摘要
在虚拟现实,机器人导航及视觉监控等领域,需要使用具有较大视角的鱼眼摄像机,这样得到的图像被称为鱼眼图像.鱼眼图像都有不同程度的变形和失真.该文通过先确定鱼眼图像的中心和半径,再用一种简单的数学模型即球面投影,实现了180度鱼眼图像的还原,并在把视点固定在光学中心的情况下,在上下左右四个方向实现了图像的漫游.
In the field of virtual reality, robot navigation, visual monitoring and so on, a fisheye camera with a large view is needed. But the fisheye image taken this way possesses a kind of distortion at different level. In this paper, we fast estimate the center and the radius of the fisheye image. Then we transform the fisheye image of 180 degree to normal perspective image. By taking the center of sphere model as our viewpoint and using a simple mathematical model of sphere projection, the navigation in four thrections is realized.
出处
《湘潭大学自然科学学报》
CAS
CSCD
北大核心
2007年第2期118-122,共5页
Natural Science Journal of Xiangtan University
基金
国家自然科学基金资助项目(10571053)
湖南省教育厅青年资助项目(04B037)
关键词
鱼眼图像
失真
漫游
校正
fisheye image
distortion
navigation
calibration
