Phase compensation method based on three-dimensional measurement of binary fringe
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1.College of Automation, Nanjing University of Information Science and Technology,Nanjing 210044, China;2.Jiangsu Provincial Collaborative Innovation Center for Atmospheric Environment and Equipment Technology,Nanjing 210044, China; 3.Jiangsu Province Engineering Research Center of Intelligent Meteorological Exploration Robot,Nanjing 210044, China

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TP391

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    Abstract:

    Rapid 3D measurement has been widely used in industrial testing and reverse engineering. In this paper, a 3D measurement method based on binary fringe phase solution is proposed. Firstly, by projecting a binary fringe image, the image carrying the phase information of the object is divided into two fringe masks by utilizing the fringe order distribution characteristics, and the white pixels are marked by steps using the connected domain, so as to obtain the fringe order. Secondly, due to the interference factors such as environmental noise, hopping error occurs during unwrapping phase. Therefore, a method is proposed to compensate the phase by integrating the half-periodic displacement order, and the complementary order of the half-periodic dislocation is obtained by using the binary fringe of unwrapping phase. Finally, the phase unwrapped are verified experimentally according to fringe order and complementary order. Experimental results show that the proposed method solves the burr problem in the phase unwrapping process. Taking the flat plate as the measurement object, the root-mean-square error measured by the proposed method is 0.198 0 mm, and only one image is needed to complete the phase unwrapping. The proposed method has good robustness and effectiveness, and can be applied to the field of rapid measurement.

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  • Received:
  • Revised:
  • Adopted:
  • Online: March 04,2024
  • Published: