scholarly journals Computational optical distortion correction using a radial basis function-based mapping method

2012 ◽  
Vol 20 (14) ◽  
pp. 14906 ◽  
Author(s):  
Aaron Bauer ◽  
Sophie Vo ◽  
Keith Parkins ◽  
Francisco Rodriguez ◽  
Ozan Cakmakci ◽  
...  
Keyword(s):  
Radial Basis Function ◽  
Basis Function ◽  
Mapping Method ◽  
Distortion Correction ◽  
Optical Distortion ◽  
Radial Basis

scholarly journals Calibration Method of Orthogonally Splitting Imaging Pose Sensor Based on General Imaging Model

2018 ◽  
Vol 8 (8) ◽  
pp. 1399 ◽  
Author(s):  
Na Zhao ◽  
Changku Sun ◽  
Peng Wang
Keyword(s):  
Coordinate System ◽  
Radial Basis Function ◽  
Basis Function ◽  
Calibration Method ◽  
Calibration Procedure ◽  
Distortion Correction ◽  
Imaging Model ◽  
The World ◽  
Radial Basis ◽  
Pinhole Imaging

Orthogonally splitting imaging pose sensor is a new sensor with two orthogonal line array charge coupled devices (CCDs). Owing to its special structure, there are distortion correction and imaging model problems during the calibration procedure. This paper proposes a calibration method based on the general imaging model to solve these problems. The method introduces Plücker Coordinate to describe the mapping relation between the image coordinate system and the world coordinate system. This paper solves the mapping relation with radial basis function interpolation and adaptively selecting control points with Kmeans clustering method to improve the fitting accuracy. This paper determines the appropriate radial basis function and its shape parameter by experiments. And these parameters are used to calibrate the orthogonally splitting imaging pose sensor. According to the calibration result, the root mean square (RMS)of calibration dataset and the RMS of test dataset are 0.048 mm and 0.049 mm. A comparative experiment is conducted between the pinhole imaging model and the general imaging model. Experimental results show that the calibration method based on general imaging model applies to the orthogonally splitting imaging pose sensor. The calibration method requires only one image corresponding to the target in the world coordinates and distortion correction is not required to be taken into account. Compared with the calibration method based on the pinhole imaging model, the calibration procedure based on the general imaging model is easier and accuracy is greater.

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