Wasielewski J E
Appl Opt. 1971 Nov 1;10(11):2439-41. doi: 10.1364/AO.10.002439.
An experimental study was conducted to determine the effects of nonoptimum noise conditions upon the SNR of optical spatial filters. The experiments were performed utilizing matched and inverse filters that are generally recognized as the best types of filters for pattern recognition. Their signal-to-noise ratios were compared as a function of varying background noise. The results indicate that (1) the SNR is a decreasing function of increasing background noise size, and (2) the performance difference between the inverse and matched filters increases as the noise size decreases.
进行了一项实验研究，以确定非最佳噪声条件对光学空间滤波器信噪比的影响。实验使用了匹配滤波器和逆滤波器，它们通常被认为是模式识别中最佳类型的滤波器。比较了它们的信噪比随背景噪声变化的函数关系。结果表明：（1）信噪比是背景噪声大小增加的递减函数；（2）逆滤波器和匹配滤波器之间的性能差异随着噪声大小的减小而增大。
