Eclipse+Java+OpenCV246人脸检测                     

1.环境搭建：见上一篇博客

整个项目的结构图：

2.编写DetectFaceDemo.java,代码如下：

[java] view plaincopyprint?

1. package com.njupt.zhb.test;
2. import org.opencv.core.Core;
3. import org.opencv.core.Mat;
4. import org.opencv.core.MatOfRect;
5. import org.opencv.core.Point;
6. import org.opencv.core.Rect;
7. import org.opencv.core.Scalar;
8. import org.opencv.highgui.Highgui;
9. import org.opencv.objdetect.CascadeClassifier;
11. //
12. // Detects faces in an image, draws boxes around them, and writes the results
13. // to ”faceDetection.png”.
14. //
15. public class DetectFaceDemo {
16.   public void run() {
17.     System.out.println(“\nRunning DetectFaceDemo”);
18.     System.out.println(getClass().getResource(“lbpcascade_frontalface.xml”).getPath());
19.     // Create a face detector from the cascade file in the resources
20.     // directory.
21.     //CascadeClassifier faceDetector = new CascadeClassifier(getClass().getResource(“lbpcascade_frontalface.xml”).getPath());
22.     //Mat image = Highgui.imread(getClass().getResource(“lena.png”).getPath());
23.     //注意：源程序的路径会多打印一个‘/’，因此总是出现如下错误
24.         /*
25.          * Detected 0 faces Writing faceDetection.png libpng warning: Image
26.          * width is zero in IHDR libpng warning: Image height is zero in IHDR
27.          * libpng error: Invalid IHDR data
28.          */
29.     //因此，我们将第一个字符去掉
30.     String xmlfilePath=getClass().getResource(“lbpcascade_frontalface.xml”).getPath().substring(1);
31.     CascadeClassifier faceDetector = new CascadeClassifier(xmlfilePath);
32.     Mat image = Highgui.imread(getClass().getResource(“we.jpg”).getPath().substring(1));
33.     // Detect faces in the image.
34.     // MatOfRect is a special container class for Rect.
35.     MatOfRect faceDetections = new MatOfRect();
36.     faceDetector.detectMultiScale(image, faceDetections);
38.     System.out.println(String.format(“Detected %s faces”, faceDetections.toArray().length));
40.     // Draw a bounding box around each face.
41.     for (Rect rect : faceDetections.toArray()) {
42.         Core.rectangle(image, new Point(rect.x, rect.y), new Point(rect.x + rect.width, rect.y + rect.height), new Scalar(0, 255, 0));
43.     }
45.     // Save the visualized detection.
46.     String filename = ”faceDetection.png”;
47.     System.out.println(String.format(“Writing %s”, filename));
48.     Highgui.imwrite(filename, image);
49.   }
50. }

package com.njupt.zhb.test;
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;

//
// Detects faces in an image, draws boxes around them, and writes the results
// to "faceDetection.png".
//
public class DetectFaceDemo {
  public void run() {
    System.out.println("\nRunning DetectFaceDemo");
    System.out.println(getClass().getResource("lbpcascade_frontalface.xml").getPath());
    // Create a face detector from the cascade file in the resources
    // directory.
    //CascadeClassifier faceDetector = new CascadeClassifier(getClass().getResource("lbpcascade_frontalface.xml").getPath());
    //Mat image = Highgui.imread(getClass().getResource("lena.png").getPath());
    //注意：源程序的路径会多打印一个‘/’，因此总是出现如下错误
		/*
		 * Detected 0 faces Writing faceDetection.png libpng warning: Image
		 * width is zero in IHDR libpng warning: Image height is zero in IHDR
		 * libpng error: Invalid IHDR data
		 */
    //因此，我们将第一个字符去掉
    String xmlfilePath=getClass().getResource("lbpcascade_frontalface.xml").getPath().substring(1);
    CascadeClassifier faceDetector = new CascadeClassifier(xmlfilePath);
    Mat image = Highgui.imread(getClass().getResource("we.jpg").getPath().substring(1));
    // Detect faces in the image.
    // MatOfRect is a special container class for Rect.
    MatOfRect faceDetections = new MatOfRect();
    faceDetector.detectMultiScale(image, faceDetections);

    System.out.println(String.format("Detected %s faces", faceDetections.toArray().length));

    // Draw a bounding box around each face.
    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));
    }

    // Save the visualized detection.
    String filename = "faceDetection.png";
    System.out.println(String.format("Writing %s", filename));
    Highgui.imwrite(filename, image);
  }
}

3.编写测试类：

[java] view plaincopyprint?

1. package com.njupt.zhb.test;
2. public class TestMain {
3.   public static void main(String[] args) {
4.     System.out.println(“Hello, OpenCV”);
5.     // Load the native library.
6.     System.loadLibrary(“opencv_java246″);
7.     new DetectFaceDemo().run();
8.   }
9. }
10. //运行结果:
11. //Hello, OpenCV
12. //
13. //Running DetectFaceDemo
14. ///E:/eclipse_Jee/workspace/JavaOpenCV246/bin/com/njupt/zhb/test/lbpcascade_frontalface.xml
15. //Detected 8 faces
16. //Writing faceDetection.png

package com.njupt.zhb.test;
public class TestMain {
  public static void main(String[] args) {
    System.out.println("Hello, OpenCV");
    // Load the native library.
    System.loadLibrary("opencv_java246");
    new DetectFaceDemo().run();
  }
}
//运行结果:
//Hello, OpenCV
//
//Running DetectFaceDemo
///E:/eclipse_Jee/workspace/JavaOpenCV246/bin/com/njupt/zhb/test/lbpcascade_frontalface.xml
//Detected 8 faces
//Writing faceDetection.png

运行结果：

源码下载：http://download.csdn.net/detail/nuptboyzhb/5961985

未经允许，不得用于商业目的