java证件照 java拍照

由于项目需要拍照，看了好多的资料不是C语言的就是python，开始用的JavaCv但是有好多问题，所以改成了OpenCv

只能硬着上了，查了好的网上的资料，终于找到了

依赖jar包：只有一个OpenCv的jar包，可以直接从官网上下载

下面上代码

import java.awt.Graphics;
import java.awt.event.MouseAdapter;
 import java.awt.event.MouseEvent;
 import java.awt.image.BufferedImage;
 import javax.swing.JFrame;
 import javax.swing.JPanel;
 import javax.swing.WindowConstants;
 import org.opencv.core.Core;
 import org.opencv.core.Mat;
 import org.opencv.imgcodecs.Imgcodecs;
 import org.opencv.imgproc.Imgproc;
 import org.opencv.videoio.VideoCapture;
 import org.opencv.videoio.Videoio;public class CaptureBasic extends JPanel {
    private static BufferedImage mImg;
     private static VideoCapture capture;
     private static  Mat capImg;    private BufferedImage mat2BI(Mat mat){
         int dataSize =mat.cols()*mat.rows()*(int)mat.elemSize();
         byte[] data=new byte[dataSize];
         mat.get(0, 0,data);
         int type=mat.channels()==1?
                 BufferedImage.TYPE_BYTE_GRAY:BufferedImage.TYPE_3BYTE_BGR;        if(type==BufferedImage.TYPE_3BYTE_BGR){
             for(int i=0;i<dataSize;i+=3){
                 byte blue=data[i+0];
                 data[i+0]=data[i+2];
                 data[i+2]=blue;
             }
         }
         BufferedImage image=new BufferedImage(mat.cols(),mat.rows(),type);
         image.getRaster().setDataElements(0, 0, mat.cols(), mat.rows(), data);        return image;
     }    public void paintComponent(Graphics g){
         if(mImg!=null){
             g.drawImage(mImg, 0, 0, mImg.getWidth(),mImg.getHeight(),this);
         }
     }    public static void main(String[] args) {
         try{
             System.loadLibrary(Core.NATIVE_LIBRARY_NAME);            capImg=new Mat();
             capture =new VideoCapture(0);
            // capture.open(0);
             int height = (int)capture.get(Videoio.CAP_PROP_FRAME_HEIGHT);
             int width = (int)capture.get(Videoio.CAP_PROP_FRAME_WIDTH);
             if(height==0||width==0){
                 throw new Exception("camera not found!");
             }            JFrame frame=new JFrame("camera");
             frame.setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);
             CaptureBasic panel=new CaptureBasic();
             panel.addMouseListener(new MouseAdapter() {
                 @Override
                 public void mouseClicked(MouseEvent arg0) {
                      System.out.println("click");
                      saveImg();
                 }
                 @Override
                 public void mouseMoved(MouseEvent arg0) {
                     System.out.println("move");                }
                 @Override
                 public void mouseReleased(MouseEvent arg0) {
                     System.out.println("mouseReleased");
                 }
                 @Override
                 public void mousePressed(MouseEvent arg0) {
                     System.out.println("mousePressed");
                 }
                 @Override
                 public void mouseExited(MouseEvent arg0) {
                     System.out.println("mouseExited");
                     //System.out.println(arg0.toString());
                 }
                 @Override
                 public void mouseDragged(MouseEvent arg0) {
                     System.out.println("mouseDragged");
                     //System.out.println(arg0.toString());
                 }});
             frame.setContentPane(panel);
             frame.setVisible(true);
             frame.setSize(width+frame.getInsets().left+frame.getInsets().right,
                     height+frame.getInsets().top+frame.getInsets().bottom);
             int n=0;
             Mat temp=new Mat();
             while(frame.isShowing()&& n<5){
                 System.out.println("第"+n+"张");
                 capture.read(capImg);
                 Imgproc.cvtColor(capImg, temp, Imgproc.COLOR_BGRA2BGR);
                
                // Imgcodecs.imwrite("C:/HWKJ/opencv/"+n+".png", temp); //自动保存
                
                // panel.mImg=panel.mat2BI(detectFace(capImg));
                
                 panel.mImg=panel.mat2BI(capImg);
                 panel.repaint();
                // n++;
                 //break;
             }
             capture.release();
            // frame.dispose();
         }catch(Exception e){
             System.out.println("例外：" + e);
         }finally{
             System.out.println("--done--");
         }    }
     
     //点击面板
     public static void saveImg(){
         Mat temp=new Mat();
         int height = (int)capture.get(Videoio.CAP_PROP_FRAME_HEIGHT);
         int width = (int)capture.get(Videoio.CAP_PROP_FRAME_WIDTH);
         capture.read(capImg);
         Imgproc.cvtColor(capImg, temp, Imgproc.COLOR_BGRA2BGR);
         Imgcodecs.imwrite("C:/HWKJ/opencv/aaa.png", temp);
         System.out.println("保存图片");
     }
 }

 点击在对应目录下生成的照片