Feature point extraction and tracking method is an important contents to studying imaging-based target tracking, and avails to the research on target identification, maneuver detection and so on.

特征点的提取和跟踪是基于图像的目标跟踪技术研究中的一项重要内容，对目标识别、机动检测等有着重要意义。

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The paper mainly researches the weak point moving target detection and tracking technology in the infrared image, introduced the domestic and foreign research dynamic and obtain achievement.

本文系统的研究了红外图像中微弱点状运动目标的检测及跟踪技术，介绍了国内外的研究动态和取得的成果。

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A lot of low altitude objects and the characteristics of point target make the detection and tracking even harder.

大量的低空背景景物以及点目标的特点——远距离、低信噪比、强杂波等，增加了目标检测和跟踪的难度。

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