关键词: 从明暗恢复形状, 小波变换, 频率特性, 条纹相位

Abstract: To study the 3D reconstruction method of shape from shading，a new method is proposed combining the wavelet transformation with the traditional minimization algorithm.While an image is wavelet transformed，the frequency and the directional characteristics are different in different sub-frequency bands，so different reconstruction algorithms are chosen in different sub-frequency bands.The natural stripe phase is extracted directly in low frequency bands，and the traditional minimization algorithm is used in the high frequency bands.The ideal conditions supposed in the traditional shape from shading methods are no more necessary in the low frequency region，and the detail part restructuring quality of the minimization algorithm in the high frequency region is maintained in the proposed method.This method is applied to reconstruct several emulation images.The experimental results show that the error of this novel method is less than that of traditional minimization algorithm.

Key words: shape from shading, wavelet transformation, frequency characteristic, stripe phase