Not reading provided ./tessdata/eng.traineddata

[brnrc]

Just cloned the repo, built the .jar with

mvn assembly:single

Added the tess4j-2.0.0-SNAPSHOT-all.jar file to my classpath and tried to use it.
On the first call to

instance.doOCR(file);

it spits this out:

Error opening data file ./tessdata/eng.traineddata
Please make sure the TESSDATA_PREFIX environment variable is set to the parent directory of your "tessdata" directory.
Failed loading language 'eng'
Tesseract couldn't load any languages!
AdaptedTemplates != NULL:Error:Assert failed:in file ..\..\classify\adaptmatch.cpp, line 174

Double checked and yes, I do have the TESSDATA_PREFIX set to:C:\Users\ribeirob\Applications\nguyenq\tess4j\src\main\resources\

[4F2E4A2E]

Hi there!

Please post here the main method or class you where are calling the doOCR() method, thx.

[brnrc]

Sure!

        // Tess4J
        Tesseract instance = Tesseract.getInstance();
        instance.setPageSegMode(4);
        try {
            String content = instance.doOCR(page);
        } catch (TesseractException e) {
            e.printStackTrace();
        }

[4F2E4A2E]

The correct use of the TESS4J-API with the default tessdata folder:

File imageFile = new File("C:\\random.png");
Tesseract instance = Tesseract.getInstance();

//In case you don't have your own tessdata, let it also be extracted for you
File tessDataFolder = LoadLibs.extractTessResources("tessdata");

//Set the tessdata path
instance.setDatapath(tessDataFolder.getAbsolutePath());

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

Please use the latest release: 1.4.1

[brnrc]

Thank you, this worked!
Is there any documentation on this?

By the way, this led me to another bug #10

[4F2E4A2E]

We are working hard on the project right now, refactoring and testing are taking time, but soon we will deliver better documentation.
Thanks for creating the issue, please help us grow and let us know who is using tess4j: https://github.com/nguyenq/tess4j/wiki/Who-is-using-Tess4J

[ramesh-indutech]

Thank you, this worked! [4F2E4A2E]

[erochOnGit]

@4F2E4A2E Thank you, i'ts working now. I hope we could find more easily the doc in the futur ;) (maybe put the Tutorial directly in the readme file for a direct visioning in github ?)

[housme]

Is there a distinction between vertical reading and horizontal reading in picture reading?