【摘要】 对应点搜索的精度是保证基于条纹投影的三维测量系统性能的关键因素之一,它直接影响到后期深度测量数据的匹配及融合的精度。目前基于相位相关技术的亚像素查找技术能够保证精度,但前期双方向条纹采集时间过长;而基于单方向条纹相位插值算法的对应点搜索未考虑镜头畸变,模型简单化造成精度下降。在透镜畸变模型下提出以绝对相位和极线参数作为两方向坐标,并结合相位线性插值算法的亚像素对应点搜索方法。理论分析和实验结果证明了所提出方法的有效性。更多还原

【Abstract】 As a crucial part of 3D measurement system based on fringe projection technique, correspondence search between two adjacent range images would directly influence on matching and fusion procedure of the depth data. The conventional sub-pixel matching method by means of phase correlation can achieve a high level of accuracy, which would also bring on the disadvantage of time consumption due to capture of two vertical sinusoidal fringes. Another technique utilizing linear interpolation algorithm based on single direction fringe projection might cause accuracy declination as a result of simplification in imaging model. A novel method combined with linear interpolation algorithm was proposed, which used absolute phase and parameters of epipolar line as two mark of correspondence. Theoretical analysis and experiment results demonstrate the validity of proposed technique.更多还原