contrast filter meaning in English

反差滤光片
反差效果滤光片
反衬滤光片
强反差滤光镜
强反差滤光器
强反差滤色镜

For the good property of separation between signal and noise , wavelet analysis is introduced to the denoising of sound wave and vibration signals in this paper . the emphasis is placed on the contrasts filtering methods of several wavelets with that of tradition technique . thereout , conclusion obviously is that wavelet is better in filtering
由于小波变换具有良好的信噪分离能力，本文将小波理论引入到了声波振动信号去噪处理中，重点研究了几种常用的小波去噪方法和传统的滤波技术，通过对比分析证明了该方法的有效性。