THE INSTITUTE OF ELECTRONICS, INFORMATION AND COMMUNICATION ENGINEERS TECHNICAL REPORT OF IEICE. † † † † 630–0192 8916–5 E-mail: †{yuusu-n,kanbara,yokoya}@is.naist.jp , . , . , , , , , . , , . , LED , . , . , , , A Localization Method Using Retro-reflective Markers and an IR camera Yusuke NAKAZATO† , Masayuki KANBARA† , and Naokazu YOKOYA† † Nara Institute of Science and Technology 8916–5 Takayama,