一种通用的基于抛物面模型的鱼眼图像校正算法

鱼眼镜头具有较大的视场，但所拍摄图像会产生严重的桶形畸变，使用时需要进行校正。提出一种新的基于抛物面的透视投影模型，分析了此模型下图像的投影特征及抛物面参数对校正效果的影响，利用鱼眼图像中的特征点拟合出抛物面的最佳参数值，最后通过拟合后的抛物面模型将鱼眼图像映射成透视投影图像，实现了对鱼眼镜头畸变的校正。实验表明，与传统的球面投影模型相比，该模型有更好的校正质量。

A Common Fisheye Correction Algorithm Based on Paraboloidal Model

Fisheye lens have a large field of view, but the captured image will have a serious barrel distortion, so it need to be corrected. In this paper, a new paraboloidal perspective projection model is proposed, then the Projection characteristic of images in this model and the influence of paraboloidal parameters to the correction effect is analyzed. After that,the best parameters of the paraboloid is fitted by the feature points of the fisheye image and the fisheye im-age is mapped into a perspective projection image by this fitted paraboloidal projection model,then the distortion correc-tion of fisheye images are achieved. Experimental results show that the projection model has a better alignment quality than the traditional sphere projection model.