Shepe from Shading with perspective projection and camera calibration
| Autor: | Clesio Luis Tozzi, Júlio Kiyoshi Hasegawa |
|---|---|
| Rok vydání: | 1996 |
| Předmět: |
Surface (mathematics)
business.industry Computation Orthographic projection ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION General Engineering System of linear equations Real image Computer Graphics and Computer-Aided Design Human-Computer Interaction Photogrammetry Photometric stereo Computer vision Artificial intelligence business ComputingMethodologies_COMPUTERGRAPHICS Camera resectioning Mathematics |
| Zdroj: | Computers & Graphics. 20:351-364 |
| ISSN: | 0097-8493 |
| Popis: | The majority of algorithms making use of the Shape from Shading technique to reconstruct a 3-D surface from its image employ the orthographic projection system which, in the case of real images, always causes deformation on the reconstructed surface. To remove this constraint a simultaneous procedure (Hybrid Model) is proposed which uses the Shape from Shading (SFS) technique combined with the photogrammetric technique and the perspective projection to reconstruct the surface and determine the camera calibration parameters. The procedure is based on an explicit mathematical model and an iterative process is adopted to solve the resulting system of equations. The Least Square Method (LSM) is adopted and the Taylor's Series Lianearization technique is applied due to the non-linearity of the model. The proposed procedure differs from the procedures found in the literature in that it adopts the simultaneous computation of the tridimensional coordinates for surface point and the camera calibration parameters while employing perspective projection. In addition to that, solving the resulting system of equations does not demand any restriction on the surface, as it happens in other related procedures. |
| Databáze: | OpenAIRE |
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