1A2-C25 係留気球搭載カメラによる全方位鳥瞰画像システムに関する研究

概要

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A captive balloon system named InfoBalloon has been developed as a system for collecting and distributing disaster information. In this report, an effective use of multidirectional images by a pan-tilt camera mounted on InfoBalloon is discussed. Captured images should be integrated into an omni-directional image. However, view direction of the camera changes in the wind, so specified pan-tilt value to the camera cannot be used for image integration. Each image is pasted on a virtual sphere screen based on quaternion of positional interrelation derived by Scale-Invariant Feature Transform (SIFT) without using specified pan-tilt value to the camera. Finally, an omni-directional image is generated from the virtual sphere that images are pasted. Moreover, we also propose omni-directional image showing system that enables users to see the image in a sense near the viewpoint of the camera.