Issue with the libtesseract303.dll in netbeans

Question

I am implementing an OCR system. When I placed dll files on the java class path it gives the following error.

Exception in thread \"main\" java.lang.UnsatisfiedL         


        

Answer 1

Find below a small working example application. From there you could start to investigate and pick the parts you need.

Assuming the following structure and files

pom.xml
sample.gif
src/main/java/sub/optimal/tess4j/Demo.java
tessdata/eng.traineddata

pom.xml

    

    4.0.0
    sub.optimal
    Tess4JDemo
    1.0-SNAPSHOT
    jar
    
        UTF-8
        1.8
        1.8
        2.3
    
    
        
            net.sourceforge.tess4j
            tess4j
            3.0.0
            jar
        
        
            org.ghost4j
            ghost4j
            1.0.0
        
        
            org.apache.maven.plugins
            maven-shade-plugin
            ${maven.shade.version}
        
    
    
        
            
                org.codehaus.mojo
                exec-maven-plugin
                1.4.0
                
                    
                        
                            java
                        
                    
                
                
                    sub.optimal.tess4j.Demo
                
            
        
    

sample.gif

src/main/java/sub/optimal/tess4j/Demo.java

package sub.optimal.tess4j;
import java.io.File;
import net.sourceforge.tess4j.Tesseract;
import net.sourceforge.tess4j.TesseractException;
public class Demo {
    public static void main(String[] args) {
        File imageFile = new File("sample.gif");
        Tesseract instance = new Tesseract();
        try {
            String result = instance.doOCR(imageFile);
            System.out.println(result);
        } catch (TesseractException e) {
            e.printStackTrace(System.err);
        }
    }
}

tessdata/eng.traineddata was downloaded from https://tesseract-ocr.googlecode.com/files/eng.traineddata.gz (don't forget to uncompress the file)

Running this small example with mvn exec:java produce the following output

[INFO] --- exec-maven-plugin:1.4.0:java (default-cli) @ Tess4JDemo ---
Hello OCR!