| US 7,548,340 B2 | ||
| Method, program, and apparatus for prohibiting a reproduction of an anti-copy document, and a medium storing the program | ||
| Masaaki Ishikawa, Tokyo (Japan); Haike Guan, Kanagawa-ken (Japan); and Takashi Saitoh, Kanagawa-ken (Japan) | ||
| Assigned to Ricoh Company, Ltd., Tokyo (Japan) | ||
| Filed on Jul. 13, 2004, as Appl. No. 10/889,258. | ||
| Claims priority of application No. 2003-197193 (JP), filed on Jul. 15, 2003; and application No. 2004-003939 (JP), filed on Jan. 09, 2004. | ||
| Prior Publication US 2005/0052682 A1, Mar. 10, 2005 | ||
| Int. Cl. G06F 15/00 (2006.01); G06K 1/00 (2006.01); H04N 1/60 (2006.01); H04N 1/40 (2006.01); G06K 15/00 (2006.01) | ||
| U.S. Cl. 358—1.9 [358/1.14; 358/3.28] | 56 Claims |
| 11. An image processing apparatus, comprising:
first storing means for storing a first reference value representing a first characteristic quantity of a predetermined background
dot pattern;
second storing means for storing a second reference value representing a second characteristic quantity of the predetermined
background dot pattern;
first copy protecting means for performing a first copy protection operation which detects a characteristic quantity from
image data of an original image, compares the characteristic quantity from the image data of the original image with the first
reference value stored in the first storing means, and determines whether the characteristic quantity from the image data
of the original image is identical to the first reference value; and
second copy protecting means for performing a second copy protection operation, different from the first copy protection operation,
which detects a characteristic quantity from the image data of the original image, compares the characteristic quantity from
the image data of the original image with the second reference value stored in the second storing means, and determines whether
the characteristic quantity from the image data of the original image is identical to the second reference value,
wherein the first and second copy protecting means simultaneously perform the first and second copy protection operations.
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