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Possible Duplicate:
Which free software can I use to deskew scanned images
I have several PDFs made up of book pages' scans. The scans are made from two pages at a time and some of these scans are skewed, making text appear slightly tilted.
I'm looking for a tool that could allow me to do an automatic optimization by deskewing the scans without losing readability. I've found the GPL software Briss to crop the scans in order to have a 1:1 page ratio instead of 2:1, but I don't have any tool to deskew the pages.
I stumbled upon unpaper, another open source tool that seems perfect for what I want to do, but that tool is Linux only and it doesn't work on PDF files directly.
Any hint is appreciated.
1@random: Why has this question been closed?? Why should this topic solicit 'debate, arguments, polling or extended discussion'?!? – Kurt Pfeifle – 2012-07-08T00:40:47.397
1"looking for a tool" is pretty much polling for services leads to the not constructive close reason @kur – random – 2012-07-08T00:43:08.343
1@random: This question led me to do some research about the topic, and I found some interesting options to persue. The most interesting one is using ImageMagick for this, and it seems surprisingly simple. Unfortunately your closing of this does not allow me to post my answer. – Kurt Pfeifle – 2012-07-08T00:58:25.800
@random: I'v now edited the question a bit. Hopefully it is now more compliant to your sense of 'constructiveness'. – Kurt Pfeifle – 2012-07-08T01:50:41.193
@random: Ok, 'closing as duplicate' is better acceptable to me in this case. – Kurt Pfeifle – 2012-07-08T10:00:15.087
@random: I don't agree that this is a duplicate. I was looking for something that operates directly on PDF files. If I need to do a conversion PDF -> Image and Image -> PDF, I have two more steps in which I have a quality loss. – Pietro M. – 2012-07-09T11:52:36.177