Discussion:
[tesseract-ocr] Tesseract + CUDA code java wrapper
dhruv shah
2015-03-28 07:37:23 UTC
Permalink
Hello,

I'm using a java wrapper to access tesseract libraries.
Here is my code (default available on tess4j site):

import net.sourceforge.tess4j.*;

public class TesseractExample1 {

public static void main(String[] args) {
File imageFile = new File("eurotext.tiff");
Tesseract instance = null;
instance = Tesseract.getInstance(); // JNA Interface Mapping

try {
String result = instance.doOCR(imageFile);
System.out.println(result);
} catch (TesseractException e) {
//System.err.println(e.getMessage());
e.printStackTrace();
}
}
}

I'm using 32 bit *jdk 1.8.0_40*
I have a *64 bit linux 14.04*
I'm getting the following error.

Exception in thread "main" java.lang.UnsatisfiedLinkError: Error looking up
function 'TessBaseAPICreate': /usr/local/lib/libtesseract.so: undefined
symbol: TessBaseAPICreate
at com.sun.jna.Function.<init>(Function.java:208)
at com.sun.jna.NativeLibrary.getFunction(NativeLibrary.java:536)
at com.sun.jna.NativeLibrary.getFunction(NativeLibrary.java:513)
at com.sun.jna.NativeLibrary.getFunction(NativeLibrary.java:499)
at com.sun.jna.Library$Handler.invoke(Library.java:199)
at com.sun.proxy.$Proxy0.TessBaseAPICreate(Unknown Source)
at net.sourceforge.tess4j.Tesseract.init(Tesseract.java:344)
at net.sourceforge.tess4j.Tesseract.doOCR(Tesseract.java:256)
at net.sourceforge.tess4j.Tesseract.doOCR(Tesseract.java:188)
at net.sourceforge.tess4j.Tesseract.doOCR(Tesseract.java:172)
at com.meditab.central.TesseractExample1.main(TesseractExample1.java:22)




command used to make the Tesseract+CUDA
sudo ./configure --build=i386-linux-gnu LDFLAGS="-m32
-L/usr/local/cuda-6.5/lib -L/usr/lib/i386-linux-gnu" LIBS="-lcudart -lcuda"
CPPFLAGS="-m32 -I/usr/local/cuda-6.5/include" CXXFLAGS=-m32 CFLAGS=-m32

command used to make LEPTONICA
sudo ./configure CPPFLAGS=-m32 LDFLAGS="-m32 -L/usr/lib/i386-linux-gnu"
CXXFLAGS=-m32 CFLAGS=-m32


