为克服传统质量导向相位展开方法无法正确展开多孤立物体的局限性,提出一种基于区域分割的立体质量导向相位展开方法.该方法将包裹相位分割为多个区域,并为每个孤立区域通过立体匹配算法确立左右相机多视图相位展开初始点,通过质量导向相位展开算法实现多视图孤立物体相位展开.进一步提出了基于区域双目立体展开相位匹配的单频条纹结构光三维(3D)测量,实现了单个频率包裹相位下的多孤立物体3D重建.实验结果表明,所提方法可以实现多孤立物体运动状态的3D重建,在四步相移和单幅条纹图条件下重建标准球的直径平均绝对值偏差分别为0.0135 mm和0.0347 mm.
Single-Frequency Fringe Structured Light 3D Measurement Based on Regional Stereo Matching
The traditional quality guided phase unwrapping method cannot correctly perform phase unwrapping for multiple objects.To overcome this problem,this study proposes a stereo quality guided phase unwrapping method based on region segmentation.Based on the phase edge of the isolated object,the wrapped phase is divided into several regions,and a stereo matching algorithm establishes the initial point of multi-view binocular phase unwrapping for each isolated region.Furthermore,the quality guided phase unwrapping algorithm realizes the phase unwrapping of multi-view isolated object.A single-frequency fringe structured light three dimensional(3D)measurement based on regional binocular stereo unwrapped phase matching is proposed,which achieves 3D reconstruction of multiple isolated objects under a single-frequency wrapped phase.The experimental results show that the proposed method can achieve a 3D reconstruction of multiple isolated objects in motion.The mean absolute error of diameter for the reconstruction of a standard sphere under four-step phase shifting and single-frame conditions is 0.0135 mm and 0.0347 mm,respectively.
3D reconstructionquality guidestructured lightstereo matchingphase unwrapping
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