Image forming apparatus and copy management system

Details Image forming apparatus and copy management system Image forming apparatus and copy management system

1997-07-15

1999-11-16

Gregory, Bernarr E.

Cryptography

Cryptanalysis

380 3, 380 4, 380 5, 380 6, 380 9, 380 10, 380 49, 380 54, H04N 716, H04L 900

Patent

active

059871270

ABSTRACT:
Additional data useful for the management of copies of a document for an image forming apparatus is embedded in a hard copy of the document. The additional data is embedded in an inherent image of a document as pixels arranged in a prescribed format, and, preferably, the size of the pixels is such as to not be easily recognized with the naked eye. The image data for embedding the additional data can be obtained by reading a document, or by receiving data sent from a computer or read from a floppy disk. Additional data embedded in a hard copy can be extracted from the image data on the hard copy, and the production of a copy according to the image data can be controlled according to the extracted additional data. For example, if the additional data means that the source of the hard copy is a secret document, copying thereof is allowed only for a legitimate user. Additional data generated for each copy is compiled and is used to manage copies of various sources systematically.

REFERENCES:
patent: 3784289 (1974-01-01), Wicker
patent: 4837737 (1989-06-01), Watanabe
patent: 4847641 (1989-07-01), Tung
patent: 5212558 (1993-05-01), Obata et al.
patent: 5231663 (1993-07-01), Earl et al.
patent: 5243655 (1993-09-01), Wang
patent: 5245655 (1993-09-01), Buhn et al.
patent: 5721788 (1998-02-01), Powell et al.
Yasuhiro Nakamura & Kineo Matusi, "A Unified Coding Method of Image and Text Data Using Three-Level Micro-Patterns," Gazou Densi Gakkaishi vol. 17, No. 1 (1988) pp. 3-9 (Japanese with Translation).

Affiliated with

Also associated with

Rating

Image forming apparatus and copy management system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Image forming apparatus and copy management system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Image forming apparatus and copy management system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1334387