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Ȩ Ȩ > ¿¬±¸¹®Çå > ±¹³» ³í¹®Áö > Çѱ¹Á¤º¸Åë½ÅÇÐȸ ³í¹®Áö (Journal of the Korea Institute of Information and Communication Engineering)

Çѱ¹Á¤º¸Åë½ÅÇÐȸ ³í¹®Áö (Journal of the Korea Institute of Information and Communication Engineering)

Current Result Document :

ÇѱÛÁ¦¸ñ(Korean Title) ¿µ»óÀ¯Ã¼º¸Á¸½Ä°ú ÇÔ¼öÀü°³¹ý¿¡ ÀÇÇÑ ½ÉÀ念»óÀÇ ±¤·ù
¿µ¹®Á¦¸ñ(English Title) Optical flow of heart images by image-flow conservation equation ¶§d functional expansion
ÀúÀÚ(Author) ±èÁø¿ì   Jin-Woo Kim  
¿ø¹®¼ö·Ïó(Citation) VOL 11 NO. 07 PP. 1341 ~ 1347 (2007. 07)
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(Korean Abstract)
±âÁ¸ÀÇ ±¤·ù(Optical flow)´Â ±¹¼ÒÀû 󸮸¦ ½ÃÀÛÁ¡À¸·Î ÇÏ´Â bottom-up¼ö¹ý¿¡ ÀÇÇؼ­ ±¸ÇÏ¿´´Ù. ÀÌ¿¡ ¹ÝÇØ, º» ³í¹®Àº ¿µ»óÀ¯Ã¼º¸Á¸½Ä°ú ÇÔ¼öÀü°³¹ý¿¡ ÀÇÇØ ¿µ»ó ÀüüÀÇ ¿òÁ÷ÀÓÀ» Â÷¼ö°¡ ³·Àº ¸ðµå·Î ºÎÅÍ ¼øÂ÷ÀûÀ¸·Î Àü°³ÇÏ´Â bottom-down¼ö¹ýÀ» »õ·Î¿î ¼ö¹ýÀ¸·Î Á¦¾ÈÇÑ´Ù. ÀÇ·á ¿µ»ó¿¡ À־ ¸íµµ´Â ¿òÁ÷ÀÓÀÌ À־ ºÒº¯À¸·Î À¯ÁöÇÏ·Á´Â °æ¿ì°¡ ¸¹´Ù. ±×·¯³ª ÀÌ °°Àº ¿µ»ó°è¿­¿¡¼­ÀÇ ¿òÁ÷ÀÓÀº ÁÂÇ¥º¯È¯¿¡ ÀÇÇؼ­ ´ëÀÀµÈ´Ù. º» ¼ö¹ýÀÇ °æ¿ì ±¤·ù´Â ¼±Çü¸ð¸àÆ®¹æÁ¤½ÄÀÇ ÇÔ¼ö¿¡ °üÇÑ µµÇÔ¼ö¸¦ ÀÌ¿ëÇÏ´Â Åõ¿µ¹ý¿¡ ÀÇÇؼ­ ¹Ýº¹°è»êÀ¸·Î ±¸ÇÏ¿© Áø´Ù. º» ³í¹®¿¡¼­´Â ½ÉÀåÀÇ ¿µ»ó°è¿­À» ÀÌ¿ëÇÏ¿© ±âÁ¸ÀÇ Horn and Schunck±â¹ý, Standard multigrid±â¹ý°ú º» ¼ö¹ýÀÇ ¾Ë°í¸®ÁòÀ» ºñ±³ Æò°¡ÇÏ¿© À¯È¿¼ºÀ» ³ªÅ¸³½´Ù.
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(English Abstract)
The displacement field (Optical flow) has been calculated by bottom-up approaches based on local processing. In contrast with them, in this paper, a top-down approach based on expanding in turn from the lowest order mode the whole motion in an image pair of sequential images is proposed.
The intensity of medical images usually represents a quantity which is conserved during the motion. Hence sequential images are ideally related by a coordinate transformation. The displacement field can be determined from the generalized moments of the two images. The equations which transform arbitrary generalized moments from a source image to a target image are expressed as a function of the displacement field. The apparent displacement field is then computed iteratively by a projection method which utilizes the functional derivatives of the linearized moment equations. This method is demonstrated using a pair of sequential heart images. For comparative evaluation, we applied Horn and Schunck's method, a standard multigrid method£¬ and our proposed algorithm to sequential image.
Å°¿öµå(Keyword) Motion image   Optical flow   Medical image   Moment transfor  
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