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Custom shaders for volume rendering and data processing on GPU

Key Investigators

Kyle Sunderland (Queen's University, Canada)
Steve Pieper (Isomics)
Andras Lasso (Queen's University, Canada)

Project Description

Objective

Make custom GLSL shader pipelines available in Slicer for:
- Custom volume rendering effects
- GPU-accelerated image processing

Approach and Plan

Progress made at last project week
Evaluate vtkGPUImageData based filters (Source)

Progress and Next Steps

Implemented GLSL based bilateral filter
Started implementing infrastructure required for rendering to multiple targets in order to support GPU growcut algorithm

Result

Approach	Result
SimpleITK bilateral filter:	8 min 36 seconds
GLSL bilateral filter:	1.5 seconds
Speedup:	344x

Illustrations

Example of vtkGPUShaderAlgorithm pipline (ShaderAlgorithm)

Philips 3D US	Chroma-depth in PRISM	Depth peeling in PRISM

Background and References