Automatic one's own ship position corrector

Abstract

PURPOSE: To correct errors in the determination of one's own ship's position at a high accuracy, by performing an image processing of digital map and data of ratio wave type navigation. CONSTITUTION: A virtual chart radar generator section (A) receives inputs of chart images and rough one's own ship coordinates P by a radio wave type navigator or the like and a scanning is done centered on the coordinates P on the image to prepare a virtual chart radar image VC (XY) of a specified range of a coast line. A radar virtual radar image generator section A' receives inputs of an radar image and the coordinates P to prepare a radar virtual radar image VR (XY) of a coast line likewise. A 2-D correlation value of two virtual radar images thus prepared is calculated with a correlation value calculating section (B), which outputs the position maximizing the correlation value as X correction value and Y correction value. According to the correction values, the position of one's own ship is shown on a video display to perform an automatic correction continuously. COPYRIGHT: (C)1987,JPO&Japio

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Patent Citations (1)

    Publication numberPublication dateAssigneeTitle
    JP-S6093368-AMay 25, 1985Furuno Electric Co LtdShip position determining device

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Cited By (3)

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    GB-2452390-AMarch 04, 2009Furuno Electric CoRadar device including area determination module, noise-level calculation module and an interpolation module.
    GB-2452390-BOctober 05, 2011Furuno Electric CoRadar device
    US-7916069-B2March 29, 2011Furuno Electric Co., Ltd.Radar device