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<TITLE>Re: [Paraview] How to do volume rendering of image data?</TITLE>
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<FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'>Steve,<BR>
<BR>
Your approach is correct. I don’t know why you are seeing what you describe. How are you coloring your data?<BR>
<BR>
-Ken <BR>
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On 7/15/10 4:37 AM, "Steve Huntley" <<a href="stephen@xhuntley.net">stephen@xhuntley.net</a>> wrote:<BR>
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</SPAN></FONT><BLOCKQUOTE><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'>According to the Paraview FAQ, Paraview supports volume rendering of<BR>
image data. But despite searching the Web and buying the Paraview book,<BR>
I have not been able to find any detailed descriptions of this feature,<BR>
let alone directions for or examples of how to do it.<BR>
<BR>
I have several image stacks in png format which represent slices of<BR>
3-dimensional objects. I can convert an image stack into a vtk file and<BR>
open the file in Paraview, but after that I'm at a loss. Is it possible<BR>
to do a volume rendering and end up with a photorealistic image of the<BR>
reconstructed 3D object?<BR>
<BR>
After opening the vtk file created from the image stack and choosing<BR>
volume representation, all I see is a black block. The black is<BR>
evidently the background image area surrounding my 3D object. I would<BR>
like to make the black transparent and thus reveal the object, but it<BR>
seems to me that creating a custom color scale to control opacity would<BR>
result in color mapping and interpolation which would destroy much of<BR>
the original color in my image. Is there a way to declare a single<BR>
color transparent without affecting the other colors in the image? Is<BR>
this a valid way to pursue volume rendering of image data?<BR>
<BR>
Up to now I have been using Osirix to reconstruct 3D objects from stacks<BR>
of slices and do photorealistic renderings of them. But Osirix has not<BR>
been able to handle my larger image sets without crashing, and I would<BR>
also like to be able to script the process, as well as take advantage of<BR>
Paraview's parallel processing capabilities.<BR>
<BR>
Is it possible to accomplish something like Osirix's 3D reconstructions<BR>
in Paraview?<BR>
<BR>
<BR>
Thanks,<BR>
Steve Huntley<BR>
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