I really doubt that you will notice the curvature much in normal pictures and all images are skewed to some extent as the slide is nearly always slightly rotated in the scanner.The latter can as Peter has shown be corrected by free transform -skew. It is possible your scanner software has a skew correction and they might have a lens profile correction you can apply. Pretty well all negatives and slides 'bulge' in some way or other. You could try using newton glass to flatten the slides, but that opens up a new problems, trapped dust.
Photoshop has a lens correction facility, that might help you create a correction profile
I really doubt that you will notice the curvature much in normal pictures and all images are skewed to some extent as the slide is nearly always slightly rotated in the scanner.The latter can as Peter has shown be corrected by free transform -skew. It is possible your scanner software has a skew correction and they might have a lens profile correction you can apply. Pretty well all negatives and slides 'bulge' in some way or other. You could try using newton glass to flatten the slides, but that opens up a new problems, trapped dust.
Jul 26, 2019 at 10:57 AM
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