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We have been developing the stereo-matching method and its system by digital photogrammetry using a digital camera to make 3D Measurement of various objects. We are also developing the technology to process 3D point clouds of enormous amount obtained through Terrestrial Laser Scanner (TLS). But this time, we have developed the technology to produce a Surface-Model by detecting the 3D edges on the stereo-images of 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 TLS, and thus succeeded to develop the new technology to fuse the 3D data of 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 complicated 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 the scanner to produce automatically the model of great perfection. In this presentation, therefore, we will 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 analysing process, which turned out to be quite satisfactory

the international archives of the photogrammetry, remote sensing and spatial information sciences/international archives of the photogrammetry, remote sensing and spatial information sciences

3D MODELING OF ARCHITECTURE BY EDGE-MATCHING AND INTEGRATING THE POINT CLOUDS OF LASER SCANNER AND THOSE OF DIGITAL CAMERA