关键词: 红外图像, 飞机飞行姿态, 几何轮廓, 关键攻击部位

Abstract: In order to improve the destroying effect of air-to-air missile based on infrared imaging guidance，a recognizing method for the airplane’s key attacking part is proposed，which combines the recognizing of flying gesture with geometry contour analysis.The infrared airplane image is separated into background，airframe and plume by the fuzzy-c means clustering.The composed invariant moment is computed，which consists of the Hu moment and the normalized moment of inertia.Then the flying gesture is judged by the composed invariant moment and the ratio of the different parts’ area for airplane in infrared image.The airplane’s head，shaft，wing and tail are abstracted and the key attacking part，for example，cockpit，is recognized by the geometrical proportional relation of these parts.In order to improve the discerning speed and precision，the processing for the subsequent image frames is guided by the steady judging parameters which are acquired by the prior frames’ processing.Experimental results show that the method given by this paper can identify the airplane’s key attacking part in infrared image effectively and provide essential support for the air-to-air missile’s precise strike.

Key words: infrared image, airplane’s flying gesture, geometry contour, key attacking part