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 Moderated by: chrisbet,  
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richw



Joined: Wed Apr 11th, 2012
Location: Melbourne, Australia
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I did a three day visit to Paris in my trip back home, mainly because Jackie (my wife) having grown up in Australia has never visited anywhere in Europe and was desperate to visit Paris.

I need some tips on getting rid of keystoning in Photoshop (too late in camera as I am back now).

Below is a stitched image of Notredame.



jk



Joined: Mon Apr 2nd, 2012
Location: Carthew, Cornwall, United Kingdom
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I'm sure that Eric has a great method but I think he is busy at present.

If you show the grid in PS then make sure that the grid is not too fine.

Then select all image then do an Edit Image Distort as a starter this allows you to take each image corner.  Select arrow end rotate until parts of buildings in that section align with grid, continue round the corners and distort until you get the building verticals aligning with the grid.
Then you can use in CS6 the Content Aware Fill (CAF) to fill in the missing bits or crop them out. I prefer to use CAF these days.

Eric



Joined: Thu Apr 19th, 2012
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richw wrote: I did a three day visit to Paris in my trip back home, mainly because Jackie (my wife) having grown up in Australia has never visited anywhere in Europe and was desperate to visit Paris.

I need some tips on getting rid of keystoning in Photoshop (too late in camera as I am back now).

Below is a stitched image of Notredame.



Well this image is more barrelling distortion than keystoning.

I am afraid I dont have a quick or even ideal fix!


I have in the past, used CS Filter>Lens Correction or Distort> Pinch/Spherize, followed by Image>Transform>Warp on images like this. But there is some loss of definition using them, so you need to work on high res and sharpen afterwards.


Personally I would do any corrections on each frame before stitching... to help the software's interpretation.






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