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ÇѱÛÁ¦¸ñ(Korean Title) |
B-½ºÇÁ¶óÀÎ °î¼± ¸ðµ¨¸µ ¹× ¸Þ½Ã-½ºÆåÆ®·³ º¯È¯À» ÀÌ¿ëÇÑ ÇÁ¸°Æ®-½ºÄµ¿¡ °ÀÎÇÑ °î¼± ¿öÅ͸¶Å· |
¿µ¹®Á¦¸ñ(English Title) |
Print-Scan Resilient Curve Watermarking using B-Spline Curve Model and its 2D Mesh-Spectral Transform |
ÀúÀÚ(Author) |
±èÁö¿µ
ÀÌÇØ¿¬
ÀÓµ¿Çõ
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ÀÌÈï±Ô
Ji Young Kim
Haeyeoun Lee
Donghyuck Im
Seungjin Ryu
Jungho Choi
Heungkyu Lee
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¿ø¹®¼ö·Ïó(Citation) |
VOL 15-B NO. 04 PP. 0307 ~ 0314 (2008. 08) |
Çѱ۳»¿ë (Korean Abstract) |
º» ³í¹®¿¡¼´Â À̹ÌÁöÀÇ ¼±¿¡ ´ëÇÏ¿© ¿öÅ͸¶Å© Á¤º¸¸¦ »ðÀÔ ¹× ÃßÃâÇÏ´Â ±â¼úÀ» Á¦¾ÈÇÑ´Ù. ±âÁ¸ÀÇ ¿öÅ͸¶Å· ±â¼úÀÌ À̹ÌÁöÀÇ Çȼ¿ ¹à±â°ªÀ» ÀÌ¿ëÇÏ´Â °Í°ú ´Þ¸® Á¦¾ÈµÈ ¾Ë°í¸®ÁòÀº À̹ÌÁöÀÇ °î¼±µéÀ» B-½ºÇÁ¶óÀÎ °î¼±À¸·Î ¸ðµ¨ÈÇÏ¿© B-½ºÇÁ¶óÀÎ Á¦¾îÁ¡À» ÃßÃâÇÏ°í À̸¦ ÁÖÆļö ¿µ¿ªÀ¸·Î º¯È¯ÇÏ¿© ¿öÅ͸¶Å©¸¦ »ðÀÔÇÑ´Ù. Á¦¾îÁ¡¿¡ Delaunay »ï°¢È¸¦ Àû¿ëÇÏ¿© ¸Þ½Ã¸¦ »ý¼ºÇÏ°í, ¸Þ½Ã-½ºÆåÆ®·³ ºÐ¼®À» ÅëÇÏ¿© ÁÖÆļö ¿µ¿ªÀÇ ¸Þ½Ã-½ºÆåÆ®·³ °è¼ö¸¦ °è»êÇÑ´Ù. ¿öÅ͸¶Å©´Â ÀÌ °è¼öÀÇ Áß°£ ÁÖÆļö ¼ººÐ¿¡ ½ºÇÁ·¹µå ½ºÆåÆ®·³ ¹æ½ÄÀ¸·Î »ðÀÔÇÑ´Ù. ¿öÅ͸¶Å©°¡ »ðÀÔµÈ °è¼ö¸¦ ¸Þ½Ã-½ºÆåÆ®·³ ¿ªº¯È¯À» ÅëÇÏ¿© Á¦¾îÁ¡À» °è»êÇÏ°í À̸¦ ÅëÇÏ¿© ¿öÅ͸¶Å©°¡ »ðÀÔµÈ B-½ºÇÁ¶óÀÎ °î¼±À» À籸¼ºÇÒ ¼ö ÀÖ´Ù. »ðÀÔµÈ ¿öÅ͸¶Å©´Â ¿øº» ¼± À̹ÌÁö¸¦ »ç¿ëÇÏ¿© °ËÃâÀÌ ÀÌ·ç¾îÁø´Ù. ¸ÕÀú ´ë»ó ¼± À̹ÌÁö¸¦ B-½ºÇÁ¶óÀÎ ¸ðµ¨ÈÇÏ°í °î¼±ÀÇ ±¼°îÁ¡À» ÀÌ¿ëÇÏ¿© ¿øº» ¼± À̹ÌÁö¿Í µ¿±âȸ¦ ¼öÇàÇÑ´Ù. µ¿±âÈµÈ À̹ÌÁö¿¡¼ ¿öÅ͸¶Å© »ðÀÔ°úÁ¤°ú °°ÀÌ ¸Þ½Ã-½ºÆåÆ®·³ °è¼ö¸¦ ÃßÃâÇÏ°í ¿øº» ¸Þ½Ã-½ºÆåÆ®·³ °è¼ö¿ÍÀÇ Â÷ÀÌ°ªÀ» °è»êÇÏ¿© ¿öÅ͸¶Å©¸¦ ÃßÃâÇÑ´Ù. ¸¶Áö¸·À¸·Î ·£´ý ¿öÅ͸¶Å©¿Í ÃßÁ¤µÈ ¿öÅ͸¶Å©ÀÇ »ó°ü °è¼ö¸¦ °è»êÇÏ¿© »ðÀÔµÈ ¿öÅ͸¶Å©¸¦ È®ÀÎÇÒ ¼ö ÀÖ´Ù. ½ÇÇèÀ» ÅëÇÏ¿© Á¦¾ÈµÈ ¿öÅ͸¶Å· ¾Ë°í¸®ÁòÀÌ ±âÁ¸ ¾Ë°í¸®Áòº¸´Ù ±âÇÏÇÐÀû °ø°Ý°ú ÇÁ¸°Æ®-½ºÄµ °ø°Ý¿¡ °ÀÎÇÔÀ» º¸¿´´Ù. |
¿µ¹®³»¿ë (English Abstract) |
This paper presents a new robust watermarking method for curves that uses informed-detection. To embed watermarks, the presented algorithm parameterizes a curve using the B-spline model and acquires the control points of the B-spline model. For these control points, 2D mesh are created by applying Delaunay triangulation and then the mesh spectral analysis is performed to calculate the mesh spectral coefficients where watermark messages are embedded in a spread spectrum way. The watermarked coefficients are inversely transformed to the coordinates of the control points and the watermarked curve is reconstructed by calculating B-spline model with the control points. To detect the embedded watermark, we apply curve matching algorithm using inflection points of curve. After curve registration, we calculate the difference between the original and watermarked mesh spectral coefficients with the same process for embedding. By calculating correlation coefficients between the detected and candidate watermark, we decide which watermark was embedded. The experimental results prove the proposed scheme is more robust than previous watermarking schemes against print-scan process as well as geometrical distortions. |
Å°¿öµå(Keyword) |
°ÀÎÇÑ ¿öÅ͸¶Å·
B-½ºÇÁ¶óÀÎ °î¼±
¸Þ½Ã-½ºÆåÆ®·³ º¯È¯
ÇÁ¸°Æ®-½ºÄµ
±âÇÏÇÐÀû °ø°Ý
Robust watermarking
B-spline curve
mesh-spectral transform
print-scan
geometric attack
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