摘要
由于光学镜头的成像特性,并且摄象机成像平面与景物平面间存在着倾角和转角,因而光学镜头摄象机获取的图片存在非线性的几何畸变,在对图像进行测量和定量分析之前,应消除这些畸变。为此,应用透视投影的灭点形成原理和双线性插值方法,研究了一种图像透视投影的校正方法,在校正后的图像基础上,建立图像坐标系和世界坐标系的关系模型,利用最小二乘法,实现空间定位。实验结果表明,利用该方法可得到理想的校正结果,定位精度比较准确,方法简便实用,实际应用表明,该方法是可靠有用的。
Image with geometricrec distortions, which wet induced by camera lens and position, must be corrected before measurement and ration analyse. In this paper, a rectification method of perspective projection by applying the theory of forming vanishing point and bilinear interpolation was presented, the image of perspective projection can berectified with this method was demonstrated. Establishing the model of image reference frame and world reference frame based on rectificated image, implement space localization with least-squares method. This method is simple and practical, and practical application shows that the method is reliable and valid.
出处
《四川理工学院学报（自然科学版）》
CAS
2011年第1期105-108,共4页
Journal of Sichuan University of Science & Engineering(Natural Science Edition)
关键词
双灭点
透视投影
几何校正
定位
图像处理
vanishing point
perspective projection
geometricrec rectification
localization
image processing
