画像データによる3次元ベクトルの推定

概要

論文の詳細を見る
A Camera image has the excellent resolution comparable with human's sight. In an integrated navigation-bridge system, various information are supplied to bridge console. So, it would be helpful to replace the look-out by navigator's eye with the camera image. From the image, many navigational informations can be extracted quantitatively by the number of pixels, instead of eye-measurement. A CCD-camera is a quite useful device for such purposes. The authors made experimental studies to estimate ship's heading, using the theory of "vanishing point and three dimensional vector". Picking out two parallel components from target ship's photograph, a vanishing point is decided as the apparent intersection of parallels. Then, three dimensional vector m is calculated by following formula. m=1/√<a^2+b^2+f^2>{abf} where, a, b is x, y coordinates of vanishing point and f is the focal distance. The result of experiment shows average estimation error of ship's heading remains less than 10°and this method is feasible, provided if some improvements are made.
1997-03-25