[Paraview] [EXTERNAL] Assign colors to brain fibers

[David E DeMarle]

You might try:

You could probably do it at the python programmable filter level by making
use of the http://vtk.org/doc/nightly/html/classvtkLookupTable.html (esp
MapValue()) class to manually create another array for the data that
contains the colors at each point/cell.

File export, which saves the visible scene into a couple of other formats
in which I think the color is recorded on every primitive.

Otherwise, Display->Edit Color Map...->Save->Export will let you save the
color transfer function into an xml file that you could probably get into
some other tool and thus recreate the same colors.

But as Ken says there is no convenient way today to save to colors along
with the geometry.

David E DeMarle
Kitware, Inc.
R&D Engineer
21 Corporate Drive
Clifton Park, NY 12065-8662
Phone: 518-881-4909


On Mon, Jan 9, 2012 at 10:48 AM, Rafa x <rromero3000 at gmail.com> wrote:

> Yes, the id is available to color by after the 5 steps. However, the
> mapColor showed is the last used in Paraview not the mapColor saved in
> the previous process. For that reason I have supposed that mapColor
> information is not saved in the vtk. Do you know some way to store the
> mapColor in the vtk file to allow that other DTI programs can
> interpret it?
>
> El día 9 de enero de 2012 16:34, David E DeMarle
> <dave.demarle at kitware.com> escribió:
> > Once you:
> > 1)load original data
> > 2)apply ids filter
> > 3)select ids filter in pipeline browser
> > 4)save as Legacy VTK files,
> > and
> > 5)load that new file back in to ParaView,
> > is the new "Ids" variable not available to color by?
> >
> > David E DeMarle
> > Kitware, Inc.
> > R&D Engineer
> > 21 Corporate Drive
> > Clifton Park, NY 12065-8662
> > Phone: 518-881-4909
> >
> >
> >
> > On Mon, Jan 9, 2012 at 10:27 AM, Rafa x <rromero3000 at gmail.com> wrote:
> >>
> >> Thanks but I need like to save in a format where the 586 elements can
> >> be separately identified by other program (like .vtk). However, when I
> >> save my new colors using .vtk and after that I load the same file,
> >> using paraview too, my colors disappear. So I suppose that color
> >> information is not saved in the vtk file. Thus, I would need to save
> >> in a vtk maintaining the display showed in the paraview, Is that
> >> possible?
> >>
> >> El día 9 de enero de 2012 16:13, Moreland, Kenneth <kmorel at sandia.gov>
> >> escribió:
> >> > File -> Save Screenshot
> >> >
> >> > -Ken
> >> >
> >> >
> >> >
> >> > On 1/9/12 4:02 AM, "Rafa x" <rromero3000 at gmail.com> wrote:
> >> >
> >> >>Thank you for your quick and useful answer. It works perfectly. I
> >> >>would like to make you a final question: Can I save the image
> >> >>maintaining the colors visualization in a file format that can be read
> >> >>by other programs?
> >> >>
> >> >>El día 5 de enero de 2012 20:49, Moreland, Kenneth <kmorel at sandia.gov
> >
> >> >>escribió:
> >> >>> Try applying the Generate Ids filter and then color the result by
> the
> >> >>>Ids
> >> >>> cell field (not the point field).  The colors won't exactly be
> >> >>>arbitrary,
> >> >>> but if you switch to the rainbow color map you'll get something
> fairly
> >> >>> close.
> >> >>>
> >> >>>
> >> >>> -Ken
> >> >>>
> >> >>> On 1/5/12 8:43 AM, "Rafa x" <rromero3000 at gmail.com> wrote:
> >> >>>
> >> >>>>Dear All,
> >> >>>>I have a .vtk file with 586 elements (DTI streamlines which
> represent
> >> >>>>brain fibers). I would like to represent it assigning an arbitrary
> >> >>>>color to each these 586 elements.
> >> >>>>
> >> >>>>Thank you all in advance,
> >> >>>>Rafael Romero.
> >> >>>>_______________________________________________
> >> >>>>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:
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> >> >>>>
> >> >>>
> >> >>>
> >> >>
> >> >
> >> >
> >> _______________________________________________
> >> Powered by www.kitware.com
> >>
> >> Visit other Kitware open-source projects at
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> >>
> >> Please keep messages on-topic and check the ParaView Wiki at:
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