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利用Java+OpenCV实现拍照功能

作者:Java璐到底

网上大多是利用C语言或者Python实现拍照功能,本文将为大家介绍另一种方法,即在Java中调用OpenCV实现拍照功能,感兴趣的可以了解一下

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 {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

到此这篇关于利用Java+OpenCV实现拍照功能的文章就介绍到这了,更多相关Java OpenCV拍照内容请搜索脚本之家以前的文章或继续浏览下面的相关文章希望大家以后多多支持脚本之家!

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