package javapplication15;
import org.opencv.core.Core;
import org.opencv.core.Mat;
import org.opencv.core.MatOfRect;
import org.opencv.core.Point;
import org.opencv.core.Rect;
import org.opencv.core.Scalar;
import org.opencv.highgui.Highgui;
import org.opencv.objdetect.CascadeClassifier;
class DetectFaceDemo {
public void run() {
System.out.println("\nRunning DetectFaceDemo");
CascadeClassifier faceDetector = new CascadeClassifier(getClass().getResource("/lbpcascade_frontalface.xml").getPath());
Mat image = Highgui.imread(getClass().getResource("/lena.png").getPath());
MatOfRect faceDetections = new MatOfRect();
faceDetector.detectMultiScale(image, faceDetections);
System.out.println(String.format("Detected %s faces", faceDetections.toArray().length));
for (Rect rect : faceDetections.toArray()) {
Core.rectangle(image, new Point(rect.x, rect.y), new Point(rect.x + rect.width, rect.y + rect.height), new Scalar(0, 255, 0));
}
String filename = "faceDetection.png";
System.out.println(String.format("Writing %s", filename));
Highgui.imwrite(filename, image);
}
}
public class HelloOpenCV {
public static void main(String[] args) {
System.out.println("Hello, OpenCV");
System.loadLibrary(Core.NATIVE_LIBRARY_NAME);
new DetectFaceDemo().run();
}
}
http://docs.opencv.org/doc/tutorials/introduction/desktop_java/java_dev_intro.html
I tried this tutorial mentioned above and got the following error.
Exception in thread "main" java.lang.NullPointerException
at javapplication15.DetectFaceDemo.run(HelloOpenCV.java:28)
at javapplication15.HelloOpenCV.main(HelloOpenCV.java:56)
Java Result: 1
I am pretty sure that the files are present in corresponding folders as mentioned in the Tutorial. I think this is a path issue and I tried things like giving the absolute path and other things that can be found online. Still not luck.
I am suing NetBeans 8.0, OpenCV 2.4.9 and Windows 8