drawing.application.FaceDetection.java Source code

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Here is the source code for drawing.application.FaceDetection.java

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/*
 * The MIT License
 *
 * Copyright 2015 Lawrence.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package drawing.application;

import javax.swing.JOptionPane;
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.imgcodecs.Imgcodecs;
import org.opencv.imgproc.Imgproc;
import org.opencv.objdetect.CascadeClassifier;

/**
 *
 * @author Lawrence and Nate
 */
public class FaceDetection implements Runnable {

    private final String filePath;

    public FaceDetection(String filePath) {
        this.filePath = filePath;
    }

    @Override
    public void run() {
        CascadeClassifier faceDetector = new CascadeClassifier("lbpcascade_frontalface.xml");
        Mat image = Imgcodecs.imread(filePath);

        MatOfRect faceDetections = new MatOfRect();
        faceDetector.detectMultiScale(image, faceDetections);

        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));
        }

        System.out.println(String.format("Writing %s", filePath));
        Imgcodecs.imwrite(filePath, image);

        int numFaces = faceDetections.toArray().length;
        JOptionPane.showMessageDialog(null,
                "Detected " + faceDetections.toArray().length + (numFaces == 1 ? " face" : " faces"));
    }

}