| 摘要 |
PROBLEM TO BE SOLVED: To provide a method and system for detecting embedded patterns in halftoned image data which yield differential gloss patterns when those halftoned image data are printed into hardcopy. SOLUTION: The method includes identifying a digital image having a periodic characteristic which is indicative of a cluster screen halftoned digital image and judging a correlation between first and second filters and halftone structures of the identified digital image. The second filter has a different polarization from the first filter. The first and the second filters are selected to enable a region of differential gloss in the identified digital image to be identified, on the basis of the judged correlations. COPYRIGHT: (C)2008,JPO&INPIT
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