Tess4J NoClassDefFoundError

Question

I'm trying to use Tess4J with the following:

public static String parseImageCharacters(BufferedImage image) throws Exception {
    Tesseract instance = Tesseract.getInstance();

    return instance.doOCR(image);
}

but I'm getting the exeption:

java.lang.NoClassDefFoundError: com/sun/media/imageio/plugins/tiff/TIFFImageWriteParam
at net.sourceforge.tess4j.Tesseract.doOCR(Tesseract.java:237)
at net.sourceforge.tess4j.Tesseract.doOCR(Tesseract.java:221)
...

Which refers to the following line in the Tesseract class:

return doOCR(ImageIOHelper.getIIOImageList(bi), rect);

I'm using Gradle as my build tool with the dependency:

compile 'net.sourceforge.tess4j:tess4j:2.0.0'

(Any Maven solutions are fine!)

What am I missing? I've seen a few posts about including various .dll files, I thought Tess4J included all these?

Answer 1

It seems you need to have the Java Advanced Imaging I/O Tools as a dependency as well.

Add this to your dependency list

'com.sun.media:jai_imageio:1.1'

Answer 2

将jai_imageio jar添加到您的类路径中。