三次元エッジに基づく点群と画像の融合処理による三次元モデリングとその建築物への応用

概要

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The authors have developed a technology to produce a 3D surface model by detecting the 3D edges on the stereo-images of a digital camera. Then we arrived to register the 3D data obtained from the stereo-images and the 3D edge data detected on the 3D point-cloud of a Terrestrial Laser Scanner (TLS), and thus succeeded to develop the new technology to fuse the 3D data of the Camera and TLS. The basic idea is to take stereo-pictures by a digital camera around the areas where the scanner cannot, because of the occlusion. The camera, with the digital photogrammetry, can acquire the data of complicates and hidden areas instantly, thus shutting out the possibility of noises in a blink. The data of the camera are then integrated into the data of scanner to produce automatically the model of great perfection. In this paper, the authors show (1) how to detect the 3D edges on the photo images and to detect from the scanner's point cloud, (2) how to register the data of both 3D edges to produce the unified model, (3) how to assess the accuracy and the speed of analyzing process, which turned out to be quite satisfactory.