Can someone please give me an idea as to what might be going wrong?
I'll provide all the other necessary details.
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Quan Nguyen
2015-03-28 23:41:54 UTC
Permalink
What version of Tesseract did you build? Did you install it afterwards,
together with tessdata?
Post by dhruv shah
Hello,
I'm using a java wrapper to access tesseract libraries.
import net.sourceforge.tess4j.*;
public class TesseractExample1 {
public static void main(String[] args) {
File imageFile = new File("eurotext.tiff");
Tesseract instance = null;
instance = Tesseract.getInstance(); // JNA Interface Mapping
try {
String result = instance.doOCR(imageFile);
System.out.println(result);
} catch (TesseractException e) {
//System.err.println(e.getMessage());
e.printStackTrace();
}
}
}
I'm using 32 bit *jdk 1.8.0_40*
I have a *64 bit linux 14.04*
I'm getting the following error.
Exception in thread "main" java.lang.UnsatisfiedLinkError: Error looking
up function 'TessBaseAPICreate': /usr/local/lib/libtesseract.so: undefined
symbol: TessBaseAPICreate
at com.sun.jna.Function.<init>(Function.java:208)
at com.sun.jna.NativeLibrary.getFunction(NativeLibrary.java:536)
at com.sun.jna.NativeLibrary.getFunction(NativeLibrary.java:513)
at com.sun.jna.NativeLibrary.getFunction(NativeLibrary.java:499)
at com.sun.jna.Library$Handler.invoke(Library.java:199)
at com.sun.proxy.$Proxy0.TessBaseAPICreate(Unknown Source)
at net.sourceforge.tess4j.Tesseract.init(Tesseract.java:344)
at net.sourceforge.tess4j.Tesseract.doOCR(Tesseract.java:256)
at net.sourceforge.tess4j.Tesseract.doOCR(Tesseract.java:188)
at net.sourceforge.tess4j.Tesseract.doOCR(Tesseract.java:172)
at
com.meditab.central.TesseractExample1.main(TesseractExample1.java:22)
command used to make the Tesseract+CUDA
sudo ./configure --build=i386-linux-gnu LDFLAGS="-m32
-L/usr/local/cuda-6.5/lib -L/usr/lib/i386-linux-gnu" LIBS="-lcudart -lcuda"
CPPFLAGS="-m32 -I/usr/local/cuda-6.5/include" CXXFLAGS=-m32 CFLAGS=-m32
command used to make LEPTONICA
sudo ./configure CPPFLAGS=-m32 LDFLAGS="-m32 -L/usr/lib/i386-linux-gnu"
CXXFLAGS=-m32 CFLAGS=-m32
Can someone please give me an idea as to what might be going wrong?
I'll provide all the other necessary details.
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dhruv shah
2015-03-29 05:23:43 UTC
Permalink
The Tesseract version is 3.01 and yes I installed it afterwards. When I'm
trying to use the tesseract from command line like so,
tesseract eurotext.tiff out
then the out file has the correct output.
But when i try to consume the libraries, then the code fails.
I tried to use C++ code also even there it fails.
Post by Quan Nguyen
What version of Tesseract did you build? Did you install it afterwards,
together with tessdata?
Post by dhruv shah
Hello,
I'm using a java wrapper to access tesseract libraries.
import net.sourceforge.tess4j.*;
public class TesseractExample1 {
public static void main(String[] args) {
File imageFile = new File("eurotext.tiff");
Tesseract instance = null;
instance = Tesseract.getInstance(); // JNA Interface Mapping
try {
String result = instance.doOCR(imageFile);
System.out.println(result);
} catch (TesseractException e) {
//System.err.println(e.getMessage());
e.printStackTrace();
}
}
}
I'm using 32 bit *jdk 1.8.0_40*
I have a *64 bit linux 14.04*
I'm getting the following error.
Exception in thread "main" java.lang.UnsatisfiedLinkError: Error looking
up function 'TessBaseAPICreate': /usr/local/lib/libtesseract.so: undefined
symbol: TessBaseAPICreate
at com.sun.jna.Function.<init>(Function.java:208)
at com.sun.jna.NativeLibrary.getFunction(NativeLibrary.java:536)
at com.sun.jna.NativeLibrary.getFunction(NativeLibrary.java:513)
at com.sun.jna.NativeLibrary.getFunction(NativeLibrary.java:499)
