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ÇѱÛÁ¦¸ñ(Korean Title) |
ÇÏ´Ù¸¶µå µµ¸ÞÀο¡¼ÀÇ ¼Õ½Ç¾ÐÃà¿¡ °ÀÎÇÑ ¿öÅ͸¶Å· |
¿µ¹®Á¦¸ñ(English Title) |
Robust Watermarking against Lossy Compression in Hadamard Domain |
ÀúÀÚ(Author) |
ÃÖÇг²
±èÁ¾¿ø
ÀÌ´ö
ÃÖÁ¾¿í
Cui Xuenan
Kim Jongweon
Li De
Choi Jonguk
|
¿ø¹®¼ö·Ïó(Citation) |
VOL 08 NO. 03 PP. 0033 ~ 0043 (2007. 06) |
Çѱ۳»¿ë (Korean Abstract) |
º» ³í¹®¿¡¼´Â ÇÏ´Ù¸¶µå º¯È¯À» ÀÌ¿ëÇÏ¿© ¿öÅ͸¶Å© Á¤º¸¸¦ »ðÀÔ ¹× ÃßÃâÇÏ´Â ¼Õ½Ç¾ÐÃà¿¡ °ÀÎÇÑ ¿öÅ͸¶Å· ¹æ¹ýÀ» Á¦¾ÈÇÑ´Ù. ÇÏ´Ù¸¶µå Çà·ÄÀº 1°ú -1·Î ±¸¼ºµÈ Çà·ÄÀ̹ǷΠ°è»êÀÌ ºü¸£°í ¶ÇÇÑ ¿ªº¯È¯ÀÌ °¡´ÉÇÑ Çà·ÄÀ̹ǷΠ¿öÅ͸¶Å© ±¸Çö¿¡ »ç¿ë °¡´ÉÇÏ´Ù. ¿öÅ͸¶Å© »ðÀÔ°úÁ¤¿¡¼, ¿öÅ͸¶Å©´Â ÇÏ´Ù¸¶µå °è¼öÁßÀÇ Áß°£ ÁÖÆļö °è¼ö 10°³¸¦ ¼±ÅÃÇÏ¿© ¿öÅ͸¶Å© ÆÐÅÏÀ» ÀÌ¿ëÇÏ¿© »ðÀÔÇÏ¿´´Ù. ¿öÅ͸¶Å© ÃßÃâ°úÁ¤¿¡¼´Â, »ðÀÔ ½Ã »ç¿ëÇß´ø ¿öÅ͸¶Å© ÆÐÅÏÀ» ÀÌ¿ëÇÏ¿© ºñ±³ÇÏ´Â ¹æ¹ýÀ» »ç¿ëÇÏ¿© ¿öÅ͸¶Å© Á¤º¸¸¦ ÃßÃâÇÏ¿´´Ù. ½ÇÇè°á°ú, ÇÏ´Ù¸¶µå µµ¸ÞÀο¡¼ 40%ºñÆ®ÀÇ ÀÌÁø ·Î°í¿µ»óÀ» »ðÀÔÇÏ¿´À» ¶§ PSNR(Peok Signal To Noise Rate)ÀÌ »çÀÌ¿¡¼ BER(Bit Error Rate)ÀÌ ¿¡ ´ÞÇÏ´Â ¼º´ÉÀ» ³ªÅ¸³»¾ú°í JPEG ¾ÐÃà¿¡ ´ëÇؼ´Â QF(Quality Factor)°¡ 30¿¡¼ºÎÅÍ À°¾ÈÀ¸·Î ±¸ºÐÇÒ ¼ö ÀÖÀ» Á¤µµÀÇ ·Î°í¸¦ ÃßÃâÇØ ³¾ ¼ö ÀÖ¾ú´Ù. º» ³í¹®¿¡¼´Â ÇÏ´Ù¸¶µå µµ¸ÞÀο¡¼ÀÇ ¼º´ÉÀ» Áõ¸íÇϱâ À§ÇÏ¿© DCT, FFT, DWTµî°ú ºñ±³ÇÏ¿© ½ÇÇèÇÑ °á°ú Çϸ¶´Ùµå µµ¸ÞÀο¡¼ °¡Àå ÁÁÀº ¼º´ÉÀ» ³ªÅ¸³¿À» ¾Ë ¼ö ÀÖ¾ú´Ù. |
¿µ¹®³»¿ë (English Abstract) |
In this proper, we proposes a robust watermarking against the lossy compression in the Hadamard domain. The Hadamard matrix consists of only 1 or -1 and can be computed veru fast. The Hadamrd transform has the inverse transform therefore it is able to be applied into the watermarking technology. In embedding process, we select 10 coefficients from intermediate frequency domain and create two watermark patterns. In extraction process, we use the watermark patterns and compare them to detect the watermark information. When we use the standard image () and binary watermark image (), the results of these examines are PSNR for and BER for . The JPEG QF between 30 and100, naked human eyes can detect to watermark image easily. The experimental results show that performance of Hadamard domain is better than those of DCT, FFT, and DWT. |
Å°¿öµå(Keyword) |
Hadamard
reversible
watermarking
jpeg
shift
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ÆÄÀÏ÷ºÎ |
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