Hi Richard, 

I know it was a while ago but did you ever find a solution to this problem? 

I'm attempting something similar where I wish only to recognize digits and 
discard any text matches.
The method presented in the FAQ isn't exactly what I need as it seems to 
only limit the returned results to digits, yet still matches all letters in 
the image.

Thanks, 
Jalal.

On Friday, March 4, 2011 12:36:56 AM UTC+11, Richard wrote:
>
> Yes, that is possible and I am scanning now to do that 
>
> .... but its not possible to always the know the format of the plate 
> and just changing random chars may/does give strange results. 
>
> On Mar 3, 1:13 pm, patrickq <[email protected]> wrote: 
> > The answer lies within your own question! Since you expect only 
> > digits, simply accept these letters as the equivalent digit by 
> > replacing them. 
> > 
> > Patrick 
> > 
> > On Mar 3, 5:09 am, Richard <[email protected]> wrote: 
> > 
> > > Hi, 
> > 
> > > I am really new to Tesseract OCR 3.0 as a static DLL within a windows 
> > > envionment and have the majority of what I want working but... 
> > 
> > > Is there a way to increase the sensitivity of the OCR engine? 
> > 
> > > For instance, I am passing JPG images that purely have images of 
> > > registration plates (ANPR essentially) but the OCR engine reads 
> > 
> > > 1 as I 
> > > 0 as U 
> > > 8 as S 
> > 
> > > I have tried altering params on the TessBaseAPI::INit but this simply 
> > > crashes it set to nything other than  OME_DEFAULT 
> > 
> > > I have also set up a char whilelist to limit to certain chars/digits 
> > 
> > > Any help would be appreciated.

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