Back-compatible Color QR Codes for colorimetric applications

Color correction techniques in digital photography often rely on the use of color charts, which require including this relatively large object field view. We propose here to QR Codes pack these charts a compact form factor, fully compatible manner with conventional black and white Codes; is, without losing any their easy location, sampling data storage features. First, we present an algorithm build new colored that preserves original Code functionality - much more than other coloring proposals based random substitution pixels by colors relies ability native CRC code correct counteract alterations. Second, demonstrate that, as result, can allocate far many enabling accurate schemes convenient usable format.