NA-MIC Project Weeks
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Programmable MultiVolume Rendering Project
Key Investigators
- Simon Drouin (MNI)
- Csaba Pinter (Queen’s)
- Steve Pieper (Isomics)
- Jean-Christophe Fillion-Robin (Kitware)
Project Description
Objective
- Review the newly exposed GLSL hooks in VTK as a mechanism to add features to Slicer’s Volume Rendering
- Possible features to explore
- Optimized performance/quality for multiple overlapping volumes
- Custom clipping or other rendering features
- Adding nonlinear deformations
Approach and Plan
- Review what’s new since we discussed this last year
- New VTK version and classes
- New Slicer GUI
- Other GLSL examples that we can draw from
- IBIS / PRISM
- STEP
- Document existing functionality in the VTK wiki on this page and identify potential builtin variables and functions that could be added to facilitate the creation of new volumetric effects.
- Replicate the examples presented in the PRISM paper using the improved VTK mapper.
- Replicate the US heart rendering of Philips machine with data from Matt Joley.
Progress and Next Steps
- Provided a proof of concept (python script) for dynamic shader editing in Slicer (see image, video and link to script below)
- Started documenting the new volume rendering functionality of VTK here
- Suggested improvements:
- VTK: expose interface for setting custom uniform variables in vtkGPUOpenGLRaycastMapper
- Slicer: Build an interface to interactively edit shader code, visualize the complete shader and display shader compilation errors.
Proof of concept
Result
YouTube video of SlicerPRISM in action
Another video example, with DTI data
Illustrations
| Philips 3D US | Chroma-depth in PRISM | Depth peeling in PRISM |
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| Edge enhancement in PRISM | Decluttering in PRISM | Volume carving in PRISM |
|---|---|---|
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| Blood flow animation in PRISM | ||
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