2021/07/31 by Cong Liu, Chuang Zhang, Liu, Cong +7
Computer Science · Engineering · #Advanced Measurement and Metrology Techniques #FOS: Electrical engineering #Image Processing Techniques and Applications #Image and Video Processing (eess.IV) #Optical measurement and interference techniques #electronic engineering #information engineering
paper · pdf · doi:10.48550/arxiv.2108.00129
openalex publication_date 2021/07/31 · openalex created_date 2021/08/16 · openalex updated_date 2026/07/28
In fringe projection profilometry, the high-order harmonics information of non-sinusoidal fringes will lead to errors in the phase estimation. In order to solve this problem, a point-wise posterior phase estimation (PWPPE) method based on deep learning technique is proposed in this paper. The complex nonlinear mapping relationship between the multiple gray values and the sine / cosine value of the phase is constructed by using the feedforward neural network model. After the model training, it can estimate the phase values of each pixel location, and the accuracy is higher than the point-wise least-square (PWLS) method. To further verify the effectiveness of this method, a face mask is measured, the traditional PWLS method and the proposed PWPPE method are employed, respectively. The comparison results show that the traditional method is with periodic phase errors, while the proposed PWPPE method can effectively eliminate such phase errors caused by non-sinusoidal fringes.