Title:
小型セキュリティマークの検出のための方法
Document Type and Number:
Japanese Patent JP4827807
Kind Code:
B2
Abstract:
A method is disclosed for detection of miniature security mark configurations within documents and images, wherein the 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. Shape verification is then performed to verify mark location and configuration between the reduced-resolution image and the received image.
Inventors:
Zigan Fan
Application Number:
JP2007204546A
Publication Date:
November 30, 2011
Filing Date:
August 06, 2007
Export Citation:
Assignee:
XEROX CORPORATION
International Classes:
H04N1/387; G06T1/00; H04N1/40
Domestic Patent References:
| JP2001024888A | ||||
| JP11215369A | ||||
| JP2003289437A | ||||
| JP2002352240A |
Attorney, Agent or Firm:
Atsushi Nakajima
Kato Kazunori
Kato Kazunori