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采用一种基于小波数字滤波［１］的正交解调算法，用于三维形貌测试系统中的相位分布计算，文中考察了基于软件相移的相位计算［２］［３］，以及空域均值滤波和小波低通数字滤波的结果，得出由一副单帧变形光栅图可迅速、精确地重建物体的三维形貌，文中给出了计算机仿真和真实的螺旋浆叶片的实测结果。
A quadrature demodulation algorithm based on wavelet digital filtering [1] is used to calculate the phase distribution in the three-dimensional topography test system. Phase calculation based on software phase shift [2] [3] and spatial averaging Filter and wavelet low-pass digital filtering results obtained by a single-frame deformation grating can quickly and accurately reconstruct the three-dimensional topography of the object, the paper gives the computer simulation and real propeller blade measured results.