光学相关器中信号相关噪声和信号无关噪声对纯相位滤波器模式识别性能的比较影响

Comparative effects of optical-correlator signal-dependent and signal-independent noise on pattern-recognition performance with the phase-only filter.

作者信息

Terrillon J C

出版信息

Appl Opt. 1995 Nov 10;34(32):7561-4. doi: 10.1364/AO.34.007561.

DOI:10.1364/AO.34.007561

Abstract

The comparative effects of optical-correlator signal-dependent and additive signal-independent noise on correlation-filter performance are analyzed by three different performance measures. For an identical value of the signal-to-noise ratio imposed on each type of noise in a binary input image, computer simulations performed with the phase-only filter show (i) that additive Gaussian signal-independent noise yields a much larger correlation-performance degradation than signal-dependent noise and (ii) that the different types of signal-dependent noise lead to similar correlation results because of similar effects on the input image that are inherent to the nature of the noise.

摘要

通过三种不同的性能指标，分析了光学相关器中信号相关噪声和附加信号无关噪声对相关滤波器性能的比较影响。对于施加在二值输入图像中每种噪声类型上的相同信噪比，使用纯相位滤波器进行的计算机模拟表明：（i）附加高斯信号无关噪声导致的相关性能下降比信号相关噪声大得多；（ii）不同类型的信号相关噪声由于对输入图像具有类似影响（这是噪声性质所固有的），从而导致相似的相关结果。