[Paraview] Paraview python script: passing images to PIL (python image library)

[David E DeMarle]

Unless you can rely on PIL being on the system search path yes.

In my case PIL is mostly optional so if you look closely you will see paths
that avoid PIL if not present when Catalyst writes out cinema files.



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

On Wed, Oct 12, 2016 at 2:22 PM, Albina, Frank <
frank.albina at sauber-motorsport.com> wrote:

> David,
>
> this leads me to another question. Looking at file raster_wrangler.py in
> lib/paraview-5.1/site-packages/paraview/cinemaIO, one tries to import
> PIL. However, even though numpy is provided by the SuperBuild, PIL is not.
> So I guess that I have to compile my own version of Python including PIL
> and pass it to the SuperBuild as system python installation. Is my
> assumption correct? Or have I been missing something?
>
> Cheers,
>
>
> Frank.
>
> *From:* ParaView [mailto:paraview-bounces at paraview.org] *On Behalf Of *Albina,
> Frank
> *Sent:* Mittwoch, 12. Oktober 2016 20:01
> *To:* David E DeMarle
> *Cc:* Del Citto, Francesco; paraview at paraview.org
>
> *Subject:* Re: [Paraview] Paraview python script: passing images to PIL
> (python image library)
>
>
>
> David,
>
>
>
> that’s excellent.
>
>
>
> Thanks a lot.
>
> Frank.
>
> *From:* David E DeMarle [mailto:dave.demarle at kitware.com
> <dave.demarle at kitware.com>]
> *Sent:* Mittwoch, 12. Oktober 2016 19:56
> *To:* Albina, Frank
> *Cc:* paraview at paraview.org; Del Citto, Francesco
> *Subject:* Re: [Paraview] Paraview python script: passing images to PIL
> (python image library)
>
>
>
> Look into the cinemaIO directory of ParaView. We move back and forth
> between paraview, numpy and PIL often there.
>
>
>
> For example:
>
> image = self.view.CaptureWindow(1)
>
> ext = image.GetExtent()
>
> width = ext[1] - ext[0] + 1
>
> height = ext[3] - ext[2] + 1
>
> imagescalars = image.GetPointData().GetScalars()
>
> idata = numpy_support.vtk_to_numpy(imagescalars)
>
> image.UnRegister(None)
>
> imageslice = idata.reshape(height, width, 3)
>
> imageslice = numpy.flipud(imageslice)
>
> pimg = PIL.Image.fromarray(imageslice)
>
>
>
> David E DeMarle
> Kitware, Inc.
> R&D Engineer
> 21 Corporate Drive
> Clifton Park, NY 12065-8662
> Phone: 518-881-4909
>
>
>
> On Wed, Oct 12, 2016 at 1:42 PM, Albina, Frank <frank.albina at sauber-
> motorsport.com> wrote:
>
> All,
>
> A simple question: my incentive is to manipulate images using PIL in a
> pvbatch script. At the time being, I am writing the images to file in PNG
> format and reading the file again from disc using PIL. I have found out
> that the underlying image writing is performed by the vtkPNGWriter class
> and that this class allows to write to memory (vtkPNGWriter.SetWriteToMemory).
> Hence my question: Is it possible to “write” a PNG file to memory so that I
> can  process it further using PIL? If so, how shall I proceed?
>
> Thank you very much in advance.
>
> Cheers,
>
> Frank.
>
>
> _______________________________________________
> 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
>
> Search the list archives at: http://markmail.org/search/?q=ParaView
>
> Follow this link to subscribe/unsubscribe:
> http://public.kitware.com/mailman/listinfo/paraview
>
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://public.kitware.com/pipermail/paraview/attachments/20161012/d08c6f9f/attachment.html>