Study on Precision Improvement of Ship’s Position Measurement Using Multiple Cameras
Kotaro Yoshihara, Shigehiro Yamamoto, Takeshi Hashimoto · Marine Engineering · 2019
The authors have been considering a lookout support system using cameras at a ship. In previous studies, a stereo imaging system was proposed to measure the locations of other ships. However, in the case of long-distance measurement, the previous results have often included a large margin of error due to slightly less accurate gaze detection for the target ship. This research paper describes our effort to improve the accuracy of long-distance position measurement by using a three-camera stereo vision system. Our experimental results show that errors can be reduced when using three cameras compared with the outcome obtained with two cameras. However, they also indicate that a systematic error can be observed even from the results of three camera measurement depending on methods of computation. The authors have analyzed the cause of this error through a numerical simulation.