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Re: [Bug-ocrad] 0.18-pre2


From: Uwe Dippel
Subject: Re: [Bug-ocrad] 0.18-pre2
Date: Fri, 28 Mar 2008 10:39:16 +0800
User-agent: Thunderbird 2.0.0.6 (X11/20080102)

Antonio Diaz Diaz wrote:

I have tried the option --scale=2 and it recognizes all the t's correctly. Think that 't' is a difficult letter, and the faxes you feed to ocrad are not the easiest images to recognize.

I know, I know. :)

I never thought scaling would be of an advantage? Does it do some interpolation? (I read the info pages, but didn't find much.)

It would be good to have a short write-up on what to do to increase the accuracy. I have tried some other options, but rather on the 'blind' side of 'just playing'. Different character sets have not resulted in any improvement, e.g.
Any good reason, why you tried scaling at a factor of 2?

And still another one: is there a chance to scale with different factors for x and y? I am asking, since we are doing OCR on faxes, and 'normal' at faxes means 204x98 dpi.

Thanks again,

Uwe




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