在Java语言编程中，如何使用java检测图像中的脸？

注意：需要访问网址：http://book2s.com/java/jar/o/opencv/download-opencv-3.2.0-0.html ， 下载一个OpenCV软件包。这里下载最新版本：opencv-3.2.0-vc14.exe并解压此文件到D:\software\opencv目录中。

项目结构如下图所示 -

添加一个用户自定义库：OpenCV3.2，并指配置构建路径为：D:\software\opencv\opencv\build\java\x64，如下图所示 -

注：可参考： http://blog.csdn.net/shawncheer/article/details/51098456

以下是使用Java检测图像中的脸的程序 -

package com.yiibai;

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.imgcodecs.Imgcodecs;  
import org.opencv.imgproc.Imgproc; 
import org.opencv.objdetect.CascadeClassifier;  

public class DetectingFaceInAnImage {  
   public static void main (String[] args) {     

      //Loading the OpenCV core library  
      System.loadLibrary( Core.NATIVE_LIBRARY_NAME ); 

      //Reading the Image from the file and storing it in to a Matrix object 
      String file = "images/zhanlang.jpg";
      Mat src = Imgcodecs.imread(file);  

      //Instantiating the CascadeClassifier 
      String xmlFile = "images/lbpcascade_frontalface.xml"; 
      CascadeClassifier classifier = new CascadeClassifier(xmlFile); 

      //Detecting the face in the snap 
      MatOfRect faceDetections = new MatOfRect(); 
      classifier.detectMultiScale(src, faceDetections);  
      System.out.println(String.format("Detected %s faces", 
         faceDetections.toArray().length));  

      //Drawing boxes  
      for (Rect rect : faceDetections.toArray()) { 
         Imgproc.rectangle(src,       //where to draw the box 
         new Point(rect.x, rect.y),   //bottom left 
         new Point(rect.x + rect.width, rect.y + rect.height),  //top right  
         new Scalar(0, 0, 255), 
         3);    //RGB color 
      } 
      //Writing the image     
      Imgcodecs.imwrite("images/facedetect_output1.jpg", src); 

      System.out.println("Image Processed");  
   }     
}

执行上面示例代码，得到以下结果 -

Image processed

原图 -

在执行上面示例代码成功后，应该会在 F:\worksp\javaexamples\java_opencv\images 目录中有看到生成一个文件：facedetect_output1.jpg 。

问题

F:\worksp\javaexamples\java_opencv
Exception in thread "main" java.lang.UnsatisfiedLinkError: no opencv_java320 in java.library.path
    at java.lang.ClassLoader.loadLibrary(Unknown Source)
    at java.lang.Runtime.loadLibrary0(Unknown Source)
    at java.lang.System.loadLibrary(Unknown Source)
    at com.yiibai.CopyAndPasteAnImage.main(CopyAndPasteAnImage.java:13)

解决上述问题可通过参考： http://blog.csdn.net/shawncheer/article/details/51098456

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