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How to cleanup an image before OCR ?

Posted: Thu May 23, 2013 4:40 pm
by jbergas
Hello,
I'm trying to do OCR with the image i've attached and the result is "25755" instead "421,22" (300dpi, converted to 1bpp, OCRTesseractSetPassCount=5, OCRTesseractSetOCRContext=0 Document , CharWhiteList="0123456789.,-" )

I know the problem is the "noise" at the upper area, how can i erase this "noise" ?

I've seen the demo "document clean up.exe", and i've tried to solve it with "Removelines","RemoveBlob","FxBitonalDespeckleMore" methods unsuccessful.

Regards!!

Re: How to cleanup an image before OCR ?

Posted: Wed Jan 30, 2019 6:11 pm
by Gabriela
Hello,

Please refer to this example:
https://www.gdpicture.com/guides/gdpicture/web ... %20up.html
You can find more examples under the Document Cleanup section in our Reference Guide: https://www.gdpicture.com/guides/gdpicture/web ... rview.html