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Current Result Document : 2 / 3

ÇѱÛÁ¦¸ñ(Korean Title) ¿þÀÌºí¸´ Æò¸é¿¡¼­ÀÇ 2D-EMD¸¦ ÀÌ¿ëÇÑ µðÁöÅÐ ¿µ»óÀÇ ºí¶óÀÎµå ¿öÅ͸¶Å· ±â¼ú¿¡ °üÇÑ ¿¬±¸
¿µ¹®Á¦¸ñ(English Title) A Study on Blind Watermarking Technique of Digital Image using 2-Dimensional Empirical Mode Decomposition in Wavelet Domain
ÀúÀÚ(Author) ÀÌ¿µ¼®   ±èÁ¾¿ø   Youngseock Lee   Jongweon Kim  
¿ø¹®¼ö·Ïó(Citation) VOL 11 NO. 02 PP. 0099 ~ 0107 (2010. 04)
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(Korean Abstract)
º» ¿¬±¸¿¡¼­´Â µðÁöÅÐ ¿µ»óÀÇ ºí¶óÀÎµå ¿öÅ͸¶Å· ¾Ë°í¸®ÁòÀ» Á¦¾ÈÇÏ¿´´Ù. Á¦¾ÈÇÑ ¾Ë°í¸®ÁòÀº ¿þÀÌºí¸´ Æò¸é¿¡¼­ 󸮵Ǵ º¯È¯ Æò¸é ¿öÅ͸¶Å· ¾Ë°í¸®ÁòÀ¸·Î¼­ 2Â÷¿ø EMDÀ» ÀÌ¿ëÇÏ¿© ºÐÇØµÈ ¿öÅ͸¶Å©ÀÇ EMF ¼ººÐµéÀÌ ¿þÀÌºí¸´ ´ë¿ª¿¡ »ðÀԵǾî, °¢ ¿þÀÌºí¸´ ´ë¿ªÀº ¿öÅ͸¶Å©ÀÇ ÀϺΠÁ¤º¸¸¸À» Æ÷ÇÔÇÏ°í ÀÖ´Â °ÍÀ» Ư¡À¸·Î ÇÏ°í ÀÖ´Ù. ¿öÅ͸¶Å©ÀÇ ÃßÃâÀº °¢ ¿þÀÌºí¸´ ´ë¿ª¿¡¼­ ÃßÃâÇÑ ¿öÅ͸¶Å©ÀÇ ÀϺΠÁ¤º¸µéÀ» 2Â÷¿ø EMDÀÇ ¼±ÇüÀûÀΠƯ¡¿¡ ÀÇÇØ »ê¼úÀû ¶Ç´Â ³í¸®Àû ¿¬»êÀ» ÅëÇÏ¿© ȸº¹ÇÒ ¼ö ÀÖµµ·Ï ÇÏ¿´´Ù. °³¹ßÇÑ ¿öÅ͸¶Å· ¾Ë°í¸®ÁòÀº ºñ°¡½Ã¼º, °­Àμº µî ¿öÅ͸¶Å· ¾Ë°í¸®Áò¿¡¼­ ¿ä±¸µÇ´Â Á¶°Çµé¿¡ ´ëÇÑ ½ÇÇèÀ» ¼öÇàÇÏ¿© ¼º´ÉÀ» ºñ±³ ºÐ¼®ÇÏ¿´´Ù.
¿µ¹®³»¿ë
(English Abstract)
In this paper a blind watermarking algorithm for digital image is presented. The proposed method operates in wavelet domain. The watermark is decomposed into 2D-IMFs using BEMD which is the 2-dimensional extension of 1 dimensional empirical mode decomposition. The CDMA based on SS technique is applied to watermark embedding and detection process. In the watermark embedding process, each IMF of watermark is embedded into middle frequency subimages in wavelet domain, so subimages just include partial information about embedded watermark. By characteristics of BEMD, when the partial information of watermark is synthesized, the original watermark is reconstructed. The experimental results show that the proposed watermarking algorithm is imperceptible and moreover is robust against JPEG compression, common image processing distortions.
Å°¿öµå(Keyword) CDMA   BEMD   Blind watermarking   Wavelet domain  
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