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首页> 外文期刊>Journal of Zhejiang University. Science, A >Integrated phase unwrapping algorithm for the measurement of 3D shapes by Fourier transform profilometry
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Integrated phase unwrapping algorithm for the measurement of 3D shapes by Fourier transform profilometry

机译：傅里叶变换轮廓测量测量3D形状的集成相位展开算法

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摘要

An integrated and reliable phase unwrapping algorithm is proposed based on residues and blocking-lines detection, closed contour extraction and quality map ordering for the measurement of 3D shapes by fourier-transform profilometry (FTP). The proposed algorithm first detects the residues on the wrapped phase image, applies wavelet analysis to generate the blocking-lines that can just connect the residues of opposite polarity, then carries out the morphology operation to extract the closed contour of the shape, and finally uses the modulation intensity information and the laplacian of Gaussian operation of the wrapped phase image as the quality map. The unwrapping process is completed from a region of high reliability to that of low reliability and the blocking-lines can prevent the phase error propagation effectively. Furthermore, by using the extracted closed contour to exclude the invalid areas from the phase unwrapping process, the algorithm becomes more efficient. The experiment shows the effectiveness of the new algorithm.
机译：基于残留物和阻塞线检测，闭合轮廓提取和质量图来提出集成和可靠的相位展开算法，用于通过傅立叶变换的轮廓测量（FTP）测量3D形状。所提出的算法首先检测包裹相位图像上的残基，应用小波分析以产生可以连接相反极性的残留物的阻挡线，然后执行形态操作以提取形状的封闭轮廓，最后用途作为质量图的包装相位图像的调制强度信息和高斯操作的拉普拉斯。展开过程从高可靠性的区域完成到低可靠性，并且阻挡线可以有效地防止相位误差传播。此外，通过使用提取的封闭轮廓从相位展开过程中排除无效区域，该算法变得更有效。实验表明了新算法的有效性。

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