摘要
在 ESPI 条纹中,由于存在散斑颗粒,使得条纹对比度极大地下降.并给进一步的分析造成较大的因难.本文用二维 FFT 方法,并配以多种低通滤波函数,有效地消除了条纹图中的散斑颗粒。该方法对原始条纹图质量无任何要求,适用于各种形状的条纹.
Speckle noise in fringes of ESPI causes low contrast and much more difficulties for further analysis.In this paper,a method,in which 2—D FFT and low—pass filter are used,is proposed to eliminate the speckle noise.This method has no demand to the quality of original pattern and may be adopted for fringes with any shape.
出处
《实验力学》
CSCD
北大核心
1992年第2期177-180,共4页
Journal of Experimental Mechanics
