The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 27, 2010
Filed:
Apr. 22, 2004
Dong-hwan Shin, Seoul, KR;
Kyong-soon Kim, Kyunggi-do, KR;
Won-ha Lee, Seoul, KR;
Jong-uk Choi, Seoul, KR;
Dong-Hwan Shin, Seoul, KR;
Kyong-Soon Kim, Kyunggi-do, KR;
Won-Ha Lee, Seoul, KR;
Jong-Uk Choi, Seoul, KR;
Marktek Inc., Seoul, KR;
Markany Inc., Seoul, KR;
Abstract
The present invention relates to a method for embedding and detecting a watermark where a forgery/alternation of an image can be identified and the location of forgery/alternation can be verified by embedding and detecting a watermark into a digital image which is shot in real time. The watermark is generated by using a quantized coefficient after frequency transform used in the compression process. By embedding this into an image, the image can be compressed simultaneously with the embedded watermark. The present invention relates to a method for embedding a robust watermark which embeds a random sequence circular shifted from an original pseudo random sequence by the distance d as the watermark is embedded into an image, and a method for generating and embedding the watermark by using a DCT coefficient quantized during an MPEG compression process of the image.