摘要
针对航空序列摆扫图像中心倾斜投影视角变化大的问题,提出一种基于中心投影变换与SIFT相结合的图像拼接方法。该方法首先根据摆扫机构提供的参数,结合中心投影构像方程计算出图像的投影变换矩阵,用于对序列摆扫图像进行校正;运用SIFT算法提取图像重叠区域的特征点,并采用欧氏距离进行特征点匹配;然后利用RANSAC算法剔除错误匹配点,并计算出变换矩阵对图像进行配准;最后采用渐入渐出的图像融合方法得到无缝拼接的图像。通过与传统图像拼接方法进行对比,实验证明文中提出的方法较大地提高了配准的精度以及拼接效果。
To solve the problem,that the center oblique projection has great variation in angle of view,an image mosaic method base on center projection transformation and SIFT is presented for scanning image sequence. First of all,according to the parameters provided by the scanning mechanism and the center projection imaging equation,the projection transformation matrix which is applied to correcting the sequence scanning image is calculated,the SIFT algorithm is utilized to extract the fea-ture points of the image overlap area,which are matched by using Euclidean distance,and then the RANSAC algorithm is used to eliminate the error matching point and calculate transformation matrix for image match. Finally,the seamless mosaic image is obtained by the image fusion method. Compared with the traditional fusion method,the results show that the accuracy of image match and image mosaic effect are improved by the proposed image mosaic method.
出处
《现代电子技术》
北大核心
2015年第9期59-64,共6页
Modern Electronics Technique
基金
国家863高技术研究发展计划(2013AA×××2023)
长江学者和创新团队发展计划资助
