文档介绍：Research and realization of virtual endoscopy
Peng Yang-jun, Zhao Wei-dong, LU Xin-ming Shi Jiao-ying
College of Information Science and Engineering, Shandong State Key Laboratory of CAD&CG, Zhejiang University
University of Science and Technology Hangzhou, China
Qingdao, China ******@.
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Abstract—Research and realization technologies of virtual
endoscopy are proposed in this paper. We use boundary model II. LOCAL FEATURE STRUCTURE SEGMENTATION BASED
and local feature structure to realize tissue segmentation. A new ON BOUNDARY MODEL
efficient algorithm is presented to solve path planning based on Define 1 Boundary voxel set B: Given a data set and an
distance transform. As for real-time processing, a frame in object O defined in the inner of the 3D data set, there is a
virtual endoscopy is divided into near viewpoint part and far
segmentation function Q. Q can divide the data set into two
viewpoint part based on volume data characteristics in our
method. In the aspect of scene rendering, a ray casting algorithm subsets, one is a subset of the inner of O and the other is a
based on the boundary voxel is proposed. We can voyage in subset of the outer of O. A voxel is called boundary voxel, if
virtual endoscopy system in real time with high quality images to some of its contiguous six voxels are in the inner of O and
use these