Fig. 11From: Design of image barcodes for future mobile advertisingIllustration of the print-and-scan analysis. a When printing, a synchronized outer ring of a chessboard pattern is placed outside the data-embedded halftone. b A portion scan of the data-embedded halftone obtained using the proposed method (printed at 150 dpi and scanned at 600 dpi). The red squaremark represents the position of the scanned part. (Top right) digital halftone, and (bottom right) the corresponding scanned partBack to article page