Eclipse+Java+OpenCV246人脸识别

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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：

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：

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：