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相机畸变是影响基于图像的几何量测、三维重建精度的重要因素之一。空间中一条直线在透视投影作用下理应成为一条直线,但因畸变其构象发生弯曲,通过场景信息中共线点的透视投影不变性可以求解出相机径向畸变系数。考虑畸变的渐变特性,该文设计了基于数位的相机径向畸变参数解算方法:将相机一阶径向畸变系数k1用科学计数法X×10-m表示,依次确定其指数m及尾数X,直至满足精度的设定,最终求解出k1的值。最后通过模拟和实例数据对该方法进行了分析验证。 更多还原

【Abstract】 Camera distortion is one of the important factors which affect accuracy of geometric measurement and three-dimensional reconstruction based on image.The images of straight spatial lines become curves in perspective projection because of distortion,and we can calculate the radial distortion parameters through the invariability of collinearity of the points on the line.In view of the gradient characteristics of camera distortion,this paper presents a method of camera radial distortion parameters c...