Figure 1. Radial distortion plot for a particular camera lens: the arrows show where points on an external rectangular grid are displaced in a radially distorted image.
根据Brown畸变模型,径向畸变可以描述为:
其中,为径向畸变系数,。
切向畸变
切向畸变是由于制造工艺缺陷导致的镜头与成像平面不平行造成的。如Figure 2所示。
Figure 2. Tangential distortion results when the lens is not fully parallel to the image plane; in cheap cameras, this can happen when the imager is glued to the back of the camera.