Digital video camera recently has become a popular monitoring tool because of its low cost and relatively high resolution. Comparing with the photogrammetric photos, digital video camera is difficult to locate the target position in the video image. In this study, we integrate the digital video camera, the digital compass and GPS (Global Positioning System) during the recording process. The frames of video have high correlation, so they can be used to track the object and image coordinate of the object’s center in the video images. Using the frame number, GPS and orientation data, we can find the interior orientation of the frame. Then using least squares adjustment, we can calculate the position of the object quickly. An experiment is performed to locate the ship’s positioning in the open sea ; the result shows that the proposed method can locate the target’s position successfully without the ground control points.
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