一种基于拼接算法的鱼眼图像畸变校正方法

A Novel Method Based on Stitching Algorithm for Fish-Eye Image Distortion

鱼眼镜头带来宽广视野的同时带来严重桶形畸变问题,传统投影变换模型的鱼眼校正方法算法原理较为简单,实现容易且成本较低,但是通常校正效果不尽人意。提出一种新颖的鱼眼畸变矫正方法,首先将原始鱼眼图像进行平面投影,通过合理的投影方式得到多个有视野重复区域的图像块,再参考使用半投影变换的图像拼接算法的思想构建直纹面方程对不同的图像块进行拼接。实验结果表明,该算法运算量略微偏大但对畸变的校正效果达到预期,生成图像质量较好,符合人眼的视觉直观感受。

The fisheye lens brings a wide field of vision and serious barrel distortion.The fisheye correction method of the traditional projection trans⁃formation model has a simple algorithm principle,easy implementation and low cost,but the correction effect is usually not satisfactory.A novel fisheye distortion correction method is proposed.First,the original fisheye image is projected on the plane,and multiple image blocks with repeated fields of view are obtained through a reasonable projection method,and then the idea of image stitching algorithm using semiprojection transformation is constructed.Ruled surface equation stitches different image blocks.The experimental results show that the al⁃gorithm has a slightly larger amount of calculation but the correction effect for distortion is expected,and the quality of the generated image is good,which is consistent with the human visual perception.