(12) Umted States Patent (10) Patent No.: US 8,160,294 B2 Takahashi et al. (45) Date of Patent: Apr. 17, 2012 (54) ELECTRONIC WATERMARK EMBEDMENT 7,532,738 B2: 5/2009 Hashimoto et al. ......... .. 382/100 1 WATERMARK DETECTION APPARATUS 2001/0017709 A1* 8/2001 Murakami 'e1;11'."I :0 358/1.14 2002/0002679 A1* 1/2002 Murakamiet al. 713/176 (75) Inventors: Jun Takahashi, Kawasaki (JP); 2002/0090111 A1* 7/2002 Fukushima et al. ........ .. 382/ 100 Kensuke Kuraki, Kawasaki (JP); Taizo 2002; 0105839 AI 8;2002 Sugahim <1» 528111822 :1 1128 _ __ _ _ _ 2004/0101160 A1* 5/2004 Kunisa ........................ .. 382/100 (73) Asslgneei Flliltsll Llmlted, Kawasakl (JP) 2005/0063562 A1* 3/2005 BI'|.1I1l( et 11. 382/100 2005/0154892 A1* 7/2005 Mihcak et al. . 713/176 ( * ) Notice: Subject to any disclaimer, the term ofthis 2005/0190948 A1* 9/2005 Isogai ....... .. 382/100 patent is extended or adjusted under 35 2005;0207615 A1: 9;2005 S:11(°h_ ~~~~ ~' 382//100 U.S.C. 1540010 1020101 5333,3588: Q} 15533; ~~~~~~~~~~~~~~~~~~~~~~~ ~~ 2007/0201719 A1* 8/2007 Hashimoto et al. ......... .. 382/100 (21) Appl.No.: 11/862,592 FOREIGN PATENT DOCUMENTS (22) Filedl 5611- 271 2007 CN 1635533 A 7/2005 C ' d (65) Prior Publication Data ( Ommue ) US 2008/0080738 A1 Apr. 3, 2008 OTHER PUBLICATIONS _ _ _ _ _ Japanese Office Action issued Aug. 30, 2011 in corresponding Japa(30) Forelgn APPIIcatI0n Pnonty Data nese Patent Application 2006-266015. Sep. 28, 2006 (JP) ............................... .. 2006-266015 (Continued) (51) Int. Cl. Primary Examiner * Jason M Repko G06K 9/00 (2006.01) Assistant Examiner * Shervin Nakhjavan (52) U.S. Cl. ..................................................... .. 382/100 (74) Attorney, Agent, or Firm * Staas & Halsey LLP (58) Field of Classification Search ................ .. 382/100, 382/181, 190, 195; 713/168, 170, 176, 179, (57) ABSTRACT _ _ 713/ I80; 358/3287313; 380/258 A figure pattern expressing information to be embedded, or a See apphcanon file for Complete Search h1StOry~ position of an area in which the information to be embedded _ exists, is embedded in an area other than the background of (56) References Cited
image data, thereby generating image data embedded with a watermark. Then, the figure pattern is detected from the generated image data embedded with the watermark, and embed
615261I55 BI * 2/2003 Wang et a1~ ~~~~~~~~~~~~~~~~~ ~~ 382/I00 ded information expressed by the detected figure pattern or * égglashita et al 358/1 18 embedded information existing in an area at a position 639833056 B1 11 1/2006 Amano “““““ 382/1'00 expressed by the detected figure pattern is detected. 7,006,257 B1* 2/2006 Yamazaki et al. 358/3.28 7,411,702 B2 * 8/2008 Eguchi et al. .............. .. 358/3.28 13 Claims, 29 Drawing Sheets 1 1 1 1 12 1 1 3 IMAGE DATA EIIIBEDDING INFORMATION FIGURE PATTERN ‘ I E " 101 DETECTION DEVECE / " 102 EMBEDMENT DEVICE / " 111 WATERMARK EMBEDDED f IMAGE DATA
