OpenCV Java 示例 - 检测图像中的人脸

喜欢ヅ旅行 2023-10-02 11:18 157阅读 0赞

### 问题描述 ###

如何使用java检测图像中的人脸。

### 解决方案 ###

以下是使用java检测图像中人脸的程序。

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 = "F:/face_detection_input1.jpg";
          Mat src = Imgcodecs.imread(file);  
          
          //Instantiating the CascadeClassifier 
          String xmlFile = "F:/haarcascade_frontalface_default.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("F:/face_detection_output1.jpg", src); 
          
          System.out.println("Image Processed");  
       }     
    }

### 输入 ###

![watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBAYWxsd2F5Mg_size_17_color_FFFFFF_t_70_g_se_x_16][]

### 输出 ###

![watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBAYWxsd2F5Mg_size_17_color_FFFFFF_t_70_g_se_x_16 1][]

[watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBAYWxsd2F5Mg_size_17_color_FFFFFF_t_70_g_se_x_16]: https://img-blog.csdnimg.cn/20211010204356696.jpg?x-oss-process=image/watermark,type_ZHJvaWRzYW5zZmFsbGJhY2s,shadow_50,text_Q1NETiBAYWxsd2F5Mg==,size_17,color_FFFFFF,t_70,g_se,x_16
[watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBAYWxsd2F5Mg_size_17_color_FFFFFF_t_70_g_se_x_16 1]: https://img-blog.csdnimg.cn/20211010204429877.jpg?x-oss-process=image/watermark,type_ZHJvaWRzYW5zZmFsbGJhY2s,shadow_50,text_Q1NETiBAYWxsd2F5Mg==,size_17,color_FFFFFF,t_70,g_se,x_16