为了对由飞船姿态不稳或隔振装置的振动抑制残余量等因素产生的宽频带像移进行测量，提出了基于时间延迟积分(TDI)传感器拼接区所成图像的像移测量方法。定义了偏移系数，用以衡量成像期间像移速度与TDI传感器积分时间之间的失配度，以调制传递函数(MTF)为相机成像质量评价指标，分析了失配度与成像质量之间的关系，确定了满足成像质量的像移测量方法的精度范围；利用两片TDI传感器拼接区所拍图像存在相同内容、拍摄时刻不同的特点，阐述了基于TDI传感器拼接区图像的像移测量原理。实验结果表明测量精度达到0.2377 pixel，测量频带达到228 Hz，证明该方法能够对宽频带、高精度的像移进行有效测量。

In order to measure the wide-frequency-range image motion caused by spacecraft attitude instability or residual vibration of the vibration isolation devices, image motion measurement method using images taken from time delayed integration (TDI) sensors, overlapped area is proposed. Offset coefficient is defined to measure the mismatch between image motion velocity and integration time. The relationship between mismatch and image quality using modulation transfer function (MTF) as image quality evaluation index is analyzed. The image motion measuring accuracy range is determined. By taking full advantage of features of the images taken from TDI sensors, overlapped area that have the same content but are taken at the different time, the theory of image motion measurement method based on images taken from TDI sensors, overlapped area is elaborated. Experimental results show that the measurement precision can reach 0.2377 pixel, and the measurement bandwidth can reach 228 Hz, proving that this method can effectively achieve wide-frequency-range, high-precision measurement of image motion.