摘要
鱼眼镜头以其较大的视场能够显著提高获取建筑物立面影像的效率,为纠正其严重的变形,提出基于数字畸变模型的方法,该方法与基于函数模型的纠正方法存在根本的区别,首先通过预检校得到所有像点的总体畸变,然后建立畸变改正模型,用于逐点修正存在变形的影像,该模型不但包含了由于鱼眼镜头的球面成像原理所引起的像点位移,也包括了镜头自身的各种畸变.试验证实该方法的正确性和有效性.
How to obtain facade image of building is a key technique in cyber city. Because of its bigger field visual, fish-eye lens has peculiar advantage in getting facade image. In order to remove the quite severe distortion of image getting by fish-eye lens, many ways have been expounded in past times. They almost establish the functional relationship describing the process of imaging approximately. The general ways employ complex algorithm such as nonlinear optimization and image processing for final results. A new way for calculating the distortions of all pixels （digital distortion model） is put forward. After correction of the image using digital distortion model, the distortion has been removed. According to the theory of vanishing points of building, facade image of building can be obtained. Tests have been conducted to verify that the method is rational and effective.
出处
《武汉大学学报（工学版）》
CAS
CSCD
北大核心
2007年第1期105-109,共5页
Engineering Journal of Wuhan University
关键词
鱼眼镜头
数码相机
畸变模型
fish-eye lens
digital camera
distortion model
