help with automatic cropping and merging of photos

new_user · **Joined:** Mar 29, 2011 **Posts:** 1

Hi, new to the forum and casual user of gimp.

I want to make two scripts that will automatically work on my pictures.
I have pictures generated by a program, the pictures are composed of mostly black background with a colored figure in it.
As you can see, it has a large white boundary, that boundary is added by the matlab save mechanism and I don't want it.
to remove it manually, what I do is click with the fuzzy select tool (magic wand) and Threshold 0 on the black background and then Image->Fit canvas to selection.
since I have many pictures of that type, I want a script that will do it automatically for me (and automatically save the result).

Secondly, I want a script that will take two existing images of the same dimensions and put them one along the other perfectly, again I have many pictures, so there are a lot of "couples" to combine and I can't align them perfectly straight with my hand.

*all the images are in .tif format, using gimp 2.6 under win 7 or win xp (have two machines).

All help will be appreciated.

ofnuts · **Joined:** Oct 25, 2010 **Posts:** 4812

You should investigate using the Imagemagick toolbox instead. Very powerful!

paynekj · **Posted:** Wed Mar 30, 2011 3:07 am **(#3)**

I think I understand the first part of your problem - removal of the white border, but can you confirm that doing Image>Autocrop Image does what you require? This should be quite straightforward to script using the plug-in-autocrop function.

Let's see if I understand your second requirement. You want to put two identically sized images side-by-side:

Code: Select all

   ----------|----------
  |          |          |
  |     1    |     2    |
  |          |          |
   ----------|----------

or do you mean vertically:

Code: Select all

   ----------
  |          |
  |     1    |
  |          |
   ----------
  |          |
  |     2    |
  |          |
   ----------

If I've understood that correctly, how do want to choose your pairs to join together?

Kevin

ofnuts · **Joined:** Oct 25, 2010 **Posts:** 4812

Three uses of ImageMagick "montage" command with the outputs.

montage -geometry '+0+0' -trim Original.png Original.png Montage.png
montage -geometry '+0+0' -trim -resize 20% Original.png Original.png MontageSmall.png
montage -geometry '+10+10' -background '#00FFFF' -label '%f' -trim -resize 20% Original.png Original.png MontageFancy.png

Original.png is you original image, with white border and all.

When your only tool is a hammer, all your problems look like nails.

Attachment:

MontageFancy.png [ 38.3 KiB | Viewed 2908 times ]

RobA · **Joined:** Jul 14, 2010 **Posts:** 697

Cross-eye stereo-grams rule!

-Rob A>