at com.sun.jna.Library$Handler.invoke(Library.java:199)
at com.sun.proxy.$Proxy0.TessBaseAPICreate(Unknown Source)
at net.sourceforge.tess4j.Tesseract.init(Tesseract.java:344)
at net.sourceforge.tess4j.Tesseract.doOCR(Tesseract.java:256)
at net.sourceforge.tess4j.Tesseract.doOCR(Tesseract.java:188)
at net.sourceforge.tess4j.Tesseract.doOCR(Tesseract.java:172)
at
com.meditab.central.TesseractExample1.main(TesseractExample1.java:22)
command used to make the Tesseract+CUDA
sudo ./configure --build=i386-linux-gnu LDFLAGS="-m32
-L/usr/local/cuda-6.5/lib -L/usr/lib/i386-linux-gnu" LIBS="-lcudart -lcuda"
CPPFLAGS="-m32 -I/usr/local/cuda-6.5/include" CXXFLAGS=-m32 CFLAGS=-m32
command used to make LEPTONICA
sudo ./configure CPPFLAGS=-m32 LDFLAGS="-m32 -L/usr/lib/i386-linux-gnu"
CXXFLAGS=-m32 CFLAGS=-m32
Can someone please give me an idea as to what might be going wrong?
I'll provide all the other necessary details.
--
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Quan Nguyen
2015-03-29 13:59:46 UTC
Permalink
The C-API, which Tess4J wraps around, was re-introduced in 3.02. You would
need to upgrade to that.
Post by dhruv shah
The Tesseract version is 3.01 and yes I installed it afterwards. When I'm
trying to use the tesseract from command line like so,
tesseract eurotext.tiff out
then the out file has the correct output.
But when i try to consume the libraries, then the code fails.
I tried to use C++ code also even there it fails.
Post by Quan Nguyen
What version of Tesseract did you build? Did you install it afterwards,
together with tessdata?
Post by dhruv shah
Hello,
I'm using a java wrapper to access tesseract libraries.
import net.sourceforge.tess4j.*;
public class TesseractExample1 {
public static void main(String[] args) {
File imageFile = new File("eurotext.tiff");
Tesseract instance = null;
instance = Tesseract.getInstance(); // JNA Interface Mapping
try {
String result = instance.doOCR(imageFile);
System.out.println(result);
} catch (TesseractException e) {
//System.err.println(e.getMessage());
e.printStackTrace();
}
}
}
I'm using 32 bit *jdk 1.8.0_40*
I have a *64 bit linux 14.04*
I'm getting the following error.
Exception in thread "main" java.lang.UnsatisfiedLinkError: Error looking
up function 'TessBaseAPICreate': /usr/local/lib/libtesseract.so: undefined
symbol: TessBaseAPICreate
at com.sun.jna.Function.<init>(Function.java:208)
at com.sun.jna.NativeLibrary.getFunction(NativeLibrary.java:536)
at com.sun.jna.NativeLibrary.getFunction(NativeLibrary.java:513)
at com.sun.jna.NativeLibrary.getFunction(NativeLibrary.java:499)
at com.sun.jna.Library$Handler.invoke(Library.java:199)
at com.sun.proxy.$Proxy0.TessBaseAPICreate(Unknown Source)
at net.sourceforge.tess4j.Tesseract.init(Tesseract.java:344)
at net.sourceforge.tess4j.Tesseract.doOCR(Tesseract.java:256)
at net.sourceforge.tess4j.Tesseract.doOCR(Tesseract.java:188)
at net.sourceforge.tess4j.Tesseract.doOCR(Tesseract.java:172)
at
com.meditab.central.TesseractExample1.main(TesseractExample1.java:22)
command used to make the Tesseract+CUDA
sudo ./configure --build=i386-linux-gnu LDFLAGS="-m32
-L/usr/local/cuda-6.5/lib -L/usr/lib/i386-linux-gnu" LIBS="-lcudart -lcuda"
CPPFLAGS="-m32 -I/usr/local/cuda-6.5/include" CXXFLAGS=-m32 CFLAGS=-m32
command used to make LEPTONICA
sudo ./configure CPPFLAGS=-m32 LDFLAGS="-m32 -L/usr/lib/i386-linux-gnu"
CXXFLAGS=-m32 CFLAGS=-m32
Can someone please give me an idea as to what might be going wrong?
I'll provide all the other necessary details.
--
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For more options, visit https://groups.google.com/d/optout.
dhruv shah
2015-03-30 03:53:49 UTC
Permalink
I have the latest version of tess4j from maven repository.

