• Infrared and Laser Engineering
  • Vol. 44, Issue 9, 2825 (2015)
He Fan, Bai Jian, and Hou Xiyun
Author Affiliations
  • [in Chinese]
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    DOI: Cite this Article
    He Fan, Bai Jian, Hou Xiyun. Calibration method for angular measurement of Moiré patterns based on template matching[J]. Infrared and Laser Engineering, 2015, 44(9): 2825 Copy Citation Text show less

    Abstract

    A high-accuracy calibration method for angular measurement of deformed and curved Moiré patterns, based on template matching algorithm, was presented. It was feasible and accurate method, based on Talbot interferometry and Moiré deflectometry, to measure long focal-length lenses. Theoretical analysis indicated that the precision of this method was mainly influenced by the angle of Moiré patterns. However, it was difficult to obtain high-accuracy angle of Moiré patterns, since the Moiré patterns derived from experiment were constantly deformed or curved. A method based on template matching algorithm, was demontrated to calibrate deformed and curved Moiré patterns, thus their angle can be calculated fast and accurately in sub-pixel domain. Numerical analysis and simulation prove that the method mentioned above demonstrates high precision and stability, and experiment results show that the accuracy of the long focal lengths measurement is improved obviously.
    He Fan, Bai Jian, Hou Xiyun. Calibration method for angular measurement of Moiré patterns based on template matching[J]. Infrared and Laser Engineering, 2015, 44(9): 2825
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