[Ves] ves kiwi visualisation pipelines

[Wright James (NHS Greater Glasgow & Clyde)]

Hi Pat,

Yes I had seen those files, but what I can't see is where the head.vti file would be used as a parameter to access the methods of vesKiwiImagePlaneRepresentation.

Re. not being able to use vtk 's rendering classes, does that mean that volume rendering using for example a VolumeRaycastMapper is not possible?

thanks for your help


Jamie Wright | Clinical Scientist | Nuclear Medicine | NHSGGC (Southern General and Glasgow Royal Infirmary)
jamie.wright at nhs.net
________________________________________
From: Pat Marion [james.patrick.marion at gmail.com]
Sent: 03 June 2014 23:11
To: Wright James (NHS Greater Glasgow & Clyde)
Cc: ves at public.kitware.com
Subject: Re: [Ves] ves kiwi visualisation pipelines

Hi Jamie,

Have you looked at vesKiwiImagePlaneDataRepresentation and vesKiwiImageWidgetRepresentation?

For contouring, you can use the vtkContourFilter on a vtkImageData and get a vtkPolyData result.  The vtkPolyData is rendered using vesKiwiPolyDataRepresentation.  Tthe vesKiwiImagePlaneDataRepresentation is a subclass of vesKiwiPolyDataRepresentation, it takes a 2d vtkImageData and renders it as a textured quad.  For coloring, see line 120 in vesKiwiImagePlaneDataRepresentation.  It uses a vesKiwiColorMapCollection class, which is basically just a container of preferred color maps.  If no preferred color map is set, then you see on line 122 it defaults to a grayscale map.  The color map can be any subclass of vtkScalarsToColors, so that includes a vtkColorTransferFunction is that's what you want to use.

In general, you can use any vtk data filters in ves/kiwi, but you can't use vtk's rendering classes and widgets, because of the OpenGL ES 2.0 requirement.  Your processing pipeline should eventually generate vtkPolyData to be rendered.

Pat




On Tue, Jun 3, 2014 at 5:51 PM, Wright James (NHS Greater Glasgow & Clyde) <jamie.wright at nhs.net<mailto:jamie.wright at nhs.net>> wrote:
Dear All,

I am looking through the vesKiwi*.cpp source code in an attempt to figure out the various visualisation pipelines used on the inbuilt datasets on KiwiViewer. I cannot find where the visualisation pipelines take place on each of the inbuilt datasets.

For Example, in VTK desktop for the headCT dataset I would use something like vtkImagePlaneWidget() to slice the data into the three orthogonal planes, a vtkColorTransferFunction() to set the color table to greyscale, and a vtkContourFilter() to extract the isosurface. But I don't seem to be able to find this pipeline in the kiwi source files.

Any help on understanding how each of the datasets are processed would be appreciated



Jamie Wright | Clinical Scientist | Nuclear Medicine | NHSGGC

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