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How to crop multiple pictures for a time-lapse so they fit over each other perfectly?

Photography Asked on December 23, 2020

Yesterday I slipped with my bicycle and scraped my knee pretty badly. To make the best out of it, I decided to take a picture of it every 6 hours and make it into a time-lapse kind of slideshow to get a closer look on the healing process. I’ll probably do it for around a week, which would make about 30 pictures.

I set up a tripod and chair to keep the perspective the same, but of course I can’t position my knee perfectly every single time, so I’ll have to slightly crop the pictures afterwards so they all line up with each other perfectly.

How could I do that? What software/workflow is a quick way to exactly crop my pictures? I assume using something like a semi-transparent layer in Photoshop to put one image over each of the others could work, but it would be pretty annoying to do 30 times in a row. Anyone knows a more smart/economic solution?

One Answer

Panorama applications can usually auto-align a stack of photos since this is a special case of the adjustments needs for correct stitching.

For instance how you can use Hugin for this is shown here.

To get to the interface used in the guide, go to View -> Panorama editor. Also make sure Interface in the menu bar is set to Expert, or the Remapped Images section used in the last step will not be visible.

Correct answer by xenoid on December 23, 2020

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