Also the CPP code that I'm running is the default
Tesseractmain.cpp(attached)
Here is the command I'm using to build it.
sudo g++ -m32 tesseractmain.cpp -I../../Tesseract/Tesseract/ccutil
-I../../leptonica-1.71/src -I../../Tesseract/Tesseract/ccstruct
-I../../Tesseract/Tesseract/ccmain -I../../Tesseract/Tesseract/viewer
-I/usr/local/cuda-6.5/include -L/usr/local/cuda-6.5/lib -lcudart

Also, the following in the makefile that was generated when making the
tesseract application.
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dist-hook:
# Need to remove .svn directories from directories
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The C-API, which Tess4J wraps around, was re-introduced in 3.02. You would
need to upgrade to that.
Post by dhruv shah
The Tesseract version is 3.01 and yes I installed it afterwards. When I'm
trying to use the tesseract from command line like so,
tesseract eurotext.tiff out
then the out file has the correct output.
But when i try to consume the libraries, then the code fails.
I tried to use C++ code also even there it fails.
Post by Quan Nguyen
What version of Tesseract did you build? Did you install it afterwards,
together with tessdata?
Post by dhruv shah
Hello,
I'm using a java wrapper to access tesseract libraries.
import net.sourceforge.tess4j.*;
public class TesseractExample1 {
public static void main(String[] args) {
File imageFile = new File("eurotext.tiff");
Tesseract instance = null;
instance = Tesseract.getInstance(); // JNA Interface Mapping
try {
String result = instance.doOCR(imageFile);
System.out.println(result);
} catch (TesseractException e) {
//System.err.println(e.getMessage());
e.printStackTrace();
}
}
}
I'm using 32 bit *jdk 1.8.0_40*
I have a *64 bit linux 14.04*
I'm getting the following error.
Exception in thread "main" java.lang.UnsatisfiedLinkError: Error
undefined symbol: TessBaseAPICreate
at com.sun.jna.Function.<init>(Function.java:208)
at com.sun.jna.NativeLibrary.getFunction(NativeLibrary.java:536)
at com.sun.jna.NativeLibrary.getFunction(NativeLibrary.java:513)
at com.sun.jna.NativeLibrary.getFunction(NativeLibrary.java:499)
at com.sun.jna.Library$Handler.invoke(Library.java:199)
at com.sun.proxy.$Proxy0.TessBaseAPICreate(Unknown Source)
at net.sourceforge.tess4j.Tesseract.init(Tesseract.java:344)
at net.sourceforge.tess4j.Tesseract.doOCR(Tesseract.java:256)
at net.sourceforge.tess4j.Tesseract.doOCR(Tesseract.java:188)
at net.sourceforge.tess4j.Tesseract.doOCR(Tesseract.java:172)
at
com.meditab.central.TesseractExample1.main(TesseractExample1.java:22)
command used to make the Tesseract+CUDA
sudo ./configure --build=i386-linux-gnu LDFLAGS="-m32
-L/usr/local/cuda-6.5/lib -L/usr/lib/i386-linux-gnu" LIBS="-lcudart -lcuda"
CPPFLAGS="-m32 -I/usr/local/cuda-6.5/include" CXXFLAGS=-m32 CFLAGS=-m32
command used to make LEPTONICA
sudo ./configure CPPFLAGS=-m32 LDFLAGS="-m32
-L/usr/lib/i386-linux-gnu" CXXFLAGS=-m32 CFLAGS=-m32
Can someone please give me an idea as to what might be going wrong?
I'll provide all the other necessary details.
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dhruv shah
2015-03-30 03:57:31 UTC
Permalink
Hey,

