Re: doc-view: Document quality and find-file

[Peter Dyballa <Peter_Dyballa@Web.DE>]

Am 17.09.2007 um 20:59 schrieb Amy Templeton:

>  article will be scanned

So your PDFs are not generated by some text system, but scanned pages  
from books or magazines! This of course explains that the characters  
will look ragged: printing is not perfect and scanning is even  
farther away from perfection. I presume the corners of the characters  
might look better when you use a resolution that is one half, one  
quarter, or one eighth etc. of the original scan's resolution. This  
way small distortions will get averaged. And this effect allows to  
reduce the amount of anti-aliasing Ghostscript uses to create the PNG  
picture. And depending on the actual bit depth of the scan you might  
adjust the PNG device for which gs converts the PDF file. It's  
useless to expand an 8-bit image to 24 bits.

You know that you can't search a text in such a scan? OTOH, an OCR  
software could improve the scans ...

--
Greetings

   Pete

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