[JAVA] Desktop: OpenCV take a picture

Goal
Take a picture using opencv with webcam.

opencv_webcam1.java


import org.opencv.core.Core;
import org.opencv.core.Mat;
import org.opencv.imgcodecs.Imgcodecs;
import org.opencv.videoio.VideoCapture;

public class Opencv_webcam1{

	static {
		System.loadLibrary(Core.NATIVE_LIBRARY_NAME);
	}
	
	public static void main(String[] args) {
		VideoCapture camera = new VideoCapture();
		camera.open(0);
		
		if(!camera.isOpened()) {
			System.out.println("Camera not open");
		}else {
			Mat frame = new Mat();
			try {
				System.out.println("Use webcam rhythm");
				camera.read(frame);
				Imgcodecs.imwrite("D:\\projects\\Java\\OpenCV_Samples\\resource\\imgs\\frame.jpg ",frame);
				System.out.println("Completion of clapping");
				
			}catch (Exception e) {
				e.printStackTrace();
			}
			camera.release();
		}
		
	}

}

Result
![frame.jpg](https://qiita-image-store.s3.ap-northeast-1.amazonaws.com/0/276243/11ca6473-2951-b521-a2e0-dabd0e629043.jpeg)

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