彩色组合编码条纹光栅轮廓术

研究了一种新的编码光栅投影三维轮廓术。其中投影光栅利用彩色空间红、绿、蓝三基色相互独立的特性，用彩色条纹对光栅进行编码，以白色条纹为起始位，后接红、绿、蓝（R、G、B）三种颜色的条纺组成一组。改变红、绿、蓝的排列顺序可使各组有不同的编码。根据排列组合原理，红、绿、蓝三色可有6种不同的排列方式。经过编码处理的光栅在保证测量精度不变的前提下，加大了高度测量的范围。由于每条纹只采用0和255两个状态，因此具有较强的抗干扰能力。测量的精度主要取决于图像的分辨率。

Color Permutation Coded Grating Profilometry

A novel profilometry with color encoded projecting grating is proposed. The grating is composed of white, red, green, blue and black strips. The white strip is used as beginning strip and followed by red, green and blue strips. The black strip is placed between two color strips to increase the period of grating. Thus eight strips form a group. Changing the order of color strips, different coding groups can be got. According to the principle of permutation, there are six kinds of arrangement of color strips for R, G, B colors, and so 48 strips is in one period of the grating. By decoding processing, the shape of an object can be obtained from single image. The obtained measurement depth is even wider than the depth of field of the CCD camera. Because the strips have only two logical states, the proposed structure light system possesses high ability of disturbance resistance.