Display of Surfaces from Volume Data
IEEE Computer Graphics and Applications
Fast volume rendering using a shear-warp factorization of the viewing transformation
SIGGRAPH '94 Proceedings of the 21st annual conference on Computer graphics and interactive techniques
I3D '95 Proceedings of the 1995 symposium on Interactive 3D graphics
Intelligent scissors for image composition
SIGGRAPH '95 Proceedings of the 22nd annual conference on Computer graphics and interactive techniques
SIGGRAPH '96 Proceedings of the 23rd annual conference on Computer graphics and interactive techniques
Proceedings of the 25th annual conference on Computer graphics and interactive techniques
High quality rendering of attributed volume data
Proceedings of the conference on Visualization '98
The VolumePro real-time ray-casting system
Proceedings of the 26th annual conference on Computer graphics and interactive techniques
HWWS '00 Proceedings of the ACM SIGGRAPH/EUROGRAPHICS workshop on Graphics hardware
VVS '00 Proceedings of the 2000 IEEE symposium on Volume visualization
SIGGRAPH '88 Proceedings of the 15th annual conference on Computer graphics and interactive techniques
Optical Models for Direct Volume Rendering
IEEE Transactions on Visualization and Computer Graphics
IEEE Computer Graphics and Applications
SIGGRAPH '84 Proceedings of the 11th annual conference on Computer graphics and interactive techniques
Marching through the Visible Man
VIS '95 Proceedings of the 6th conference on Visualization '95
Interactive visualization of large scalar voxel fields
VIS '92 Proceedings of the 3rd conference on Visualization '92
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This paper presents a real-time ray casting rendering algorithm for "volume clipping plane" as an extension of the conventional ray casting technique. For each viewing direction a (moderate) pre-processing step is performed: the ray traverses the entire volume data (no early ray termination). Its intensity and opacity contributions are divided into several segments which are then sorted and stored by depth. At each sampling position along a segment, accumulated transparency and color are stored at a moderate memory overhead. For visualizing real-time volume clipping, only relevant segment contributions (maximum two) at the location of the clipping plane are considered, thus reducing the calculation to meet real-time requirements. Compared with the previous work that involves time-consuming re-clipping, re-traversing and re-shading, the proposed method achieves quality identical to ray casting at real-time speed. The performance is independent of the volume resolution and/or the number of clipping planes along a given viewing direction. Therefore it is suitable for real-time "internal volume inspections", involving one or several cutting planes, typically applied e.g., in medical visualization and material testing applications.