本篇内容主要讲解“如何用Java+OpenCV实现拍照功能”，感兴趣的朋友不妨来看看。本文介绍的方法操作简单快捷，实用性强。下面就让小编来带大家学习“如何用Java+OpenCV实现拍照功能”吧!
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 {undefined private static BufferedImage mImg; private static VideoCapture capture; private static Mat capImg; private BufferedImage mat2BI(Mat mat){undefined 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){undefined for(int i=0;i<dataSize;i+=3){undefined 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){undefined if(mImg!=null){undefined g.drawImage(mImg, 0, 0, mImg.getWidth(),mImg.getHeight(),this); } } public static void main(String[] args) {undefined try{undefined 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){undefined 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() {undefined @Override public void mouseClicked(MouseEvent arg0) {undefined System.out.println("click"); saveImg(); } @Override public void mouseMoved(MouseEvent arg0) {undefined System.out.println("move"); } @Override public void mouseReleased(MouseEvent arg0) {undefined System.out.println("mouseReleased"); } @Override public void mousePressed(MouseEvent arg0) {undefined System.out.println("mousePressed"); } @Override public void mouseExited(MouseEvent arg0) {undefined System.out.println("mouseExited"); //System.out.println(arg0.toString()); } @Override public void mouseDragged(MouseEvent arg0) {undefined 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){undefined 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){undefined System.out.println("例外：" + e); }finally{undefined System.out.println("--done--"); } } //点击面板 public static void saveImg(){undefined 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
到此，相信大家对“如何用Java+OpenCV实现拍照功能”有了更深的了解，不妨来实际操作一番吧！这里是编程网网站，更多相关内容可以进入相关频道进行查询，关注我们，继续学习！
