Image analysis – Applications
Reexamination Certificate
2008-08-14
2011-11-22
Lu, Tom Y (Department: 2624)
Image analysis
Applications
C382S135000
Reexamination Certificate
active
08064637
ABSTRACT:
A method and system for identifying a fluorescence mark in a printed document includes using an image acquisition device to derive an input digital image. For each pixel of at least one of the input image color channels, the gray value is adjusted to define a filtered digital image including a plurality of pixels each defined by an adjusted gray value. A binary image is derived that that represents the filtered digital image. The binary image includes a binary representation of the fluorescence mark and a binary representation of the background. At least one morphological operation is performed on the binary image. An ASCII character for the binary representation of the fluorescence mark (or each constituent character thereof) is derived and compared to a known security code to authenticate the printed document.
REFERENCES:
patent: 4185304 (1980-01-01), Holladay
patent: 4299325 (1981-11-01), Quinton et al.
patent: 5136401 (1992-08-01), Yamamoto et al.
patent: 6470093 (2002-10-01), Liang
patent: 2007/0176966 (2007-08-01), Morimoto et al.
patent: 2007/0262579 (2007-11-01), Bala et al.
patent: 2007/0264476 (2007-11-01), Bala et al.
Bala Raja
Eschbach Reiner
Zhao Yonghui
Fay Sharpe LLP
Lu Tom Y
Xerox Corporation
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