红外背景干扰研究

根据从许多地区收集来的录象磁带上的图象数据和大量红外图象数据，对红外背景图象内的干扰进行了研究。图象内的噪声是以象元电平为单位的均方根形成计算。图象经过空间滤波处理，对其内的干扰再进行计算。为获得关于红外背景图象的空间频率构成的信息，在滤波和非滤波两种状态下计算了图象的光谱密度，把计算出的干扰值输入数据库取出多组数据并绘图，确定参数量（如天气、背景类型和测量条件等）对干扰电平的影响。

A Study of Clutter in Infrared Backgrounds

Based on a variety of IR image data and videotaped image data from different areas, clutters in IR background are analysed. The clutter in the images was computal as the rms noise inthe pixel levels over the image. The mages were subjected to spatial filtering processing and the clutter calculations were repeated on the filtered images. Spectra; densities were opmputal for the imagesin both filtered and unfiltered States to obtain information on the spatial frequency content of IRbackground images. The computed dutter values were entered into a data base and sets of datawere extracted and plotted to determine the influence of parameters Such as weather scene type andmeasurement conditions on the clutter leve of an image.