TY - JOUR
AU1 - Oztan, Basak
AU2 - Sharma, Gaurav
AB - A framework for clustered-dot color halftone watermarking is proposed. Watermark patterns are embedded in the color halftone on per-separation basis. For typical CMYK printing systems, common desktop RGB color scanners are unable to provide the individual colorant halftone separations, which confounds per-separation detection methods. Not only does the K colorant consistently appear in the scanner channels as it absorbs uniformly across the spectrum, but cross-couplings between CMY separations are also observed in the scanner color channels due to unwanted absorptions. We demonstrate that by exploiting spatial frequency and color separability of clustered-dot color halftones, estimates of the individual colorant halftone separations can be obtained from scanned RGB images. These estimates, though not perfect, allow per-separation detection to operate efficiently. The efficacy of this methodology is demonstrated using continuous phase modulation for the embedding of per-separation watermarks.
TI - Clustered-dot color halftone watermarks using spatial frequency and color separability
JF - Proceedings of SPIE
DO - 10.1117/12.839293
DA - 2010-01-17
UR - https://www.deepdyve.com/lp/spie/clustered-dot-color-halftone-watermarks-using-spatial-frequency-and-kqm6yWgOkN
SP - 75280Y
EP - 75280Y-12
VL - 7528
IS - 1
DP - DeepDyve
ER -