多场景下基于快速相机标定的柱面图像拼接方法

针对目前利用相机标定参数进行图像拼接的方法存在受场景限制大、标定过程复杂而耗时长的问题,提出一种多场景下基于快速相机标定的柱面图像拼接方法。首先,利用棋盘格标定板角点特征提取精度高的特点,使其分别位于两两邻接图像的重叠视场中,对该图像序列依次进行角点提取、精确化和匹配等预处理,以准确快速求解出待拼接图像间的配准参数;然后利用标定得到的配准参数快速拼接图像,通过柱面投影以保持图像的视觉一致性,并采用多频段融合以保留图像的细节信息;最后,将整个系统搭建在低功耗嵌入式平台,实现可在多场景下完成快速标定及基于标定参数的拼接过程。实验结果表明,该文方法在室内及隧道等场景下可准确快速完成相机标定,图像拼接过程耗时短,同时可保证较高的拼接精度和较好的成像效果,具有较强的鲁棒性。

Cylindrical image mosaic method based on fast camera calibration in multi-scene

A cylindrical image mosaic method based on fast camera calibration in multi-scene is proposed to solve the problems of scene limitation and complex calibration process in image mosaic using camera calibration parameter.Firstly,the accurate corner feature of checkerboard calibration board is used to make it in the overlapping field of view of two adjacent images.Then,the image sequence is pre-processed by corner extraction,precision and matching,so that the registration parameters between the images to be stitched can be solved accurately and quickly.After that,the cylindrical projection is used to maintain the visual consistency of the images,and the multi-band fusion is used to retain the details of the images.Subsequently,the images are stitched using registration parameters obtained by calibration.Finally,the whole system is built on a low-power embedded platform to accomplish fast calibration and mosaic process based on calibration parameters in multi-scene.The experiment results show that the proposed method can accomplish camera calibration quickly and accurately in indoor and tunnel scenarios,and the image mosaic process is time-consuming.Meanwhile,it can ensure better stitching accuracy and imaging effect,and has strong robustness.