Does x64 bit DLL & LIB files are available for C++ Leptonica & Tesseract-OCR library?

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I am converting c++ 32 bit project exe to x64 bit exe. In my project I used OpenCV, Leptonica and Tesseract-OCR c++ libraries. But for Leptonica and Tesseract, I do not get x64 bit DLL & LIB files, even on internet also. Due to this Linking error occured while project build.

So, how do I get c++ x64 bit DLL & LIB files of Leptonica & Tesseract-OCR?

I took full source code of Leptonica library. Then build it in visual studio with x64 bit environment. It build successfully and its x64 bit DLL & LIB files are working.
Then I took full source code of Tesseract-OCR library and build it in VS2008 for x64 bit, but it gives lots of linking error[LNK2001 : unresolved external symbol].
Same Tesseract source code in VS2008 for 32 bit is working fine.
Please help.

Posted 24-Jun-14 20:40pm

RupeshMote

Updated 26-Jun-14 18:51pm

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Sergey Alexandrovich Kryukov 25-Jun-14 2:42am

You can compile them by using a compiler. :-)
—SA

RupeshMote 25-Jun-14 3:03am

Thanks

Sergey Alexandrovich Kryukov 25-Jun-14 3:09am

You are very welcome. :-)
—SA

RupeshMote 27-Jun-14 0:13am

I took full source code of Leptonica library. Then build it in visual studio with x64 bit environment. It build successfully and its x64 bit DLL & LIB files are working.
Then I took full source code of Tesseract-OCR library and build it in VS2008 for x64 bit, but it gives lots of linking error[LNK2001 : unresolved external symbol].
Same Tesseract source code in VS2008 for 32 bit is working fine.
Please help.

Sergey Alexandrovich Kryukov 27-Jun-14 1:10am

Well... Tesseract is pretty ugly, as far as I can remember. Good open-source OCR is hard to find; and all I ever saw is pretty much obsolete. There are some more modern articles on CodeProject, some are very good (usually based on neural networks), they allow for recognition of handwritten text, but they all need further work to make them into complete OCR, which is quite doable, it just needs time...
—SA

RupeshMote 27-Jun-14 6:31am

Ok,Thanks

RupeshMote 28-Jun-14 6:46am

TO build Tesseract-OCR library in VS2008 for x64 bit, I used latest version of Leptonica DLL & LIB files[i.e. Leptonica1.70 version]. Now Tesseract source code is build successfully for x64 bit. And these dll & lib files are working fine.

ntdoan.bksprecision 6-Nov-14 2:22am

Dear RupeshMote, can you send me the dll & lib file for VS2008 64bit?

SivaKtamilan 28-Apr-15 8:31am

Hi,
can you please provide the steps to build the x64 in vs2010? and where to get the source files?

RupeshMote 5-May-15 6:33am

For Leptonica library refer this link : http://www.leptonica.org/
Download leptonica source code and also README.html file. README.html file explains how to build leptonica in visual studio.

For Tesseract refer this link : http://tesseract-ocr.googlecode.com/git/vs2008/doc/setup.html

It explains how to build Tesseract with visual studio.

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Sergey Alexandrovich Kryukov · Accepted Answer · 2014-06-24T20:44:00

Both libraries are open-source. When the authors of open-source product publish their code, they don't have to provide the build of it for all possible platforms and CPU architectures. And you should not try to find them. I always advise to use open-source products in the form of source code. How? I answered in my comment to the question.

—SA