2工具使用 在工具箱中,打开/Extensions/Savitzky-Golay Filter 设置如下参数: 3接口调用 本工具只需安装在ENVI路径中后,便可以通过接口调用其功能。 格式如下: Task = ENVITask('ENVISavitzkyGolayFilterTask') Task.NLeft = 5 Task.Nright = 5 Task.Order = 0 Task.Degree = 2 Task.Output_Raster_URI ='...
有了PolyFit 函数就可以计算 SG 滤波器的系数了。 Matlab 中的 polyval 函数 可以用 gsl_poly_eval 来实现。 下面是具体的代码。 /** * 计算 Savitzky-Golay 滤波器系数 * SG 滤波器的阶数为 2M+1,多项式的最高次数为 N */ gsl_vector* SG_FilterCreate(int M, int N /* Poly Order */) { int ...
部分代码: %% Step 1 MWSG Filter % Compute the MWSG spectrogram for the given audio signal disp('Reading wav File'); [signal,fs]=audioread('../data/PC5_20090606_050000_0010.wav'); %% MLSP audio file % Parameters M=21; %Matrix length required to calculate SG coefficents P=3; %Order...
go.sgfilter;import static java.lang.Math.pow;import java.util.ArrayList; import java.util.Arrays; import java.util.List;import org.apache.commons.math.linear.RealMatrixImpl;/** * Savitzky-Golay filter implementation. For more information see...
SG filter will obtain a good tradeoff in waveform smoothing and valid signal preservation under suitable conditions. These are the appropriate window size and the polynomial degree. Through examples from synthetic seismic signals and field seismic data, we demonstrate the good performance of SG filter...
在Python中,可以使用scipy库中的savgol_filter函数来应用Savitzky-Golay过滤器。该函数的参数包括输入信号数据、窗口长度、多项式阶数等。以下是一个示例代码: 代码语言:txt 复制 import numpy as np from scipy.signal import savgol_filter # 定义输入信号数据 signal_data = np.array([1, 2, 3, 4, 5, 4, ...
def median_filter(data: pd.Series, window=5): return 1. 2. 3. 应用到数据上:中值滤波将高频拟合,其他数据也与源数据拟合程度一般 SG滤波器 对曲线进行平滑处理,通过Savitzky-Golay 滤波器,可以在scipy库里直接调用,不需要再定义函数。
This then raises the question: “How does an SG-filter's frequency-response affect polynomial regression; thus if the main-lobe and side-lobes could be shaped arbitrarily, what is the optimal frequency-response of an SG filter?”. These issues are considered in this paper. SG-filters are ...
Through examples from synthetic seismic signals and field seismic data, we demonstrate the good performance of SG filter by comparing it with the Wiener filtering and wavelet denoising methods. 展开 关键词: SG filter seismic random noise reduction synthetic seismic signals field seismic data ...
Compute the cutoff frequency for the SG filter using a sample rate of 1000 Hz. Get Fs = 1000; F3dB = Fs/(6.352*(nh+1/2)/(m+1.379) - ... (0.513+0.316*m)/(nh+1/2)); disp(F3dB/Fs) 0.0230 Compute the frequency response of the SG filter using 1024 DFT points. Plot the ...