基于卷积滤波三维形貌光学检测中频谱自动移位的实现

Realization of spectrum auto\|shifting in 3\|D object shapes optical measuring technique based on convolution filtering

在投影栅相位法测量三维物体形貌技术中 ,利用栅线图像的条纹灰度值分布具有极大极小的特性 ,提出了一种有效算法 ,其特点是基于卷积滤波技术实现频谱的自动移位 ,而不需要利用频谱分析和频谱图来进行 。

It is significant to measure the 3\|D object shapes, because topographic information is needed in engineering, computer vision, and CAD/CAM. A robust algorithm is introduced in this paper. The algorithm, based on the fringes′ gray values max\|min distribution, can automatically and accurately carry out space frequency spectrum shifting without spectrum analysis and spectrogram in the technique of phase method of projected grating for 3\|D object shapes measurement. The new algorithm makes image processing much faster and the technique of object shapes measurement more automatic. Experimental results are also presented.