[Paraview] Background: trim, transparent?

[Nico Schlömer]

Oh yes, I mean, you can autotrim with imagemagick as well, for example by

   mogrify -path ./destination -format png -trim *.png

This is for a batch job in fact; for single images, gimp certainly
comes in handy, particularly because you can select the background and
make it transparent there. This is not batchable though I believe.

Cheers,
Nico



On Fri, Dec 17, 2010 at 7:47 PM, burlen <burlen.loring at gmail.com> wrote:
> Hi,
>
> ParaView doesn't currently do this (unless its implemented in the
> development version which I haven't used in a while).
>
> A quick and dirty approach is with the ImageMagick suite. Another option is
> the GIMP scriptfu. In either case one can apply the desired operations to an
> image or a series of images generated in PV from the command line. I'm
> partial to the GIMP because it offers so much more functionality than
> ImageMagick. I am including a scriptfu I wrote to autocrop images from PV.
> It's in 2 parts, a bash script that hides some of the nastyness of invoking
> a scriptfu from the command line, and a scm scriptfu. Place the scm scriptfu
> in ~/gimp-X.X/scripts . X.X is the GIMP version number on your system. That
> should get you started.
>
> Burlen
>
> fist file: sq-auto-crop.sh
>
> #!/bin/bash
>
> if [ $# -ne 2 ] ; then
>  echo "Usage: $0 infile outfile"
>  exit 1
> fi
>
> gimp -i -b "(sq-auto-crop \"$1\" \"$2\")" -b '(gimp-quit 0)'
>
> #EOF
>
>
>
> second file: sq-auto-crop.scm
>
> ;------------------------------------------------------------------------------
> (define
>  (sq-auto-crop inFile outFile)
>    (let*
>      (
>      (im   0)
>      (dw   0)
>      )
>
>      ; load the original
>      (set! im (car (gimp-file-load RUN-NONINTERACTIVE inFile inFile)))
>      (set! dw (car (gimp-image-get-active-layer im)))
>
>      ; auto-crop
>      (plug-in-autocrop RUN-NONINTERACTIVE im dw)
>
>      ; save the cropped image
>      (gimp-file-save RUN-NONINTERACTIVE im dw outFile outFile)
>    )
> )
>
> ;EOF
>
> On 12/16/2010 04:43 PM, Nico Schlömer wrote:
>>
>> Hi all,
>>
>> for Paraview's "Save Screenshot" or "Save Animation", is it possible
>> to trim the resulting image to to get rid of the unnecessary
>> background, and even more so, to treat the background color as
>> "transparent" (e.g. when exporting to PNG)?
>>
>> Cheers,
>> Nico
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