Sorry, I forgot to attach the output when trying to build of the
tesseractmain.cpp file.
/tmp/cctuZREz.o: In function `main':
tesseractmain.cpp:(.text+0x6c): undefined reference to
`tesseract::TessBaseAPI::Version()'
tesseractmain.cpp:(.text+0x2d8): undefined reference to
`tesseract::TessBaseAPI::TessBaseAPI()'
tesseractmain.cpp:(.text+0x2ec): undefined reference to
`tesseract::TessBaseAPI::SetOutputName(char const*)'
tesseractmain.cpp:(.text+0x34e): undefined reference to
`tesseract::TessBaseAPI::Init(char const*, char const*,
tesseract::OcrEngineMode, char**, int, GenericVector<STRING> const*,
GenericVector<STRING> const*, bool)'
tesseractmain.cpp:(.text+0x35a): undefined reference to
`tesseract::TessBaseAPI::GetPageSegMode() const'
tesseractmain.cpp:(.text+0x378): undefined reference to
`tesseract::TessBaseAPI::SetPageSegMode(tesseract::PageSegMode)'
tesseractmain.cpp:(.text+0x42f): undefined reference to
`tesseract::TessBaseAPI::Version()'
tesseractmain.cpp:(.text+0x470): undefined reference to `tprintf(char
const*, ...)'
tesseractmain.cpp:(.text+0x4c7): undefined reference to `pixRead'
tesseractmain.cpp:(.text+0x4fc): undefined reference to `pixDestroy'
tesseractmain.cpp:(.text+0x508): undefined reference to `STRING::STRING()'
tesseractmain.cpp:(.text+0x534): undefined reference to
`tesseract::TessBaseAPI::ProcessPages(char const*, char const*, int,
STRING*)'
tesseractmain.cpp:(.text+0x547): undefined reference to `tprintf(char
const*, ...)'
tesseractmain.cpp:(.text+0x568): undefined reference to
`tesseract::TessBaseAPI::GetBoolVariable(char const*, bool*) const'
tesseractmain.cpp:(.text+0x589): undefined reference to
`tesseract::TessBaseAPI::GetBoolVariable(char const*, bool*) const'
tesseractmain.cpp:(.text+0x59d): undefined reference to
`STRING::STRING(char const*)'
tesseractmain.cpp:(.text+0x5d2): undefined reference to
`STRING::operator+=(char const*)'
tesseractmain.cpp:(.text+0x5de): undefined reference to `STRING::string()
const'
tesseractmain.cpp:(.text+0x605): undefined reference to `STRING::string()
const'
tesseractmain.cpp:(.text+0x615): undefined reference to `tprintf(char
const*, ...)'
tesseractmain.cpp:(.text+0x62d): undefined reference to `STRING::length()
const'
tesseractmain.cpp:(.text+0x63b): undefined reference to `STRING::string()
const'
tesseractmain.cpp:(.text+0x679): undefined reference to `STRING::~STRING()'
tesseractmain.cpp:(.text+0x685): undefined reference to `STRING::~STRING()'
tesseractmain.cpp:(.text+0x691): undefined reference to
`tesseract::TessBaseAPI::~TessBaseAPI()'
tesseractmain.cpp:(.text+0x6b3): undefined reference to `STRING::~STRING()'
tesseractmain.cpp:(.text+0x6c3): undefined reference to `STRING::~STRING()'
tesseractmain.cpp:(.text+0x6d3): undefined reference to
`tesseract::TessBaseAPI::~TessBaseAPI()'
Post by dhruv shah
I have the latest version of tess4j from maven repository.
Also the CPP code that I'm running is the default
Tesseractmain.cpp(attached)
Here is the command I'm using to build it.
sudo g++ -m32 tesseractmain.cpp -I../../Tesseract/Tesseract/ccutil
-I../../leptonica-1.71/src -I../../Tesseract/Tesseract/ccstruct
-I../../Tesseract/Tesseract/ccmain -I../../Tesseract/Tesseract/viewer
-I/usr/local/cuda-6.5/include -L/usr/local/cuda-6.5/lib -lcudart
Also, the following in the makefile that was generated when making the
tesseract application.
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dhruv shah
2015-03-30 04:39:12 UTC
Permalink
Here is another code sample In CPP. This is super duper basic.

#include <tesseract/baseapi.h>
#include <leptonica/allheaders.h>

int main()
{
char *outText;

