中文摘要：

TDI-CCD相机是当今高分辨卫星系统的主要成像载荷。由于TDI的特殊成像机理,为了确保图像清晰,需要在轨实时调整每一行积分时间。这里以天绘一号多片交错式TDI-CCD高分辨相机为研究对象,推导了行积分时间跳变与相邻CCD重叠区同名点视差变化的关系,表明由于行时跳变造成的同名点错位最大可达6像素。针对存在行时跳变的卫星影像,可以在沿轨方向以行时均衡为标准进行一维重采样,实验表明该方法可以较好地消除行时跳变造成的视差错位,从而为高精度的影像拼接创造条件。

英文摘要：

TDI-CCD cameras are the main payloads onboard many high-resolution satellite systems. Due to its special imaging mechanism, the dynamic adjustment of integration time makes it possible that different integration times exist in one image. This paper focused on the multiple TDI-CCD of high resolution camera onboard Mapping satellite-1. Analyses about the relationship between integration time change and homonymy points parallax show that it could cause 6 pixels mismatch in the mosaicking of multiple TDI-CCD images. In this paper, the technology of integration time normalization was adopted to resample satellite images. Experimental results showed that this method could release the mismatch effect caused by integration time change and create a good condition for high accuracy mosaic.