[Paraview] Background: trim, transparent?

[burlen]

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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