Arch Linux

BelowZero

Member

Registered: 2018-03-13

Posts: 59

Deskew scanned PDF images

I have a scanner connected to my machine which works well, but the resulting PDF files are often slightly tilted.  Is there a program out there that can deskew the PDF pages?  I know Adobe Acrobat does this, but I'm not running that on my Arch machine.

progandy

Member

Registered: 2012-05-17

Posts: 5,193

Re: Deskew scanned PDF images

How are you creating the PDF?
As far as I know, ocrmypdf, gscan2pdf and sane-scan-pdf should support deskew. There is also the gimp plugin deskew.

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BelowZero

Member

Registered: 2018-03-13

Posts: 59

Re: Deskew scanned PDF images

I'm using gscan2pdf, and it often fails to deskew.  That's why I'm looking for an alternative solution.

progandy

Member

Registered: 2012-05-17

Posts: 5,193

Re: Deskew scanned PDF images

You could scan as images or extract the images from the PDF, then deskew them with e.g. unpaper (I think gscan2pdf uses that as well), gimp+deskew plugin or deskew and then recreate a pdf afterwards.

Edit: If the deskew binary works better, maybe you can set a user defined command to run it on scanned images in gscan2pdf.

Last edited by progandy (2018-05-25 18:08:54)

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sonoran

Member

From: sonoran desert

Registered: 2009-01-12

Posts: 192

Re: Deskew scanned PDF images

Masterpdfeditor in the AUR has a transformation matrix function that can skew - I have not tried it on a scanned image.