摘要
介绍了多片非共线TDI CCD传感器,并分析了该类传感器的成像特点。用SIFT算法提取片间连接点,用分段仿射变换模型描述分片CCD图像的平移、旋转和缩放,利用大量连接点构建误差方程,求解仿射变换系数,最终实现分片TDI CCD图像的几何拼接。采用某高分辨率卫星遥感图像对提出算法进行实验验证,结果表明:分段仿射变换拼接算法总体拼接精度达到子像素级。
Non-collinear TDI CCDs sensor was introduced and its imaging characteristics were analyzed.Piecewise affine transformation model was adopted to describe the shift,rotation and zoom factor of TDI CCDs imagery after extracting tie points using SIFT algorithm.The coefficients of affine transformation were obtained through the solution of the error equation constructed by large numbers of tie points and finally TDI CCDs imagery was geometrically stitched.A certain high resolution satellite remotely sensed imagery was adopted to verify this algorithm.The experiment results showed that the total precision of piecewise affine transformation stitching algorithm could reach sub-pixel level.
出处
《测绘科学技术学报》
CSCD
北大核心
2013年第5期505-509,共5页
Journal of Geomatics Science and Technology
基金
国家自然科学基金项目(41101396
41001262)
