桶形畸变图像的一种校正方法

通过对广角镜头拍摄的图像所产生的几何畸变的特性进行研究,结合摄像头成像原理,提出一种几何校正方法来消除广角镜头引起的桶形畸变。首先通过对广角摄像头进行标定,获得摄像头的径向畸变系数,然后根据与点到畸变图像中心的半径有关的畸变映射关系完成源图像到目标校正图像的空间坐标映射,最后通过最近邻算法完成孔洞填充得到无畸变的图像,从而实现对桶形畸变图像的校正。实验结果表明,这种校正方法对于采用广角镜头拍摄的含有桶形畸变的图像校正效果良好,并具有较好的实用价值。

A correction method of barrel distortion image

Through the study of images distortion of wide Angle cameras,combining with camera imaging principle,it raises a kind of method which could effectively eliminate barrel distortion of wide Angle cameras.To obtain radial distortion coefficient of lens,it firstly calibrated the wide Angle camera.Second,according to the relationship of radius,every coordinate to image distortion center,it completed the coordinates of mapping between the source image and distortion image.At last,it filled the holes with the nearest interpolation algorithm to get a perfect image for observers.The experimental results show that the method put forward is effective to correct barrel distortion of wide Angle cameras.Meanwhile,it makes good practical value.