Facsimile and static presentation processing – Static presentation processing – Attribute control
Reexamination Certificate
2002-11-26
2008-10-21
Poon, King (Department: 2625)
Facsimile and static presentation processing
Static presentation processing
Attribute control
C380S055000
Reexamination Certificate
active
07440143
ABSTRACT:
A tampering judgement system is provided which is capable of easily checking whether or not a printed document has been tampered. An image feature information extracting section extracts image feature information from a document image. An image feature information embedding section gives image feature information integrally as original image feature information to a document and a document image output section outputs the information as a printed document. When the printed document is given to the tampering judgement system, the image data is read by a document image reading section. An image feature information extracting section extracts image feature information contained in a document being an object for judgement on tampering. An embedding information extracting section extracts original image feature information from image data. A judging section compares original feature information with image feature information contained in the printed document and if a difference between them exceeds a predetermined threshold value, the document is judged to have been tampered.
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Kau Steven
OKI Electric Industry Co., Ltd.
Poon King
Sartori Michael A.
Venable LLP
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