N on linear calibration and finding circle edge were introduced to measure the images acquired.
系统选用背光源照明，采用非线性校准及查找圆边的方法对采集到的图像进行测量。
2
By means of Cauipotential lines, exact formulas for calculating the characteristic impedance of the coaxial systems consisting of a circle and a N- resular polygon are derived in this paper.
本文利用等位线导出了截面由圆和正N 边形组成的同轴线特性阻抗的严格计算公式。
3
This paper has proved that a plane curve cis a circle if and only ifc is the locus of a moving point that has a constant second power average of distances from n fixed points.