Image processor and image processing method

Details Image processor and image processing method Image processor and image processing method

2005-10-25

2005-10-25

Zand, Kambiz (Department: 2132)

Electrical computers and digital processing systems: support

Multiple computer communication using cryptography

Particular communication authentication technique

C713S168000, C705S075000, C382S276000, C382S279000, C382S285000

Reexamination Certificate

active

06959385

ABSTRACT:
To provide a device capable of determining uniquely the direction of rotation applied to an image and extracting digital watermark information correctly even in the case where a registration signal having a symmetric axis is embedded. A device for enabling digital watermark information to be extracted from image data having the digital watermark information embedded therein in such a manner that it can hardly be perceived by human eyes, in which processing for extracting rotation information and position information from the image data is performed plural times for rotation angles different from one another. For extracted position and rotation information, confidence coefficients indicating accuracy thereof are calculated. The position and rotation angle at which the digital watermark information is embedded are determined based on the confidence coefficients.

REFERENCES:
patent: 4873653 (1989-10-01), Grosskopf
patent: 5561534 (1996-10-01), Ishida et al.
patent: 5600720 (1997-02-01), Iwamura et al.
patent: 5666419 (1997-09-01), Yamamoto et al.
patent: 5694486 (1997-12-01), Shigeeda et al.
patent: 5748777 (1998-05-01), Katayama et al.
patent: 5757961 (1998-05-01), Yamakawa et al.
patent: 5828794 (1998-10-01), Katayama et al.
patent: 5933528 (1999-08-01), Katayama et al.
patent: 5937395 (1999-08-01), Iwamura
patent: 6088454 (2000-07-01), Nagashima et al.
patent: 6111994 (2000-08-01), Katayama et al.
patent: 6208735 (2001-03-01), Cox et al.
patent: 6232978 (2001-05-01), Ishida et al.
patent: 6282300 (2001-08-01), Bloom et al.
patent: 6373960 (2002-04-01), Conover et al.
patent: 6385329 (2002-05-01), Sharma et al.
patent: 6438252 (2002-08-01), Miller
patent: 6577745 (2003-06-01), Op De Beeck et al.
patent: 6614914 (2003-09-01), Rhoads et al.
“Digital Halftoning Technique Using a Blue-Noise Mask”, Theopano Mitsa and Kevin J. Parker, J. Opt, Soc. Am. A/vol. 9, No. 11, Nov. 1992.

Affiliated with

Also associated with

Rating

Image processor and image processing method 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 processor and image processing method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Image processor and image processing method will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3441701