基于图像的飞行器红外辐射特性测量

通过将目标在一定波段内的红外辐射等效为红外成像系统前一定距离下黑体在对应波段内的红外辐射,建立了等效辐射方程。根据黑体辐射定标实验数据,利用非线性回归方法确定了在不同的积分时间条件下红外凝视成像系统输出红外图像的灰度值与在一定距离下的黑体温度之间的定量关系,建立了辐射定标方程。在Visual C++6.0平台下,在对红外目标图像进行SUSAN滤波等预处理后,分析了已知目标距离的红外图像的灰度均值。首先根据辐射定标方程计算出目标等效为黑体的温度,然后利用等效辐射方程反推目标的红外辐射强度,以达到根据跟踪的红外图像确定红外目标辐射特性的目的。此项研究不仅可以为目标识别提供目标分类、识别和辨认所必需的光谱数据库,而且还可以为红外预警提供重要的参考数据。

Measurement of the infrared radiation characteristic of the aerobat based on images

The equivalent radiation equation is obtained on condition that the target infrared radiation at certain waveband is equivalent to the blackbody radiation of the corresponding waveband at certain distance in front of the infrared staring imaging systems.The radiation calibration equation,i.e.the quantitative relation at the different integration time between the gray-scale value of the output infrared image of the infrared staring imaging systems and the temperature of the blackbody at certain distance,is acquired by the non-linear regression method,according to experiment data of the blackbody radiation calibration.Image noise is removed by SUSAN filtering,and the average gray-scale value of the infrared image in which the target distance is given,is calculated at the platform of Visual C 6.0.The temperature of the equivalent blackbody is computed by the radiation calibration equation and the infrared radiation intensity of the target is acquired by the equivalent radiation equation.So the aim that the infrared radiation intensity of the target can be obtained according to the the tracking infrared image is achieved.This research will play a important role in acquiring spectrum database which is used to classify target,recognize target and identify target.Furthermore,it can be used in infrared early warning.