问题: 求助摘要翻译～～急急急～！！
介绍了可见光和红外成像的一般特性。分析了机场环境的一般特征，选取了最有特征的环境特点作为特征提取的依据。介绍了国内外特征提取和目标识别的一般情况，概述了几种目标识别和特征提取的方法，并对其进行筛选。详细分析和叙述了基于直线特征的机场特征提取算法。
关键词： 机场 直线 特征提取 目标识别
解答:
It introduced the common character of visible light and infrared imaging ,and analysed the common character of airport environment , and selected enviroment of the most characteristic as the base to character distilling . At the same time , it introduced the common complexion of character distilling and aim identification at home and abroad ,and summarized some ways and filtrated for them .And it also analysed elaborately and narrated the calculate way of airport character distilling on based of beeline character's airport .
key words : airport , beeline , character distilling , aim identification
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