frequency-domain filtering

基本解释

Then the system model of the traditional time-domain LMS and frequency-domain block LMS adaptive filtering algorithm was built.
然后对时域传统LMS自适应滤波算法和频域块LMS自适应滤波算法进行系统建模；
Secondly a block-based frequency-domain LMS adaptive filtering algorithm was introduced and analyzed based on the traditional time-domain algorithm.
其次在时域传统算法的基础上引出一种基于频域的块LMS自适应滤波算法，并完成其性能分析；
We first employed the unsharp masking to adjust the contrast of angiograms, and then removed the consistent component of low frequency in frequency domain by high-pass filtering.
首先采用反锐化滤波器对血管造影图像进行对比度调整，然后通过频域高通滤波去除背景中的一致性成分。