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!这里是亿速云网站,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!
亿速云「云服务器」,即开即用、新一代英特尔至强铂金CPU、三副本存储NVMe SSD云盘,价格低至29元/月。点击查看>>
免责声明:本站发布的内容(图片、视频和文字)以原创、转载和分享为主,文章观点不代表本网站立场,如果涉及侵权请联系站长邮箱:is@yisu.com进行举报,并提供相关证据,一经查实,将立刻删除涉嫌侵权内容。