FreeOCR

joy

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Jun 25, 2008, 3:53:35 AM6/25/08

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Hi everybody!

Does anyone know the program FreeOCR?

FreeOCR is a OCR program, that including the Windows compiled
Tesseract free ocr engine.

I've used this program for two days, and I realized that with the best
results are obtained using that Tesseract separately.

So, anyone know what is the difference between FreeOCR and Tesseract?

I suspect that the difference is thatFreeOCR applies image processing.

Many Thanks!

rthomas

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Jun 25, 2008, 4:31:31 AM6/25/08

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Hi,

Yes, FreeOCR uses tessdll.dll
Tessdll doesn't convert the image in two bit using the threshold
algorithm present in tesseract and used by tesseract.exe.

Remi

joy

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Jun 25, 2008, 6:44:40 AM6/25/08

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Sorry, but I don't understand very well.

Does Tesseract doesn't use tessdll.dll? Do you know why?
What file used then Tesseract?

What is the algorithm that uses FreeOCR (The used by tessdll.dll)?

Do you know how could implement these obvious improvements in
Tesseract?

Many, many thanks, and deeply sorry for any inconvenience. I wait for
your response!

JOY

rthomas

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Jun 25, 2008, 7:49:21 AM6/25/08

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> Does Tesseract doesn't use tessdll.dll?

No

> Do you know why?
Because it's a "stand alone" exe

> What file used then Tesseract?

None, tesseract.exe contains the entire OCR engine

>
> What is the algorithm that uses FreeOCR (The used by tessdll.dll)?

Tessdll uses directly the OCR without modifying the image.
Tesseract use the same OCR but before threshold the image.

> Do you know how could implement these obvious improvements in
> Tesseract?

You mean how implement these improvements in tessdll ? Because
Tesseract.exe does a better job !

One solution is for the author of FreeOCR to replace tessdll with
tessnet2. Tessnet2 use the thresholding algorithm.

Remi

joy

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Jun 25, 2008, 8:22:38 AM6/25/08

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So, I have a little bit problem. Because, at this moment, I have
better results with FreeOCR. Why? I don't know yet.
I expected the opposite result.

Please, check this file.
*Attach file:
http://groups.google.com/group/tesseract-ocr/web/results.rar

Many thanks.

rthomas

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Jun 25, 2008, 10:03:39 AM6/25/08

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Hi,

After reinstalling FreeOCR I found it doesn't use Tessdll but
tesseract.exe
I was not getting the same results with FreeOCR and tesseract.exe,
like you.
After searching why I found FreeOCR save the bitmap double size before
invoking tesseract.exe.
Take the image file you attached, double the size, use tesseract.exe
and you get the same results as FreeOCR !!

Interesting and easy to improve OCR recognition.

Remi

> > Remi- Hide quoted text -
>
> - Show quoted text -

74yrs old

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Jun 25, 2008, 11:51:01 AM6/25/08

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GUI works based on tesseract.exe and tessdata. You can add any lang datafiles generated by you in the folder of freeocr. Even you can replace tesseract.exe with latest version you generated in normal way.
Only difference is Instead of running from commandline, gui run whenever you click and also has feature of scanning etc. It is build in borland C++; This is excellent user interface .

joy

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Jun 26, 2008, 3:48:53 AM6/26/08

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Hi Remi!

Yep, I'm surprised too that only changing the image size is much
better the OCR.

Many, many thanks Remi!

Best regards!

JOY