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Mr Ed
 Post subject: curved image (how do I stretch)
PostPosted: Mon Jul 08, 2019 4:10 pm  (#1) 
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Joined: Jul 03, 2018
Posts: 38
GIMP Version: 2.8.14
Operating System: Linux
GIMP Experience: Intermediate Level


Hello to all.
I need experts help, I have a picture of a photo, the picture was taken with the photograph curved and I cannot modify to make it look flat (the contents are important, it is an old family photo). Can it be done without open heart surgery?


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racer-x
 Post subject: Re: curved image (how do I stretch)
PostPosted: Mon Jul 08, 2019 5:02 pm  (#2) 
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You can try "Lens Distortion" in the Filters>Distort menu.

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distort.jpg
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Tas_mania
 Post subject: Re: curved image (how do I stretch)
PostPosted: Mon Jul 08, 2019 6:20 pm  (#3) 
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A few more hints. Save as you go. Use the Colors > Curves tool to lighten a dark image. G'MIC > Details > Freaky Details can bring back some of the lost information :)
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ofnuts
 Post subject: Re: curved image (how do I stretch)
PostPosted: Tue Jul 09, 2019 4:07 am  (#4) 
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Joined: Oct 25, 2010
Posts: 4752
racer-x wrote:
You can try "Lens Distortion" in the Filters>Distort menu.

Attachment:
The attachment distort.jpg is no longer available


Not sure the lens distortion is an adequate transform, we would need something that "unrolls" the picture:

Attachment:
CurvedPrint.png
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Mr Ed
 Post subject: Re: curved image (how do I stretch)
PostPosted: Tue Jul 09, 2019 5:31 pm  (#5) 
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Posts: 38
It worked (some) but better with the distortion with curved lines. Thank you for the tips.
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