basis function networks
- 3-D Hough transform
- RESONANCE BRAIN IMAGES
- 3-DIMENSIONAL SEGMENTATION