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I have a point-and-shoot camera with which I made multiple high-resolution, but not raw images of about the same scene - I didn't use a tripod, so the camera moved slightly.

It is an open place where I want to remove tourists / dogs / cars from.

I have seen this question from 2012 about Photoshop.

I would like to do pretty much, the same, but with software that runs on Linux (Ubuntu 18.04).

Example scene:

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    AFAIR there was some article on how to do that with GIMP. Though most of those describe how to do it on a simgle image using the Resynthesize filter. Maybe this tutorial on merging images in GIMP could serve as a starting point? – Izzy Dec 9 '18 at 13:38
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    I know one way ow to do it with gimp. That would, however, easilytake about 30 minutes per scene: (1) Aligning all photos would take about 15min (2) Searching the right crop (3) adjusting colors at the borders. I don't think gimp is the right tool for the job. – Martin Thoma Dec 9 '18 at 15:45
  • Was just an idea. I know on Android, Almalence's Better Camera has that feature. So if replacing your point-and-shoot by an Android device is an option, that would be worth a try (I haven't tried the feature there myself, I just know it was advertized). – Izzy Dec 9 '18 at 21:48
  • Can't Martin just import his photos to an Android device & run the app? – Mawg says reinstate Monica Dec 10 '18 at 13:59
  • I have no conclusive suggestions, but this sounds like something that might be possible with OpenCV, possibly with some pre/post processing using ImageMagick. – Austin Hemmelgarn Dec 10 '18 at 19:28
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You can use median blending. The G'MIC plugin for GIMP has it, or you can use ImageMagick.

convert *.jpg -evaluate-sequence median OUT.jpg 

The images need to be aligned. You can use align_image_stack. It's also helpful to use a tripod when taking the pictures.

See Pat David: Noise Removal in Photos with Median Stacks (GIMP/G'MIC & Imagemagick)

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