Patent attributes
The present disclosure relates to signal encoding and decoding, such as digital watermarking. One aspect of the technology relates a method of evaluating print quality of a test digital watermarking patch. The method includes: determining a reading window representing a distance in inches or centimeters from the test digital watermark patch and a camera utilized to collect a set of image frames depicting the test digital watermark patch, the test digital watermark patch comprising a first plural-bit payload, the reading window comprising a close edge and a far edge, the close edge representing a closest distance between the test digital watermark patch and the camera at which the first plural-bit payload can be decoded, and the far edge representing a farthest distance between the test digital watermark patch and the camera at which the first plural-bit payload can be decoded; determining a size ratio representing a size of the test digital watermark patch relative to the close edge and a size of the test digital watermark patch relative to the far edge; and utilizing the size ratio to evaluate the print quality of the test digital watermarking patch. Other aspects are described as well.
