应用多项式插值函数提高面阵CCD尺寸测量的分辨力

Improving Resolution of CCD Camera in Dimensional Measurement by Polynominal Interpolation

在图像测量系统中，测量的精度主要取决于ＣＣＤ摄像机的分辨率。为提高图像测量系统的测量精度，本文首先提出了一种具有保持边缘特征和滤波功能的十字窗口边缘自动检测算法，并在此基础上，本文又提出了以多项式插值为原理的新的亚像无边缘检测算法。

The measurement accuracy depends mainly on the resolution of CCD camera in image measurement system. For improving the accuracy of the image measurement system,this paper proposed a crossed window automatic edge detection algorithm which has the properties of holding edge,reducing noise and adjusting threshold automatically in case of nonuniform luminary, and furthermore, a new subpixel edge detection algorithm based on polynominal interpolation is presnted. By the algorithms the measuring resolution of CCD camera in image measurement system might be improved by about 60 times.