Figure 2 from: Diazgranados M, Funk V (2013) Utility of QR codes in biological collections. PhytoKeys 25: 21-34. https://doi.org/10.3897/phytokeys.25.5175

Figure 2 - QR code structure and tolerance. Left: QR code with the maximum level of error correction (H: 30% of tolerance to damage). Right: Structure of the same QR code: yellow: quiet zone; red: position; orange: alignment; blue: timing; green: format information; cyan: version; grey and white: data and error correction modules.<br> Encoded text (including returns):<br> "US National Herbarium<br> Montanoa josei V.A. Funk (Asteraceae)<br> US Sheet No.: 2325539 | Barcode: 00128657<br> Specimen photographs: http://collections.mnh.si.edu/search/botany/search.php?action=10&amp;irn=10076557&amp;width=495&amp;height=640"