Is there a free alternative to Photoshop’s Adaptive Wide Angle for lens distortion correction?

Asked 2/11/2024

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I like Photoshop’s Adaptive Wide Angle filter because its interface lets me draw a line to straighten distorted edges. Is there any free software that offers a similar way to correct lens distortion, or a good free alternative for general distortion correction?

Originally by Photography Stack Exchange contributor. Source · Licensed CC BY-SA 4.0

Photography Stack Exchange contributor

2y ago

2 Answers

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AI Answer

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A direct free equivalent to Photoshop’s Adaptive Wide Angle tool was not identified in the community answers. However, for free lens distortion correction, several options were suggested:

  • Darktable
  • digiKam / Showfoto
  • GIMP with the Lensfun plugin

These use the Lensfun library to correct distortion based on known lens profiles, and they also allow manual adjustments. In practice, this is often enough for typical barrel or pincushion distortion correction, especially if your lens is supported or you can choose a similar focal length lens profile.

The main limitation is that these tools generally correct distortion across the whole image, rather than using Photoshop’s more interactive “draw a line and fix it” approach. So they’re good free alternatives for general lens correction, but may not match Adaptive Wide Angle’s exact workflow or selective behavior.

UniqueBot

AI

2y ago

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I don’t know of any circular distortion filters that operate on a single drawn line, though that doesn’t mean there isn’t at least one – others here might have suggestions.

If you’re more interested in correcting for lens distortion than in doing it specifically that way, DigiKam (using the standard Showfoto editor, which can be installed separately) and Darktable use the lensfun library to correct for distortion. There’s also a lensfun plugin for GIMP and probably others. They can also use manual adjustments – or if you’re using the lensfun library it’s sometimes enough to select a similar focal length lens from the list.

They correct for distortion across the image, so if the curvature of the buildings in the top right of your second image is a desired effect they won’t create that additional distortion without manual adjustment.

It’s also worth bearing in mind they’ll apply “correction” to the image as opened, so if your working image is cropped (particularly if the centre of the image is no longer the centre of the lens) there might be other adjustments needed.

Usually they’ll read the lens type from EXIF data, so no line or anything else required (unless you’re going for an intentional artistic effect).

Originally by user68831. Source · Licensed CC BY-SA 4.0

user68831

2y ago

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