在java中捕获来自网络摄像头的图像？ [英] Capturing image from webcam in java?

问题描述

如何从网络摄像头连续捕获图像？

How can I continuously capture images from a webcam?

我想尝试对象识别（可能使用java媒体框架）。

I want to experiment with object recognition (by maybe using java media framework).

我想创建两个线程

一个线程：

• 节点1：捕获实时图像


• 节点2：将图像保存为1.jpg


• 节点3：等待5秒


• 节点4：重复...

• Node 1: capture live image
• Node 2: save image as "1.jpg"
• Node 3: wait 5 seconds
• Node 4: repeat...

其他线程：

• 节点1：等到拍摄图像


• 节点2：使用1。 jpg从每个pixle获取颜色
  


• 节点3：在数组中保存数据


• 节点4：重复...

• Node 1: wait until image is captured
• Node 2: using the "1.jpg" get colors from every pixle
• Node 3: save data in arrays
• Node 4: repeat...

推荐答案

这个JavaCV实现工作正常。

This JavaCV implementation works fine.

代码：

import org.bytedeco.javacv.*;

import static org.bytedeco.javacpp.opencv_core.IplImage;
import static org.bytedeco.javacpp.opencv_core.cvFlip;
import static org.bytedeco.javacpp.opencv_imgcodecs.cvSaveImage;


/**
 * Created by gtiwari on 1/3/2017.
 */

public class Test implements Runnable {
    final int INTERVAL = 100;///you may use interval
    CanvasFrame canvas = new CanvasFrame("Web Cam");

    public Test() {
        canvas.setDefaultCloseOperation(javax.swing.JFrame.EXIT_ON_CLOSE);
    }

    public void run() {

        FrameGrabber grabber = new VideoInputFrameGrabber(0); // 1 for next camera
        OpenCVFrameConverter.ToIplImage converter = new OpenCVFrameConverter.ToIplImage();
        IplImage img;
        int i = 0;
        try {
            grabber.start();
            while (true) {
                Frame frame = grabber.grab();

                img = converter.convert(frame);

                //the grabbed frame will be flipped, re-flip to make it right
                cvFlip(img, img, 1);// l-r = 90_degrees_steps_anti_clockwise

                //save
                cvSaveImage((i++) + "-aa.jpg", img);

                canvas.showImage(converter.convert(img));

                Thread.sleep(INTERVAL);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public static void main(String[] args) {
        Test gs = new Test();
        Thread th = new Thread(gs);
        th.start();
    }
}

还有发布JavaCV配置

您可以修改代码，并能够定期保存图像并完成所需的其余处理。

You can modify the codes and be able to save the images in regular interval and do rest of the processing you want.

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