中文摘要：

为排除强背景光，分析说明了背景光和投影栅条纹的在空域和频域的分布特点，提出了空间滤波器的设计方案，并通过计算机模拟证明：以布莱克曼函数作边缘分布的带通滤波器，能有效地抑制“吉布斯效应”，从而排除强背景光，提取清晰的光栅条纹。

英文摘要：

The characteristic of the distribution of the background light and the deformed grating patterns are analyzed, and the corresponding spatial spectrum filter is designed. The computer simulation proves that the band - pass filter with the Blackman - marginal image, so as to abstract the grating -distribution can restrain the “Oscillation Effect”, patterns form the strong backlight. advance the acutance of the