星载非共线TDI CCD成像数据的高质量内视场拼接是保证影像后续处理和应用的基础。本文提出一种非共线TDI CCD成像数据内视场拼接方法,该方法基于物方投影面和相机的传感器几何模型,建立了从拼接影像像点到原始影像像点的坐标转换关系,进而采用间接法影像纠正的方式对原始影像进行重采样生成拼接影像。本文在描述非共线TDI CCD严格成像几何模型之后,详细叙述了方法的基本原理、潜在的误差来源以及方法的实现流程,并通过ZY‐102C卫星的高分辨率(HR)相机成像数据进行了试验验证,对拼接精度的分析与评价证明了方法的可行性。
High‐quality inner FOV (field of view) stitching is a necessary step for post‐process and appli‐cation of images captured by spaceborne non‐collinear TDI CCD camera .This paper presents an inner FoV stitching method for non‐collinear TDI CCD images .The method utilizes the projection plane in object space and the sensor geometric model of the camera to establish the coordinates transformation rel ation between pixels of the stitched image and pixels of the orginal image , and then performs image resampling to generate the stitched image by indirect image geometric rectification .After describing the strict geometric models of non‐collinear TDI CCD images ,the basic principle ,the potential error sources and the workflow of the method are discussed in detail .Finally ,experimental verification is carried out on the high‐resolution (HR) camera images of ZY‐1 02C satellite ,and the accuracy evaluation of the generated stitched images indicates the feasibility of the presented method .