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| − | == Overview ==
| + | <big>'''Note:''' We are migrating this content to the slicer.org domain - <font color="orange">The newer page is [https://www.slicer.org/wiki/Slicer3:Volume_Rendering here]</font></big> |
| − | The topic of the new Volume Rendering Module is the integration of hardware accelerated volume rendering. There is a special focus of achieving interactive update rates, easy user interaction (e.g. by offering several presets) and the use of label maps. Goals also include incremental updates (if module is used with Editor module), saving and loading of the configuration etc.
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| − | ==Archtecture/Design== | |
| − | [[Image:UseCaseVolumeRendering.jpg|thumb|800px|center|Use Case Diagram]]
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| − | | |
| − | ==Test the module==
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| − | *Turn VolumeRenderingModule on (in cmake)
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| − | *Compile
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| − | | |
| − | ==Latest results and limitations==
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| − | ===Description===
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| − | *Loading changing of MRML-Nodes is possible during runtime
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| − | *At the moment no removing of MRML-Nodes possible
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| − | *Change properties (Shading, Interpolation, mapping)
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| − | *Calculate transfer functions automatically
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| − | *Performance:
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| − | **Interrupting is possible in render window.
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| − | **Interrupting somewhere else requires platform dependent coding (q.v. problems)
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| − | *Cropping is possible
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| − | | |
| − | ===Screenshots===
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| − | [[Image:VolumeRendering.jpg|thumb|500px|center|volume rendered label map of the tutorial dataset]]
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| − | [[Image:VolumeRenderingWithShading.jpg|thumb|500px|center|volume rendered label map of the tutorial dataset, shading enabled]]
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| − | [[Image:VolumeRenderingBoneDetection.png|thumb|800px|center|shading enabled, linear interpolation, automatich mapping for bones]]
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| − | | |
| − | ==next Tasks==
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| − | | |
| − | == Goals ==
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| − | | |
| − | Volume rendering presets :
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| − | * MIP (Maximum Intensity Projection)
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| − | **[http://en.wikipedia.org/wiki/Maximum_intensity_projection Wikipedia]
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| − | **[http://www.vtk.org/doc/release/5.0/html/a01399.html vtkFixedPointVolumeRayCastMapper Class Reference]
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| − | * CT Bone and vessel
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| − | **Use Hounsfield units
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| − | ***Bone +400->+1000
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| − | ***Soft tissue +40->+80
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| − | ***Water 0
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| − | ***Fat -60->-100
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| − | ***Lung -400->-600
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| − | ***Air -1000
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| − | **Problem with Vessels: Different contrast mediums?!
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| − | * T1 MR Air/skin interface
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| − | * Label map per-label object rendering
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| − | | |
| − | Slicer3 module interface:
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| − | * Select from loaded volumes
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| − | * Specify preset transfer functions or use KWWidgets tools
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| − | | |
| − | Slicer3 internals:
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| − | * Correct coordinates including transforms
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| − | * Level of detail rendering
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| − | * Proper integration with surface rendering
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| − | | |
| − | Different Volume Rendering Algorithms
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| − | *RayCast
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| − | *2D Texture Mapping
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| − | *3D Texture Mapping
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| − | *...
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| − | | |
| − | == Wish List ==
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| − | | |
| − | | |
| − | * 2D Transfer functions - may require specialized opengl code integrated with VTK. Talk with Gordon about latest work from Utah.
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| − | | |
| − | * use glTexSubImage3D so that incremental changes to the volume can be quickly reflected
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| − | | |
| − | * use distance maps (inlcude several components) in rendering
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