实验流体力学2026，Vol.40Issue(3)：88-99,12.DOI:10.11729/syltlx20240012
三色掩膜单彩色相机三维PIV粒子三视角图像提取研究
Research on trichromatic mask for 3D PIV particle image extraction using a single color camera from three views
摘要
Abstract
The trichromatic mask single-color camera 3D PIV technology uses an optical trichromatic mask element to modulate the imaging light path of a color camera,combining color information with perspective information.This enables the RGB channels of the color-sensitive chip to record images of tracer particles from three perspectives,achieving single-camera 3D flow field measurements.Color cameras typically use a single sensor with a Bayer mask to capture color images.To obtain complete three-channel information of tracer particles,the missing color components in the Bayer image must be restored through demosaicing to extract the three-perspective images.This paper employs High Quality Linear Interpolation(HQLI)algorithms,Gradient Based Threshold Free(GBTF)algorithms,and deep learning algorithms based on U-Net++neural networks to demosaic particle Bayer images.The quality of three-perspective image extraction by these three algorithms is evaluated using image evaluation metrics and the impact on particle reconstruction quality Q.Simulation experiments on artificially synthesized Gaussian vortex 3D flow fields are conducted to analyze the impact of these algorithms on measurement error.Zero-Net Mass Flux(ZNMF)jet experiments are utilized to study the demosaicing of experimental particle images and analyze the results of transient velocity fields.The results demonstrate that,compared to traditional algorithms(HQLI,GBTF),the deep learning algorithm based on U-Net++neural networks can more effectively extract three-perspective images of particles,thereby reducing measurement error.关键词
三色掩膜PIV技术/单台彩色相机/Bayer图像去马赛克Key words
trichromatic mask PIV technique/a single-color camera/Bayer image demosaicing分类
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张勇,丁俊飞,刘逸群,梁晓艺,田海平..三色掩膜单彩色相机三维PIV粒子三视角图像提取研究[J].实验流体力学,2026,40(3):88-99,12.基金项目
国家自然科学基金项目(12102284,12332017,12172242) （12102284,12332017,12172242）
山西省基础研究计划项目(20210302124262) （20210302124262）
春晖计划项目(202200257) （202200257）
