Error: Illegal Parameter specification! with Tesseract4Alpha

[nachobit]

After upgrade to Tesseract-4-Alpha, I found this error making the OCR from my JAVA code:

ITesseract instance = new Tesseract(); instance.setDatapath("/usr/share/tessdata/"); instance.setLanguage("spa"); (...) result = instance.doOCR(imageFile);

---

Environment

• Tesseract Version: tesseract 4.00.00alpha
• Leptonica Version: leptonica-1.74.4
• Platform: CentOS 6.7
• Server: Wildfly 10.1

Current Behavior:

Error: Illegal Parameter specification!
"Fatal error encountered!" == NULL:Error:Assert failed:in file globaloc.cpp, line 75

A fatal error has been detected by the Java Runtime Environment:

SIGSEGV (0xb) at pc=0x00007ff1b3098549, pid=25091, tid=0x00007ff29d7d7700

JRE version: OpenJDK Runtime Environment (8.0_121-b13) (build 1.8.0_121-b13)
Java VM: OpenJDK 64-Bit Server VM (25.121-b13 mixed mode linux-amd64 compressed oops)
Problematic frame:
C [libtesseract.so+0x26f549] ERRCODE::error(char const*, TessErrorLogCode, char const*, ...) const+0x129

Failed to write core dump. Core dumps have been disabled. To enable core dumping, try "ulimit -c unlimited" before starting Java again

An error report file with more information is saved as:
/opt/wildfly/wildfly-10.1.0.Final/hs_err_pid25091.log

If you would like to submit a bug report, please visit:
http://bugreport.java.com/bugreport/crash.jsp
The crash happened outside the Java Virtual Machine in native code.
See problematic frame for where to report the bug.

*** JBossAS process (25091) received ABRT signal ***

Suggested Fix:

Any idea?

[Shreeshrii]

Please use the latest source from master branch of github and inform whether you still get the error.

[nachobit]

I'm using the lastest source yet. I have the same Error (*) in two different OS.

(*) Error: Illegal Parameter specification!
"Fatal error encountered!" == NULL:Error:Assert failed:in file globaloc.cpp, line 75

[Shreeshrii]

what version of c++ are you using?

two different OS

which ones? I have been able to build on ubuntu 14.04. Travis and appveyor builds are building ok.

[Shreeshrii]

Also, are you able to run tesseract from command line ?

tesseract -v

also try to OCR the sample image from testing folder.

[nachobit]

@Shreeshrii I'm using g++ 7.1.1 in Arch and 4.8.2 in CentOS 6.7.
I launch tesseract from Java. No problems with 3.05 version but I get the error previously commented with 4Alpha version.

tesseract 4.00.00alpha
leptonica-1.74.4
libgif 5.1.4 : libjpeg 8d (libjpeg-turbo 1.5.1) : libpng 1.6.29 : libtiff 4.0.8 : zlib 1.2.11 : libwebp 0.6.0

[Shreeshrii]

what about

tesseract --list_langs

Are you able to OCR an image from command line with the 4.0 version?

Do you have 4.00.00alpha version of traineddata files?

Download 4.0 traineddata to a different folder and refer to that

[nachobit]

No problems detecting langs with tesseract --list_langs (eng, spa and osd trainned files for LSTM based 4.00.00alpha version).

About command line recognition, I have done fine an example from testing folder properly.

Perhaps, some Java code has changed from this 4Alpha version?

[Shreeshrii]

@nachobit Please see Quan's Java JNA wrapper for Tesseract OCR API at https://github.com/nguyenq/tess4j

[nachobit]

The problem with 3.05.01 version is that I get different resutls from both OS using same Leptonica and Tesseract ver. in a PDF recognition.

Example:

0000 0340 º71º ZL (in CentOS) and 0000 0340 0710 ZL (in Arch).

For that reason I'd like to improve the 4Alpha but it's impossible for the error commented some lines back.

[amitdo]

If you have an issue with a wrapper to Tesseract's C/C++ API, please report the issue to the developers of that software.

[amitdo]

I'm using g++ 7.1.1 in Arch and 4.8.2 in CentOS 6.7.

0000 0340 º71º ZL (in CentOS) and 0000 0340 0710 ZL (in Arch).

Ray said, many years ago, that you can get different results with different compilers.

[amitdo]

Perhaps, some Java code has changed from this 4Alpha version?

Yes.
https://github.com/nguyenq/tess4j/commits/master

[nachobit]

Updated to the lastest libs from Tess4J-3.4.0-src I get same error when launch the OCR from Java code.

From 3.05.01 version, is there any solution to solve the fail recognizing "zeros" ( º instead of 0)?

[amitdo]

3.4.0 does not include the 4.00 changes.
https://github.com/nguyenq/tess4j/commits/tess4j-3.4.0

[amitdo]

From 3.05.01 version, is there any solution to solve the fail recognizing "zeros" ( º instead of 0)?

You can try to compile with a newer version of gcc. I can't promise that this 'solution' will help you with this issue.