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How to transfer GPS heights into normal heights has become a hotspot in survey engineering. There are many GIS fitting methods adopted in GPS heights conversion. A solution is sought the points where collocated by GPS (getting h) and geometry leveling (getting H) in certain area, and we could get the values of Quasi-geoid of these points. We call these points GPS/leveling points, namely the known...
Three-dimensional (3D) reconstruction considering of image sequences is an unresolved and active research topic on the cross-section of computer vision and digital photogrammetry. In this paper, we focus on 3D object shape reconstruction from uncalibrated images and put forward a rapid algorithm to recover the object height. The recovering 3D shape comprises two steps, for the one hand, calculate...
GPS height conversion into normal heights has become a hotspot in survey engineering. Many Researches and applications have proved that the Quasi-geoid surface can be very complicated especially in a large survey area or in complicated terrain, just adopting several GPS/leveling points to construct quadric surface model to fit the Quasi-geoid surface has some limitations, precision could not be guaranteed...
3D reconstruction from uncalibrated image sequences is very important technology in computer vision. However, we only get 3D point cloud reconstructed from the image sequence, so the paper puts forward a kind of 3D reconstruction method considering of image sequences combined with 3D models taking advantages of parallel lines and vertical lines in features extracting. The experiment shows that the...
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