提高广角成像系统几何畸变数字校正精度的方法

光学成像系统非线性几何畸变的高精度数字校正仍然是一个未能很好解决的问题。其中 ,衡量畸变程度的参数难以精确测量是最重要的原因之一。在以径向几何畸变为主的非线性几何畸变模型中 ,通过对影响畸变参数测量精度的各种因素的分析 ,提出了提高畸变参数测量精度的方法。详细介绍了通过计算机自动测量畸变参数的算法 ,并给出了实现数字校正的算法。实验表明 ,能够比较精确地测出实现畸变校正所需的各参数。应用到不规则平面物体面积的测量中 ,获得了很好的效果

Improving the precision of digital distortion correction of wide-angle imaging system

The precision of digital correction of nonlinear geometry distortion in wide angle optical imaging system is still not high enough One of the most important reasons is that the parameters presenting the degree of distortion are very difficult to be detected accurately Under the distortion model that considers the radial geometry distortion as primary factor for wide angle optical imaging system, the factors that influence the accuracy of distortion parameters are analyzed, how to improve the precision of distortion parameter detection is discussed The algorithm of how to calculate distortion parameters by computer is discussed in detail, and the method of distortion correction is given By experiment, the parameters needed in distortion correction are determined accurately Applying to area measurement of irregular plane object, accurate result was obtained