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Pdf: 2 columns for page --> 1 columns for page.
Posted: 2007-06-10T13:19:17-07:00
by poincare999
Hi, I am a Linux user (suse10.1).
I have a book scanned in the pdf format.
There are 2 columns for page.
I want split every page in 2 parts.
The new pdf file must have 1 column for page.
How can I do it?
Tanks.
Re: Pdf: 2 columns for page --> 1 columns for page.
Posted: 2007-06-11T18:57:24-07:00
by anthony
-crop 50%x0
Re: Pdf: 2 columns for page --> 1 columns for page.
Posted: 2007-06-12T16:04:51-07:00
by poincare999
It works, tank you very much.
But now I am another problem, the quality of the final file is poor.
How can I don't lose quality.
Re: Pdf: 2 columns for page --> 1 columns for page.
Posted: 2007-06-12T17:41:11-07:00
by anthony
See IM Examples, A word about Vector Image formats
http://www.imagemagick.org/Usage/formats/#vector
Basically you are printing or viewing the resuling scaned image at too low a reolution or pixel density. scans can be improved by using the highest resolution, then resampling the result to the desired resolution.
You can also use an initial
-median filter before the resize to remove individual pixel defects resulting from the scanned page.
For finding boundaries see... Blurred Trim
http://www.imagemagick.org/Usage/crop/#trim_blur