Vision-based AR registration technology is based on finding the known four-points in a camera image. However there are many obstacles and noises in sea environment such as wave, wake, sun-reflection, and so on. Moreover we have to use not only the camera image but also navigational information such as AIS or radar information. This paper describes the process of computer image processing and utilize of AIS information to estimate ship pose and which is to overlap the computer-generated navigational graphical information upon a display device on the bridge.

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