摘要
在深入研究摄像机透视投影几何与摄像机径向畸变模型后,分析了平面上一条二次曲线与两条直线的关系,利用液晶显示器的动态刷新功能,在提出用于在任意方向下标定摄像机镜头畸变的标定板的基础上,提出了一种独立于摄像机内外参数标定的在任意方向下标定摄像机镜头畸变的方法。仿真实验中,按照径向畸变模型设计的畸变椭圆实验反求得到的理想椭圆与按照透视投影规律得到的理想椭圆具有很高的重合度。实物实验也表明本文的方法能够在任意方向下较为准确的求解摄像机镜头畸变参数。该方法可以应用于摄像机参数标定之前,消除标定过程当中镜头畸变对摄像机内外参数的耦合影响。
On the basis of radial distortion model and perspective projection geometry,the relationship between a conic line and two straight lines are analyzed.Then a method of measuring lens distortion with a calibration board designed to calibrate camera in all directions is proposed with the help of LCD dynamic refreshing function.In simulation experiment,the reversion of a designed distorted ellipse coincides with the ideal undistorted ellips,which shows that the coefficients of radial distortion can be obtained accurately using the proposed method.In real experiment,the distortion parameters can be measured accurately in all directions.The proposed measuring method is independent of both intrinsic and extrinsic parameters,so it can be applied before the calibration process and eliminate the coupling effect between distortion and camera parameters.
出处
《仪器仪表学报》
EI
CAS
CSCD
北大核心
2010年第9期2022-2027,共6页
Chinese Journal of Scientific Instrument
基金
国家自然科学基金(6071002)
江苏省自然基金(BK2010058)资助项目
关键词
摄像机标定
径向畸变
透视投影不变量
任意方向
camera calibration
radial distortion
perspective projection invarient
in all directions
