A Study on the Adaptive Noise Filter to Fringe Projection Profilometry
| Autor: | Chao-Dong Chang, 張朝棟 |
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| Rok vydání: | 2016 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 104 3D modeling technology is widely used in decades, the applications including the most popular 3D printing that prints out the object scanned by a 3D scanner. This research work employs the fringe projection techniques to construct the 3D model. The fringe projection technique has the advantages of non-contact measurement to avoid touching objects that may damage the objects and fast operation time. However the fringe image may have random distributed granular spots (noise). This research work tries to reduce the noise caused by the fringe projection techniques when constructing a 3D object. First, this research uses a median filter to filter out some noises, which can preserve the characteristics of the phase wrapped map before the procedure of phase unwrapping. To eliminate the noise further, after phase unwrapping we apply our proposed logarithmic spiral algorithm to the unwrapped figure. Our approach can make the reconstructed 3D figure much better than that reconstructed by other approaches. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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