Desktop: OpenCV take a clear picture

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

public class OpenCV_webcam2 {

	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("Error");
		}else {
			Mat frame = new Mat();
			try {
				System.out.println("Use webcam beat lighting Ryo version");
				camera.read(frame);
				Thread.sleep(500);
				camera.read(frame);
				Thread.sleep(500);
				camera.read(frame);
				Thread.sleep(500);
				
				Imgcodecs.imwrite("D:\\projects\\Java\\OpenCV_Samples\\resource\\imgs\\frame_clear.jpg ",frame);
				System.out.println("Completion of clapping");
				
			}catch(Exception e) {
				e.printStackTrace();
			}
		}
		camera.release();
	}
}

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