Tessj4 - Error opening data file ./tessdata/eng.traineddata

Question

I have this problem in my web application in Tomcat 9:

Error opening data file ./tessdata/eng.traineddata Please make sure the TESSDATAPREFIX environment variable is set to the parent directory of your "tessdata" directory. Failed loading language 'eng' Tesseract couldn't load any languages!

I create folder C:\Tess4J from Tess4J 3.0.4 zip, with subfolders:

• dist
  • tess4j-3.0.jar
• lib
  • LIBS
• nbproject
• src
• tessdata
  • Downloaded ZIP with languages and extracted here
• test

In catalina.properties i add:

• C:/Tess4J/dist/tess4j-3.0.jar,C:/Tess4J/lib

In environments i try to add both, and doesn't work:

• TESSDATA_PREFIX --> C:/Tess4J
• TESSDATA_PREFIX --> C:/Tess4J/tessdata

Then i invoke my servlet whit doOCR method, and i've got error.

May you help me please?

Answer 1

You have to choose the up directory, in your case C:\Tess4J, try it:

tessInst= new Tesseract();
tessInst.setDatapath("C:\\Tess4J"); 
tessInst.setLanguage("eng");

Sorry about my english