| 摘要 |
PROBLEM TO BE SOLVED: To provide an improved method for detection of miniature security marks within documents and images. SOLUTION: Dispersed miniature security marks may include data marks or a combination of data marks and anchor marks. The method includes sub-sampling a received image, which is a digital representation possible recipient(s) of the miniature security marks, to generate a reduced-resolution image of the received image. Maximum/minimum points detection is performed and the maximum/minimum points are grouped into one or more clusters according to location distances between the maximum/minimum points. Group configuration is checked to match the clusters with a pre-defined template configuration. Dot parameter verification is then performed to verify mark location and configuration between the received image and a pre-defined template dot specification. COPYRIGHT: (C)2008,JPO&INPIT
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