针对红外背景杂波的统计特性，提出了一种改进型的空间匹配滤波算法。
According to the statistic characteristics of IR background clutter, an improved spatial matched filter (SMF) is presented.
低信噪比条件下点目标的检测性能在很大程度上依赖于对红外背景杂波的抑制情况。
The effective detection for point target in low SNR IR images is dependent greatly on the suppression of background clutter.
首先分析了红外小目标、噪声及其杂波特性，提出了用小窗口的二维中值滤波进行背景估计；
Firstly, a background estimation method based on small window and two dimension median filter is presented after detail analysis of the model of small infrared target, noise and clutter.
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