The camera movement can cause considerable error in the computer vision-based displacement measurement because the camera is generally placed far from the region of interest. The camera movement, which is difficult to avoid particularly in the long-term measurement, hinders real-world applications of the computer vision-based displacement method. This research proposes a practical means of long-term displacement measurement by using a novel camera system. In addition to the conventional camera-based measurement, an auxiliary camera is used to compensate the camera motion-induced error. Experimental validation is conducted in the laboratory environment.

• 이준화(울산과학기술원 도시환경공학부) | Lee Junhwa
• 이경찬(철도기술연구원 첨단궤도토목본부) | Lee Kyoung-Chan
• 이영주(울산과학기술원 도시환경공학부) | Lee Young-joo
• 심성한(울산과학기술원 도시환경공학부) | Sim Sung-Han