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I am facing a though challange - I need to perform repetitive Image formating. Firstly, I need resize picture A so that it has some fixed width in pixels. Then, I need to place picture A in the middle of picture B. I need to perform this task repetitively for hundreds of images. Is there any way to script this, so that I can just type in for example:

perform pictureA.png pictureB.png output.png

Any help is more than welcome!

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ImageMagick is a set of command-line tools that can do the sort of things you describe. For example, this command line will overlay picture B with a centered copy of picture A, resized to 100 pixels wide (keeping aspect ratio):

convert pictureB.png ( pictureA.png -resize 100 ) -gravity center -composite output.png

See the ImageMagick docs for more info about its command lines are structured...it's a powerful piece of software, but it takes a bit of work to get the hang of how to use it.

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    $\begingroup$ Just out of curiosity didnt we agree that software recommendations are offtopic? I dont nesseserily mind but... $\endgroup$ – joojaa Jan 24 '16 at 1:21
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    $\begingroup$ @joojaa The question is about using scripting to automate image operations, which seems on-topic and generally useful to me. Moreover I don't think I should hold back my answer just because it refers to some external software. $\endgroup$ – Nathan Reed Jan 24 '16 at 3:04
  • $\begingroup$ Love you man. You saved so much of my time :) Hope you have a great day! $\endgroup$ – uksz Jan 24 '16 at 8:27
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    $\begingroup$ No thats not nesseserily what im saying, im just pointing out that have closed questions of simililar nature due to them being software recommendations. $\endgroup$ – joojaa Jan 24 '16 at 8:40
  • $\begingroup$ The question is about a scripting tool, perhaps making it an "API recommendation" question? It would probably be at home in game development. Maybe I've got a meta meta question here - can questions be recommended for transfer to or crossposted on other stack exchange sites? $\endgroup$ – Daniel M Gessel Jan 26 '16 at 12:53

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