package application;
import org.opencv.core.Core; import org.opencv.core.Rect; import org.opencv.core.Mat; import org.opencv.core.MatOfRect; import org.opencv.core.Point; import org.opencv.core.Scalar; import org.opencv.imgcodecs.Imgcodecs; import org.opencv.imgproc.Imgproc; import org.opencv.objdetect.CascadeClassifier;
public class FaceDetector {
public static void main(String[] args) {
System.loadLibrary(Core.NATIVE_LIBRARY_NAME);
System.out.println("\nRunning FaceDetector...................");
CascadeClassifier faceDetector = new CascadeClassifier(FaceDetector.class.getResource("haarcascade_frontalface_alt.xml").getPath().substring(1));
Mat image = Imgcodecs.imread(FaceDetector.class.getResource("D:\\wallpaper\\my.jpg").getPath().substring(1));
MatOfRect faceDetections = new MatOfRect();
faceDetector.detectMultiScale(image, faceDetections);
System.out.println(String.format("Detected %s faces", faceDetections.toArray().length));
for (Rect rect : faceDetections.toArray()) {
Imgproc.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 = "ouput.jpg";
System.out.println(String.format("Writing %s", filename));
Imgcodecs.imwrite(filename, image);
}
}
OUTPUT::::::
Running FaceDetector......................... Exception in thread "main" java.lang.NullPointerException at application.FaceDetector.main(FaceDetector.java:22)
