航空相机广泛采用像移补偿技术来提高成像质量和相机分辨力。本文分析了像移补偿的原理并介绍了国内外较多采用的像移补偿技术,如光学式像移补偿法、机械式像移补偿法、集成像移补偿法、数字式像移补偿法等。文中列举了像移补偿过程中获取重要参数速高比的常用方法,包括平行狭缝法、扫描相关法、外差法、光程差法、直接计算法等。最后讨论了像移补偿技术数字化的发展方向,以及速高比测量的数字化、实时化、小型化发展趋势,提出了采用面阵CCD结合高性能微处理器获取速高比的新思路。

Image Motion Compensation(IMC) has been widely used in aerospace cameras to improve the imaging quality and the resolution of cameras.In this paper,the principle of IMC is analyzed and several kinds of IMC technologies used at home and abroad are introduced,such as optical IMC,mechanical IMC,integrate IMC,digital IMC.Then some common methods including parallel-slit method,scan and correlation method,heterodyne method,optical path difference method,direct calculation method are given to obtain an important parameter,speed-altitude ratio.Finally,this paper discusses the developing trend for digital IMC,presents the digital,real-time and miniaturization of measuring speed-altitude ratio and brings forward a new idea for measuring speed-altitude ratio by combining an array CCD with a high-performance microprocessor.