Example Render QR Code

• 

  The QR Code which this example will render. A white border needs to be added to be fully compliant.

This example shows how a QR Codes can be rendered into an image. Its easy to adapt the approach here for just about any file format.

Example Code:

• ExampleRenderQrCode.java

Concepts:

• Fiducials
• QR Codes

Relevant Examples/Tutorials:

• Tutorial Fiducials
• Detecting QR Codes

Relevant Videos:

• Youtube Document Creator

Example Code

/**
 * A simple API is provided for creating your own QR Codes. Used extensively in BoofCV for testing purposes.
 * It's also easy to extending the rendering tools to support other file formats.
 *
 * @see boofcv.alg.fiducial.qrcode.QrCodeGenerator
 *
 * @author Peter Abeles
 */
public class ExampleRenderQrCode
{
	public static void main(String[] args) {

		// Uses a flow pattern to specify the QR Code. You can control all aspects of the QR
		// like specifying the version, mask, and message types or let it select all of that for you.
		QrCode qr = new QrCodeEncoder().
				setError(QrCode.ErrorLevel.M).
				addAutomatic("This is a Test ん鞠").fixate();
		// NOTE: The final function you call must be fixate() that's how it knows its done

		// QrCodeGenerator is the base class with all the logic and the children tell it how to
		// write in a specific format. QrCodeGeneratorImage is included with BoofCV and is used
		// to creates images
		QrCodeGeneratorImage render = new QrCodeGeneratorImage(20);

		render.render(qr);

		// Convert it to a BufferedImage for display purposes
		BufferedImage image = ConvertBufferedImage.convertTo(render.getGray(),null);
		ShowImages.showWindow(image,"Rendered QR Code", true);

		// You can also save it to disk by uncommenting the line below
//		UtilImageIO.saveImage(image,"qrcode.png");

		// WARNING! This rendered image lacks the white border which is required to be a compliant
		//          QR Code. As of this writing BoofCV's implementation might not be able to handle
		//          this image unless you add a white border.
	}
}