基于TOD的红外成像系统作用距离研究  

Research on Operating Distance of Infrared Imaging System Based on TOD

作　　者：张鹏[1] 吴平[1] 曾辉[1] 

机构地区：[1]南京航空航天大学理学院,江苏南京211100

出　　处：《红外》2010年第12期26-30,共5页Infrared

摘　　要：以三角形方位鉴别(TOD)为基础,建立了新的目标获取模型。根据TOD理论,首次结合能量的观点,推导了目标辐射能量通过红外成像系统到达人眼/大脑时可被感知的信噪比。以视觉可感知的阈值信噪比作为理论基础,建立了新的TOD表达式。将目标按照面积元不同的温度空间分布划分为N个等效等边三角形,以辐射原理为基础,建立了人眼观察到目标时TOD与红外成像系统获取目标距离之间的关系式。根据TOD准则,在实例中得出了不同鉴别等级(探测、识别、辨认)时红外成像系统的作用距离。A new target acquisition model is established on the basis of Triangle Orientation Discrimination （TOD）.According to the TOD theory and the viewpoint of energy for the first time,the signal-to-noise ratio which can be sensed by human eyes/brain when the radiation energy of the target obtained by an infrared imaging system is derived.By taking the visually sensed threshold signal-to-noise as the theoretical basis,a new TOD expression is established.The target is divided into N equivalent and equilateral triangles according to the difference of temperature spacial distribution of the target.Then, the relation between TOD and the operating distance of the infrared imaging system when the target can be seen by human eyes is established according to the radiation theory.Finally,in the light of the TOD criteria,the operating distance values of the infrared imaging system at different discrimination levels（detection,recognition and identification） are obtained in actual examples.

关 键 词：红外成像系统 三角形方位鉴别 三角形方位鉴别准则 

分 类 号：TN216[电子电信—物理电子学]