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 QR Codes
• 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.
 *
 * @author Peter Abeles
 * @see boofcv.alg.fiducial.qrcode.QrCodeGenerator
 */
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 it's 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 create images
		var render = new QrCodeGeneratorImage(/* pixel per module */ 20);

		render.render(qr);

		// Convert it to a BufferedImage for display purposes
		BufferedImage image = ConvertBufferedImage.convertTo(render.getGray(), null);

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

		// Display the image
		ShowImages.showWindow(image, "Rendered QR Code", true);
	}
}