基于像素偏差查找表的条纹投影轮廓法跨介质三维形状测量折射误差补偿方法。

IF 3.3 2区 物理与天体物理 Q2 OPTICS
Optics letters Pub Date : 2025-10-01 DOI:10.1364/OL.572424
Chao Chen, Xukang Cai, Bingxue Yi, Qing Chang
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引用次数: 0

摘要

折射引起的图像畸变在使用条纹投影轮廓术(FPP)进行跨介质三维(3D)形状测量时产生很大的误差。提出了一种基于像素偏差查找表(PD-LUT)的折射误差补偿方法。首先,将有光折射和无光折射的像素偏差构建为PD-LUT。然后,利用PD-LUT和三线性插值算法确定测量中的误差补偿值,对测量点的错误像素坐标进行校正。最后,利用校正后的像素坐标和FPP获取无折射误差的三维数据。与需要确定光的传输轨迹和/或提供折射界面特征信息的方法相比,该方法简单易于实现,因为它消除了光线追踪和手动粘贴特征到界面上的复杂和难以实现的过程。通过标准台阶的三维形状测量和球面物体的三维形状测量两个实验,验证了基于PD-LUT的折射误差补偿方法的性能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Refraction error compensation method based on a pixel-deviation look-up table for fringe projection profilometry in the cross-media three-dimensional shape measurement.

Refraction-induced image distortion produces large errors in cross-media three-dimensional (3D) shape measurement using fringe projection profilometry (FPP). In this Letter, a refraction error compensation method based on a pixel-deviation look-up table (PD-LUT) is proposed. First, pixel deviation with and without light refraction is constructed as PD-LUT. Then, with the PD-LUT and a tri-linear interpolation algorithm, error compensation values in measurement are determined for correcting the erroneous pixel coordinates of measured points. Finally, 3D data without refraction errors are retrieved with the corrected pixel coordinates and FPP. Compared with methods that need to determine the transmission trajectory of light and/or provide feature information for a refractive interface, the proposed method is simple and easy-to-implement, because the complicated and hard-to-implement processes of ray tracing and manually pasting features onto the interface are removed. Two experiments, including 3D shape measurement of a standard step and 3D shape measurement of a spherical object, are conducted to demonstrate the performance of the proposed refraction error compensation method based on PD-LUT.

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来源期刊
Optics letters
Optics letters 物理-光学
CiteScore
6.60
自引率
8.30%
发文量
2275
审稿时长
1.7 months
期刊介绍: The Optical Society (OSA) publishes high-quality, peer-reviewed articles in its portfolio of journals, which serve the full breadth of the optics and photonics community. Optics Letters offers rapid dissemination of new results in all areas of optics with short, original, peer-reviewed communications. Optics Letters covers the latest research in optical science, including optical measurements, optical components and devices, atmospheric optics, biomedical optics, Fourier optics, integrated optics, optical processing, optoelectronics, lasers, nonlinear optics, optical storage and holography, optical coherence, polarization, quantum electronics, ultrafast optical phenomena, photonic crystals, and fiber optics. Criteria used in determining acceptability of contributions include newsworthiness to a substantial part of the optics community and the effect of rapid publication on the research of others. This journal, published twice each month, is where readers look for the latest discoveries in optics.
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