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I have photographs of rectangular images that I would like to "flatten" so that they are truly rectangular, rather than the distorted view that comes from a photograph. I know this is something I should be able to Google, but I can't think of a technical term to describe what I mean (it's the process that scanner apps routinely do, essentially "flattening" the photograph).

Can anyone point me in the direction of a tool (perhaps within Illustrator or Photoshop) that will easily take an angled photograph of a rectangular poster and distort it to become a true rectangle again, please?

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I don't know Illustrator, but in Photoshop you would use the Perspective Crop Tool

enter image description here

Drag a rectangle from one corner to the opposite, then grab the other corners & move into place.

Ignore the quality of the shot, very high iso in dimly lit room & I don't have anything you could describe as a 'poster' on my walls ;)

enter image description here

Which gives you…

enter image description here

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    I always forget about the perspective crop, it really is exceptionally useful! – Alith7 Jan 11 at 16:13
  • @Alith7 - As I seem to spend an inordinate amount of time on SE squaring up other people's phone snaps of their on-screen computer errors, I do get to use it quite a lot ;) – Tetsujin Jan 11 at 16:16
  • I can see that! LOL – Alith7 Jan 11 at 19:20

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