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Ȩ Ȩ > ¿¬±¸¹®Çå > ±¹³» ³í¹®Áö > Çѱ¹Á¤º¸°úÇÐȸ ³í¹®Áö > Á¤º¸°úÇÐȸ ³í¹®Áö C : ÄÄÇ»ÆÃÀÇ ½ÇÁ¦

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ÇѱÛÁ¦¸ñ(Korean Title) ½Ã¾ß°¢À¸·Î ÇÑÁ¤µÈ ÃÖ±ÙÁ¢ ÁúÀÇ
¿µ¹®Á¦¸ñ(English Title) View Field Nearest Neighbor Queries
ÀúÀÚ(Author) À̼º¹Î   Á¤¿¬µ·   ¹ÚÁØÇ¥   Á¤Çϸ²   Sungmin Yi   Yon Dohn Chung   Jun Pyo Park   HaRim Jung  
¿ø¹®¼ö·Ïó(Citation) VOL 18 NO. 01 PP. 0075 ~ 0079 (2012. 01)
Çѱ۳»¿ë
(Korean Abstract)
ÃÖ±Ù ¸¹Àº °ü½ÉÀ» ¹Þ°í ÀÖ´Â Áõ°­Çö½Ç À§Ä¡±â¹Ý ¼­ºñ½º¿Í °°ÀÌ »ç¿ëÀÚÀÇ ÇÑÁ¤µÈ ½Ã¾ß°¢ÀÌ Á¸ÀçÇÏ´Â »óȲ¿¡¼­ »ç¿ëÀÚ°¡ ¿øÇÏ´Â µ¥ÀÌÅ͸¦ È¿°úÀûÀ¸·Î Á¦°øÇϱâ À§ÇÏ¿© º» ³í¹®¿¡¼­´Â »õ·Î¿î À§Ä¡±â¹Ý ÁúÀÇÀÎ ½Ã¾ß ÃÖ±ÙÁ¢ ÁúÀÇ (VFNN: View Field Nearest Neighbor Query)¸¦ ¼Ò°³ÇÑ´Ù. VFNN ÁúÀÇ´Â »ç¿ëÀÚÀÇ ½Ã¾ß°¢ ¶Ç´Â ÇÑÁ¤µÈ °¢³»¿¡ À§Ä¡ÇÏ´Â °¡Àå °¡±î¿î µ¥ÀÌÅ͸¦ °Ë»öÇÑ´Ù. º» ³í¹®¿¡¼­ Á¦¾ÈÇÏ´Â VFNN ÁúÀÇ Ã³¸® ¾Ë°í¸®ÁòÀº °¡Àå ³Î¸® È°¿ëµÇ°í ÀÖ´Â °ø°£ µ¥ÀÌÅÍ »öÀÎ ±¸Á¶ÀÎ R*-tree¸¦ »ç¿ëÇÑ´Ù. ƯÈ÷, ÁúÀÇ Á¡°ú MBR »çÀÌÀÇ ÃּҰŸ®ÀÎ MINDIST»Ó¸¸ ¾Æ´Ï¶ó, ÁúÀÇ Á¡°ú MBR »çÀÌÀÇ ÃÖ´ë °¢, ÃÖ¼Ò °¢À» Á¤ÀÇÇÑ´Ù. À̸¦ È°¿ëÇÏ¿© R*-tree Ž»ö ½Ã ÁúÀÇ °á°ú °ªÀ» Æ÷ÇÔÇÏÁö ¾Ê´Â ³ëµåµéÀ» ¿¬»ê¿¡¼­ Á¦¿ÜÇÏ¿© ÁúÀÇ Ã³¸®ÀÇ È¿À²¼ºÀ» Çâ»ó½ÃŲ´Ù. ¸¶Áö¸·À¸·Î ½ÇÇèÀ» ÅëÇÏ¿© VFNN ÁúÀÇ Ã³¸® ¾Ë°í¸®ÁòÀÇ ¼º´ÉÀ» Æò°¡ÇÑ´Ù.
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(English Abstract)
In many location based services with augmented reality, it is critical to provide valuable data to users of diverse interests based on their locations as well as their view-fields. This paper introduces a novel type of spatial queries, which we call the View Field Nearest Neighbor (VFNN) query. Given a user's view-field, VFNN finds the nearest data object that falls within the users' view-field. In this paper, we utilize the R*-tree, one of the most representative index structures, to index spatial data objects and search VFNN in an efficient manner. In particular, we employ (i) MINDIST to compute the minimum possible distance from a query point (i.e., user's location) to each data object and (ii) min_angle (max_angle), which is the starting (ending) angle in the user's view-field boundary, for pruning unnecessary search paths in the R*-tree. Finally, we conduct the simulation experiments to investigate the performance of the proposed VFNN search algorithm.

Å°¿öµå(Keyword) À§Ä¡±â¹Ý ¼­ºñ½º   °ø°£ µ¥ÀÌÅÍ   ÃÖ±ÙÁ¢ ÁúÀÇ   Áõ°­Çö½Ç   Location-based service   Spatial data   Nearest neighbor queries   Augmented reality  
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