grain noise

In a white-light optical processing system, if the filter apertures vibrate randomly around the rainbow diffraction spectra at Fourier plane, the amplitude grain noise of the grating encoded film in the output plane can be suppressed considerably and the output SNR is improved.

本文提出在白光信息处理中，可通过使滤波孔在傅里叶面彩虹状衍射谱附近做随机振动的方法，达到抑制光栅编码片的振幅型颗粒噪声。

The superficial grain noise of coating layer on battery electrodes is bad.

极片涂敷层表面颗粒噪声较强。

they are also quite useful in the analysis of noise problems, e. g. that of film grain noise.

它们对分析噪声问题（例如底片颗粒噪声）也是很有用的。

The time frequency difference between grain noise and defect signal provide a possibility for enhancement of signal-to-noise ratio ( SNR) in ultrasonic testing.

晶粒噪声和缺陷信号的时频特征的差异，为提高超声检测的信噪比提供了可能。