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Ȩ Ȩ > ¿¬±¸¹®Çå > ±¹³» ³í¹®Áö > Çѱ¹Á¤º¸Ã³¸®ÇÐȸ ³í¹®Áö > Á¤º¸Ã³¸®ÇÐȸ ³í¹®Áö B

Á¤º¸Ã³¸®ÇÐȸ ³í¹®Áö B

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ÇѱÛÁ¦¸ñ(Korean Title) °¡¿ª ¿öÅ͸¶Å· ±â¼úÀ» ÅëÇÑ JPEG ¾ÐÃà ¿µ»óÀÇ ¹«°á¼º ÀÎÁõ ¾Ë°í¸®Áò
¿µ¹®Á¦¸ñ(English Title) Integrity Authentication Algorithm of JPEG Compressed Images through Reversible Watermarking
ÀúÀÚ(Author) Á¶Çö¿ì   ¿©µ¿±Ô   ÀÌÇØ¿¬   Hyun-Wu Jo   Dong-Gyu Yeo   Hae-Yeoun Lee  
¿ø¹®¼ö·Ïó(Citation) VOL 19-B NO. 02 PP. 0083 ~ 0092 (2012. 04)
Çѱ۳»¿ë
(Korean Abstract)
¸ÖƼ¹Ìµð¾î ÄÜÅÙÃ÷´Â µðÁöÅÐ µ¥ÀÌÅÍÀÇ Æ¯¼º»ó ¼öÁ¤°ú º¹Á¦°¡ ½±°í, ÀÌ¿¡ µû¶ó ºÒ¹ý À¯Åë°ú À§¡¤º¯Á¶ µîÀÇ ¹®Á¦°¡ ¹ß»ýÇÒ ¼ö ÀÖ´Ù. ÃÖ±Ù ¿©·¯ ºÐ¾ß¿¡¼­ ¸ÖƼ¹Ìµð¾î ÄÜÅÙÃ÷ º¸¾ÈÀÇ Á߿伺ÀÌ ³ô¾ÆÁö°í ÀÖ°í, ÀÌ·¯ÇÑ ±â¼úÀû ¿ä±¸¿¡ ¸ÂÃß¾î ´Ù¾çÇÑ ¸ÖƼ¹Ìµð¾î ÄÜÅÙÃ÷ º¸¾È ±â¼úÀÌ ¿¬±¸µÇ°í ÀÖ´Ù. º» ³í¹®¿¡¼­´Â JPEG ¾ÐÃà Ç¥ÁØ¿¡¼­ »ç¿ëÇÒ ¼ö ÀÖ´Â °¡¿ª ¿öÅ͸¶Å· ¹× ÄÜÅÙÃ÷ ÀÎÁõ ¾Ë°í¸®ÁòÀ» Á¦¾ÈÇÑ´Ù. ¿µ»óÀÇ »ùÇà ºí·ÏÀ» ÀÌ¿ëÇÏ¿© Ư¡ÀûÀÎ ÀÎÁõ Äڵ带 »ý¼ºÇÏ°í, JPEG ¾ÐÃà °úÁ¤ Áß ºñ¼Õ½Ç °úÁ¤¿¡¼­ º¸Á¸µÇ´Â µ¥ÀÌÅ͸¦ ÀÌ¿ëÇØ È÷½ºÅä±×·¥ ½¬ÇÁÆà ±â¹ýÀ» ÀÌ¿ëÇÏ¿© ÀÎÁõ Äڵ带 »ðÀÔÇÑ´Ù. µðÄÚµù °úÁ¤¿¡¼­ ¿µ»ó ÀÎÁõ°ú µ¿½Ã¿¡ Ç°ÁúÀ» º¹¿øÇÑ´Ù. Á¦¾È ¾Ë°í¸®ÁòÀÇ ¼º´É Æò°¡¸¦ À§ÇØ ´Ù¾çÇÑ ¿µ»óÀ» ´ë»óÀ¸·Î Ç°Áú°ú ¾ÐÃà·üÀ» Æò°¡ÇÏ¿´´Ù. »ðÀÔµÈ ¿µ»óÀÇ PSNR°ú ¾ÐÃà·üÀº °¢°¢ 33.13dB°ú 90.65%·Î, Ç¥ÁØ ÀÎÄÚµù ¿µ»ó ´ëºñ 2.44dBÀÇ PSNR Â÷ÀÌ¿Í 1.63%ÀÇ ¾ÐÃà·ü Â÷À̸¦ º¸¿´´Ù.
¿µ¹®³»¿ë
(English Abstract)
Multimedia contents can be copied and manipulated without quality degradation. Therefore, they are vulnerable to digital forgery and illegal distribution. In these days, with increasing the importance of multimedia security, various multimedia security techniques are studied. In this paper, we propose a content authentication algorithm based on reversible watermarking which supports JPEG compression commonly used for multimedia contents. After splitting image blocks, a specific authentication code for each block is extracted and embedded into the quantized coefficients on JPEG compression which are preserved against lossy processing. At a decoding process, the watermarked JPEG image is authenticated by extracting the embedded code and restored to have the original image quality. To evaluate the performance of the proposed algorithm, we analyzed image quality and compression ratio on various test images. The average PSNR value and compression ratio of the watermarked JPEG image were 33.13dB and 90.65%, respectively, whose difference with the standard JPEG compression were 2.44dB and 1.63%.
Å°¿öµå(Keyword) ¹«°á¼º ÀÎÁõ   °¡¿ª ¿öÅ͸¶Å·   JPEG   È÷½ºÅä±×·¥ ½¬ÇÁÆà  Integrity Authentication   Reversible Watermarking   Histogram Shifting  
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