Acta Optica Sinica, Volume. 41, Issue 11, 1112002(2021)

Metal Surface Texture Reconstruction Based on Near-Field Photometric Stereo

Zhenxiong Jian, Xi Wang, Jieji Ren, and Mingjun Ren*
Author Affiliations
  • School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
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    The surface quality of precision metal parts will affect the performance and appearance of the product. For this reason, it is necessary to measure and evaluate the surface texture of the parts. Commonly used contact measurement methods have low measurement efficiency, and optical measurement methods are susceptible to the effects of surface highlight reflection. For this reason, a method based on near-field non-Lambertian photometric stereo vision for highlight metal surface texture reconstruction is proposed. In order to effectively describe the non-Lambertian reflection, this method uses an inverse reflectance model based on an inverse reflectance light source to decouple the surface normal vector and the nonlinear reflection model. This method uses neighborhood information to improve the robustness of the inverse model, and uses the maximum fusion strategy to overcome the influence of shadows and rendering generates targeted simulation datasets, thereby improving the adaptability to metal surface reflection. The results show that the proposed method can reconstruct the high-brightness metal surface texture with high precision, and the relative measurement error is less than 15%.

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    Zhenxiong Jian, Xi Wang, Jieji Ren, Mingjun Ren. Metal Surface Texture Reconstruction Based on Near-Field Photometric Stereo[J]. Acta Optica Sinica, 2021, 41(11): 1112002

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    Paper Information

    Category: Instrumentation, Measurement and Metrology

    Received: Nov. 11, 2020

    Accepted: Jan. 8, 2021

    Published Online: Jun. 7, 2021

    The Author Email: Ren Mingjun (renmj@sjtu.edu.com)

    DOI:10.3788/AOS202141.1112002

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