Device using low visibility encoded image to manage copy...

Details Device using low visibility encoded image to manage copy... Device using low visibility encoded image to manage copy...

2011-03-22

2011-03-22

Haskins, Twyler L (Department: 2625)

Facsimile and static presentation processing

Static presentation processing

Attribute control

C358S001130, C358S001140, C358S001180, C358S003230, C714S001000, C714S100000

Reexamination Certificate

active

07911653

ABSTRACT:
The present invention relates to an image forming device using a low visibility information embedding technique to manage a copy history of an original. The image forming device embeds history information with the use of small dots disappearing by copying, and coordinate information on a region embedded with the history information with the use of large dots not disappearing even by copying. Upon first copying, the image forming device newly creates both of the large dot coordinate information and the small dot history information, and embeds them. Upon second or later copying, the image forming device updates the history information having been read out of the original with that on the current copying, and embeds the updated history information in the history information region indicated by the coordinate information.

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