26 June 2017 Determining the beam directions for the laser illumination calibration
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Abstract
In the modern world optical sensor systems have a vast number of applications. In this research work the system composed of the two cameras and the laser illumination with the 49 lasers is considered. In the previous research work we proposed the general calibration technique for this system. It was shown that the most complicated subtask in this technique is determining the beam directions for the laser illumination calibration because it couldn’t be solved using the known algorithms. The main stages which are required to execute for determining the beam directions for the laser illumination are: tracking of the laser illumination points in the image sequence of the calibration object; calculation of the coordinates in space for the found laser illumination points; constructing the laser beams in space passing close as much as possible to the found points. Within the scope of the research carried out, all the main stages for determining the beam directions for the laser illumination are considered. But much attention in this work is devoted to the third stage. The origin of the laser beam is known since it coincides with the known location of the laser on the laser illumination. Thus the problem is to find the ray passing through the origin and the least divergent in mean square from the found set of points. Also the algorithms for performing each stage are suggested. Particularly, we developed our own algorithms taking into consideration specifics of the available system with the laser illumination, viz. the algorithms for detecting the laser illumination points, the algorithms for constructing the laser beam from the found set of points. The beam directions in space can be determined for each laser of the illumination. These determined directions can be used as the subset of the calibration parameters for the whole system.
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Victoria A. Sablina, Victoria A. Sablina, Anatoly I. Novikov, Anatoly I. Novikov, Michael B. Nikiforov, Michael B. Nikiforov, } "Determining the beam directions for the laser illumination calibration", Proc. SPIE 10332, Videometrics, Range Imaging, and Applications XIV, 1033206 (26 June 2017); doi: 10.1117/12.2270173; https://doi.org/10.1117/12.2270173
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