光学学报, 2013, 33 (2): 0215001, 网络出版: 2012-12-05
基于球面透视投影旋转矩阵的鱼眼图像匹配 下载: 525次
Fisheye Image Matching Based on Rotation Matrix under Spherical Perspective Projection
图像处理 球面透视投影 旋转矩阵 匹配 鱼眼图像 image processing spherical perspective projection rotation matrix matching fisheye image
摘要
针对视场范围大、变形严重的鱼眼图像,提出了一种基于球面透视投影模型的鱼眼图像匹配算法。在仅估计鱼眼图像焦距和主点的情况下,该方法先将鱼眼图像上的特征点投影到球面透视图像上,通过估计球面透视图像之间的旋转矩阵和平移向量来建立鱼眼图像特征点的对应区域,并利用球面图像上反投影点误差和的最小化优化旋转矩阵和平移向量,根据优化的参数确定鱼眼图像之间正确的匹配点。实验结果表明,在畸变较大的鱼眼图像上,提出的方法能得到比较满意的匹配结果。
Abstract
A stereo matching algorithm based on spherical perspective projection model for fisheye images which have severe distortions and a large field of view with 180° is presented. Only estimating the focal length and the principal point of two fisheye images, all feature points on two fisheye images are first projected onto two spherical perspective images. Then rotation matrix and translation vector between two spherical perspective images are computed to find two corresponding spherical image patches, which are mapped into two fisheye images. And these estimated parameters are refined through minimizing the re-projected error of all feature points on the spherical perspective images. The corrected correspondence points between two fisheye images are determined through the refined rotation and translation. Experiments with real fisheye images show that this method has satisfactory matching results for the severely distorted fisheye images.
祝海江, 徐晓波, 周靖林. 基于球面透视投影旋转矩阵的鱼眼图像匹配[J]. 光学学报, 2013, 33(2): 0215001. Zhu Haijiang, Xu Xiaobo, Zhou Jinglin. Fisheye Image Matching Based on Rotation Matrix under Spherical Perspective Projection[J]. Acta Optica Sinica, 2013, 33(2): 0215001.