Re: [tesseract-ocr] Newbie: wondering why a fairly crisp document has such low accuracy

[ShreeDevi Kumar]

With English you should probably get close to 99% accuracy.

Is your png at 300 dpi?

Which version of tesseract did you use?
Which traineddata?

ShreeDevi

भजन - कीर्तन - आरती @ http://bhajans.ramparivar.com

On Sat, Aug 12, 2017 at 11:46 PM, Stephen Boesch  wrote:

> I printed out the "Welcome" page on my HP laserjet printer and scanned it
> in using .png .  The quality is quite good. So I had been  anticipating
> maybe 85%+ accuracy on the tesseract-OCR. I did not even bother to tally
> carefullly - but by eyeballing it seems about  50%.I had used all
> default settings.
>
> Some of the consistent errors:
>
> W -> H
> in -> m
> li -> h
> b -> t)
> ll -> H
>
> So is this just "the way things are" in OCR land?  Or am I missing some
> fundamental settings here - to get some reasonable usefulness?
>
> thanks
>
> stephenb
>
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[tesseract-ocr] Newbie: wondering why a fairly crisp document has such low accuracy

[Stephen Boesch]

I printed out the "Welcome" page on my HP laserjet printer and scanned it 
in using .png .  The quality is quite good. So I had been  anticipating 
maybe 85%+ accuracy on the tesseract-OCR. I did not even bother to tally 
carefullly - but by eyeballing it seems about  50%.I had used all 
default settings.

Some of the consistent errors:

W -> H
in -> m
li -> h
b -> t)
ll -> H

So is this just "the way things are" in OCR land?  Or am I missing some 
fundamental settings here - to get some reasonable usefulness?

thanks

stephenb

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