Display of Surfaces from Volume Data
IEEE Computer Graphics and Applications
Shape transformation for polyhedral objects
SIGGRAPH '92 Proceedings of the 19th annual conference on Computer graphics and interactive techniques
Topological evolution of surfaces
GI '96 Proceedings of the conference on Graphics interface '96
Virtual voyage: interactive navigation in the human colon
Proceedings of the 24th annual conference on Computer graphics and interactive techniques
Surfels: surface elements as rendering primitives
Proceedings of the 27th annual conference on Computer graphics and interactive techniques
QSplat: a multiresolution point rendering system for large meshes
Proceedings of the 27th annual conference on Computer graphics and interactive techniques
CEASAR: a smooth, accurate and robust centerline extraction algorithm
Proceedings of the conference on Visualization '00
Nonlinear virtual colon unfolding
Proceedings of the conference on Visualization '01
A Near Optimal Isosurface Extraction Algorithm Using the Span Space
IEEE Transactions on Visualization and Computer Graphics
Speeding Up Isosurface Extraction Using Interval Trees
IEEE Transactions on Visualization and Computer Graphics
Penalized-Distance Volumetric Skeleton Algorithm
IEEE Transactions on Visualization and Computer Graphics
BIOMEDVIS '95 Proceedings of the 1995 Biomedical Visualization (BioMedVis '95)
EGVISSYM'01 Proceedings of the 3rd Joint Eurographics - IEEE TCVG conference on Visualization
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Unfold rendering enables us to understand the internal structure of organs more precisely. The most commonly used unfolding method is to cast rays radially along a pre-computed camera path. However, this may produce images of false pathological structures. Details on the organ surface may be lost when the organ's curvature is relatively large due to adjacent ray planes crossing. Several methods are presented to avoid the penetration of ray planes. These methods result in severe computational overhead. We propose an efficient method of penetration-free ray casting for unfolding. It computes ray planes that do not intersect neighboring planes, using the noble intersection avoidance method. It determines the direction of all the rays fired from intermediate sampling points, by linearly interpolating the direction of the rays on two of the original ray planes. Experimental results show that it does not produce erroneous images since it exploits simple linear interpolation.