摘要
基于透视投影变换、相片上椭圆边界点的原像共圆和射影变换的结合性,建立了确定圆心像的两个数学模型,并给出了计算方法。结果表明,模型2简单,计算量小,精度高,为圆心位置的检测及视觉检测中相机内部参数标定等问题的解决提供了有效的方法。
Based on the fact that the inverse images of the elliptical boundary points on the photo are concyclic, and combinated with perspective projection transformation and projective transformation, two mathematical models to determin the circle center of an image are established. The calculating methods are also given. The reults show that the model 2 is of low computational complexity and high precision. The model also provides an effective method to solve the problems such as detection center position, calibration of a camara intrinstic parameters, and so on.
出处
《西安邮电学院学报》
2009年第3期117-119,共3页
Journal of Xi'an Institute of Posts and Telecommunications
基金
山西大同大学科学基金(2008k5)
关键词
小孔成像
椭圆
射影对应
结合性
pinhole imaging system
elliptic
projective correspondence
associativity
