Peter at 16:49, 10 November 2022

2022-11-10T16:49:33Z

← Older revision		Revision as of 16:49, 10 November 2022
Line 15:		Line 15:

	Relevant Examples/Tutorials:		Relevant Examples/Tutorials:
			* [https://www.ninox360.com/barcode-scanner 2D Barcode Webapp]
	* [[Example_Render_Aztec_Code\|Rendering Aztec Codes]]		* [[Example_Render_Aztec_Code\|Rendering Aztec Codes]]
	* [[Example_Detect_QR_Code\|QR Codes]]		* [[Example_Detect_QR_Code\|QR Codes]]

Peter at 00:32, 3 September 2022

2022-09-03T00:32:15Z

← Older revision		Revision as of 00:32, 3 September 2022
Line 1:		Line 1:
	<center>		<center>
	<gallery widths=~~807px~~ heights=~~331px~~>		<gallery widths=350px heights=350px>
	File:Example_aztec_code_scan.jpg \| Aztec Code marker detected on a ticket.		File:Example_aztec_code_scan.jpg \| Aztec Code marker detected on a ticket.
	</gallery>		</gallery>

Peter: Created page with " File:Example_aztec_code_scan.jpg | Aztec Code marker detected on a ticket. [https://en.wikipedia.org/wiki/A..."

2022-09-03T00:28:14Z

Created page with "<center> <gallery widths=807px heights=331px> File:Example_aztec_code_scan.jpg | Aztec Code marker detected on a ticket. </gallery> </center> [https://en.wikipedia.org/wiki/A..."

New page

<center>
<gallery widths=807px heights=331px>
File:Example_aztec_code_scan.jpg | Aztec Code marker detected on a ticket.
</gallery>
</center>

[https://en.wikipedia.org/wiki/Aztec_Code Aztec Codes] are popular in transportation and related industries. They can encode a lot of information and don't require a quite zone around the marker. However, due to the lack of easily identified landmarks, larger markers are harder to scan.

Example Code:
* [https://github.com/lessthanoptimal/BoofCV/blob/v0.41/examples/src/main/java/boofcv/examples/fiducial/ExampleDetectAztecCode.java ExampleDetectAztecCode]

Concepts:
* Fiducials
* QR Codes

Relevant Examples/Tutorials:
* [[Example_Render_Aztec_Code|Rendering Aztec Codes]]
* [[Example_Detect_QR_Code|QR Codes]]
* [[Example_Detect_Micro_QR_Code|Micro QR Codes]]

= Example Code =

<syntaxhighlight lang="java">
/**
* Shows you how to detect an Aztec Code inside an image. BoofCV provides a lot of information about the marker and
* provides an accurate location of the finder pattern. For example, you can get the number of bit errors which
* were encountered while reading and will return failed detections with the reason they failed.
*
* @author Peter Abeles
*/
public class ExampleDetectAztecCode {
public static void main( String[] args ) {
BufferedImage input = UtilImageIO.loadImageNotNull(UtilIO.pathExample("fiducial/aztec/image01.jpg"));
GrayU8 gray = ConvertBufferedImage.convertFrom(input, (GrayU8)null);

var config = new ConfigAztecCode();
// config.considerTransposed = false; // by default, it will consider incorrectly encoded markers. Faster if false
AztecCodePreciseDetector<GrayU8> detector = FactoryFiducial.aztec(config, GrayU8.class);

detector.process(gray);

// Gets a list of all the qr codes it could successfully detect and decode
List<AztecCode> detections = detector.getDetections();

// Print the encoded messages
for (AztecCode marker : detections) {
System.out.println("message: '" + marker.message + "'");
}

// Visualize the found markers in the image
Graphics2D g2 = input.createGraphics();
int strokeWidth = Math.max(4, input.getWidth()/200); // in large images the line can be too thin
g2.setColor(Color.GREEN);
g2.setStroke(new BasicStroke(strokeWidth));
for (AztecCode marker : detections) {
VisualizeShapes.drawPolygon(marker.bounds, true, 1, g2);
}

// List of objects it thinks might be a QR Code but failed for various reasons
List<AztecCode> failures = detector.getFailures();
g2.setColor(Color.RED);
for (AztecCode marker : failures) {
// If it failed to decode the mode then there's a decent change of it being a false negative
if (marker.failure.ordinal() < AztecCode.Failure.MODE_ECC.ordinal())
continue;

VisualizeShapes.drawPolygon(marker.bounds, true, 1, g2);
}

ShowImages.showWindow(input, "Example Aztec Codes", true);
}
}
</syntaxhighlight>

Example Detect Aztec Code - Revision history

Peter at 16:49, 10 November 2022

Peter at 00:32, 3 September 2022

Peter: Created page with " File:Example_aztec_code_scan.jpg | Aztec Code marker detected on a ticket. [https://en.wikipedia.org/wiki/A..."