JavaCV/OpenCV 二维码扫描功能

JavaCV/OpenCV 二维码扫描功能
怎样配置工程就不再赘述，不清楚的读者可以网上查找资料，二维码扫描功能通过JavaCV实现起来还是挺简单的，主要OpenCV中QRCodeDetector提供强大的API，识别速度个人感觉以微信(经常扫不到)来作对比还是快许多。

		//本地安装的摄像头驱动可能有多个，选择合适的
		VideoInputFrameGrabber grabber = VideoInputFrameGrabber.createDefault(1);
		grabber.start();
		QRCodeDetector qrCodeDetector = new QRCodeDetector();
		OpenCVFrameConverter.ToMat frameConverter = new OpenCVFrameConverter.ToMat();
		String windowTitle = "QR SCAN";
		Frame frame = null;
		int count = 0;
		while ((frame = grabber.grabFrame()) != null) {
     
			Mat img = frameConverter.convertToMat(frame);//如果需要扩展可以在图像前面添加扫描框
			int imageWidth = img.size().width();
			int imageHeight = img.size().height();
			int hStartPosition = Float.valueOf(imageHeight * 0.2f).intValue();
			int maxPostion = Float.valueOf(imageHeight * 0.8f).intValue();
			int lineHeight = hStartPosition + Float.valueOf(count++ * 0.05f * imageHeight).intValue();
			if (lineHeight > maxPostion) {
     
				lineHeight = hStartPosition;
				count = 0;
			}
			Point pt1 = new Point(Float.valueOf(imageWidth * 0.2f).intValue(), lineHeight);
			Point pt2 = new Point(Float.valueOf(imageWidth * 0.8f).intValue(), lineHeight);
			opencv_imgproc.line(img, pt1, pt2, Scalar.WHITE, 5, opencv_imgproc.LINE_8, 0);
			opencv_highgui.imshow(windowTitle, img);
			StringVector decoded_info = new StringVector();
			boolean success = qrCodeDetector.detectAndDecodeMulti(img, decoded_info);
			if (success) {
     
				BytePointer bytePointer = decoded_info.get(0);
				this.output("结果：" + bytePointer.getString());
				break;
			}
			int cvWaitKey = opencv_highgui.cvWaitKey(50);
			if (cvWaitKey == 27) {
     
				break;
			}
		}
		grabber.close();
		qrCodeDetector.close();