摘要
本文提出了一种新的大视场光学镜头畸变的计算机数值校正方法。首先设计了用于医用电子内窥镜的 12 0°大视场短焦距物镜 ,计算出 2 2个视场角的畸变值 ,通过这些畸变值拟合出视场角随畸变变化曲线。通过这条曲线可以计算出镜头在 CCD上所成图形的每一点的畸变值 ,进而计算出图像上每一点的理想位置 ,通过畸变图像上的点与理想图像的对应关系进行了计算机软件模拟校正 ,并设计了硬件校正电路。
This essay provides a design of a 120 ° wide sight field object lens for the endoscope in the medical fields.We have given the distortion of 22 sight fields and a curve according to the result of t he calculation.Therefore,we got a new scheme of distortion correcting.In this es say,we describe the process of using the curve to correct the distortion.At the same time,we provide the analysis and calculation of the correction error.Furthe rmore,we deduce the relationship between the distortion and the sight field and also discuss the method of distortion correcting with the hardware.
出处
《光电子．激光》
EI
CAS
CSCD
2000年第6期602-605,共4页
Journal of Optoelectronics·Laser
关键词
医用电子内窥镜
光学镜头
图像畸变
数字校正
medical electronic endoscope
optical lens
distortion correction
digital meth
