Hi Steve, I don't know if what you describe can be achieved in Paraview, but actually you can do it easily with VolView [1] (another - bt not open-source - Kitware software). Volume rendering is a standard technique for visualising X-Ray Computed Tomography data. If you find out out to do this in Paraview, please share your knowledge!
Cheers Gilly [1] http://www.kitware.com/products/volview.html On 15/07/2010, at 4:37 PM, Steve Huntley wrote: > According to the Paraview FAQ, Paraview supports volume rendering of > image data. But despite searching the Web and buying the Paraview book, > I have not been able to find any detailed descriptions of this feature, > let alone directions for or examples of how to do it. > > I have several image stacks in png format which represent slices of > 3-dimensional objects. I can convert an image stack into a vtk file and > open the file in Paraview, but after that I'm at a loss. Is it possible > to do a volume rendering and end up with a photorealistic image of the > reconstructed 3D object? > > After opening the vtk file created from the image stack and choosing > volume representation, all I see is a black block. The black is > evidently the background image area surrounding my 3D object. I would > like to make the black transparent and thus reveal the object, but it > seems to me that creating a custom color scale to control opacity would > result in color mapping and interpolation which would destroy much of > the original color in my image. Is there a way to declare a single > color transparent without affecting the other colors in the image? Is > this a valid way to pursue volume rendering of image data? > > Up to now I have been using Osirix to reconstruct 3D objects from stacks > of slices and do photorealistic renderings of them. But Osirix has not > been able to handle my larger image sets without crashing, and I would > also like to be able to script the process, as well as take advantage of > Paraview's parallel processing capabilities. > > Is it possible to accomplish something like Osirix's 3D reconstructions > in Paraview? > > > Thanks, > Steve Huntley > _______________________________________________ > Powered by www.kitware.com > > Visit other Kitware open-source projects at > http://www.kitware.com/opensource/opensource.html > > Please keep messages on-topic and check the ParaView Wiki at: > http://paraview.org/Wiki/ParaView > > Follow this link to subscribe/unsubscribe: > http://www.paraview.org/mailman/listinfo/paraview _______________________________________________ Powered by www.kitware.com Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html Please keep messages on-topic and check the ParaView Wiki at: http://paraview.org/Wiki/ParaView Follow this link to subscribe/unsubscribe: http://www.paraview.org/mailman/listinfo/paraview