tesseract::TessBaseAPI *api = new tesseract::TessBaseAPI();
return 0;
}

This gives the following error.
..................
error adding symbols: File in wrong format
collect2: error: ld returned 1 exit status
Post by dhruv shah
Hey,
Sorry, I forgot to attach the output when trying to build of the
tesseractmain.cpp file.
tesseractmain.cpp:(.text+0x6c): undefined reference to
`tesseract::TessBaseAPI::Version()'
tesseractmain.cpp:(.text+0x2d8): undefined reference to
`tesseract::TessBaseAPI::TessBaseAPI()'
tesseractmain.cpp:(.text+0x2ec): undefined reference to
`tesseract::TessBaseAPI::SetOutputName(char const*)'
tesseractmain.cpp:(.text+0x34e): undefined reference to
`tesseract::TessBaseAPI::Init(char const*, char const*,
tesseract::OcrEngineMode, char**, int, GenericVector<STRING> const*,
GenericVector<STRING> const*, bool)'
tesseractmain.cpp:(.text+0x35a): undefined reference to
`tesseract::TessBaseAPI::GetPageSegMode() const'
tesseractmain.cpp:(.text+0x378): undefined reference to
`tesseract::TessBaseAPI::SetPageSegMode(tesseract::PageSegMode)'
tesseractmain.cpp:(.text+0x42f): undefined reference to
`tesseract::TessBaseAPI::Version()'
tesseractmain.cpp:(.text+0x470): undefined reference to `tprintf(char
const*, ...)'
tesseractmain.cpp:(.text+0x4c7): undefined reference to `pixRead'
tesseractmain.cpp:(.text+0x4fc): undefined reference to `pixDestroy'
tesseractmain.cpp:(.text+0x508): undefined reference to `STRING::STRING()'
tesseractmain.cpp:(.text+0x534): undefined reference to
`tesseract::TessBaseAPI::ProcessPages(char const*, char const*, int,
STRING*)'
tesseractmain.cpp:(.text+0x547): undefined reference to `tprintf(char
const*, ...)'
tesseractmain.cpp:(.text+0x568): undefined reference to
`tesseract::TessBaseAPI::GetBoolVariable(char const*, bool*) const'
tesseractmain.cpp:(.text+0x589): undefined reference to
`tesseract::TessBaseAPI::GetBoolVariable(char const*, bool*) const'
tesseractmain.cpp:(.text+0x59d): undefined reference to
`STRING::STRING(char const*)'
tesseractmain.cpp:(.text+0x5d2): undefined reference to
`STRING::operator+=(char const*)'
tesseractmain.cpp:(.text+0x5de): undefined reference to `STRING::string()
const'
tesseractmain.cpp:(.text+0x605): undefined reference to `STRING::string()
const'
tesseractmain.cpp:(.text+0x615): undefined reference to `tprintf(char
const*, ...)'
tesseractmain.cpp:(.text+0x62d): undefined reference to `STRING::length()
const'
tesseractmain.cpp:(.text+0x63b): undefined reference to `STRING::string()
const'
tesseractmain.cpp:(.text+0x679): undefined reference to `STRING::~STRING()'
tesseractmain.cpp:(.text+0x685): undefined reference to `STRING::~STRING()'
tesseractmain.cpp:(.text+0x691): undefined reference to
`tesseract::TessBaseAPI::~TessBaseAPI()'
tesseractmain.cpp:(.text+0x6b3): undefined reference to `STRING::~STRING()'
tesseractmain.cpp:(.text+0x6c3): undefined reference to `STRING::~STRING()'
tesseractmain.cpp:(.text+0x6d3): undefined reference to
`tesseract::TessBaseAPI::~TessBaseAPI()'
I have the latest version of tess4j from maven repository.
Also the CPP code that I'm running is the default
Tesseractmain.cpp(attached)
Here is the command I'm using to build it.
sudo g++ -m32 tesseractmain.cpp -I../../Tesseract/Tesseract/ccutil
-I../../leptonica-1.71/src -I../../Tesseract/Tesseract/ccstruct
-I../../Tesseract/Tesseract/ccmain -I../../Tesseract/Tesseract/viewer
-I/usr/local/cuda-6.5/include -L/usr/local/cuda-6.5/lib -lcudart
Also, the following in the makefile that was generated when making the
tesseract application.
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dhruv shah
2015-03-30 04:40:20 UTC
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Here is another code sample In CPP. This is super duper basic.

#include <tesseract/baseapi.h>
#include <leptonica/allheaders.h>

int main()
{
char *outText;

tesseract::TessBaseAPI *api = new tesseract::TessBaseAPI();
return 0;
}

This gives the following error.
..................
error adding symbols: File in wrong format
collect2: error: ld returned 1 exit status
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dhruv shah
2015-04-01 06:56:57 UTC
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Hey,

I've found the issue.
The library file that is required is libtesseract_api.so instead of
libtesseract.so. Can you tell me why this is so?
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