butterworth-filter

A Java Library for Digital Signal Processing

C++ classes for designing high-order Butterworth IIR & equalization filters

Elegant Butterworth and Chebyshev filter implemented in C, with float/double precision support. Works well on many platforms. You can also use this package in C++ and bridge to many other languages for good performance.

Simple demo of filtering signal with an LPF and plotting its Short-Time Fourier Transform (STFT) and Laplace transform, in Python.

Engineering Toolkit for Java

An LTspice project which contains third-order Butterworth filters built both using an inductor and a current conveyor.

Digital signal processing library

Preprocessing, analysis and classification of EEG signals into 4 classes.

Comparison of IIR Notch Filter for removal of power line interference in ECG signal using MATLAB 2015a

Real-time FIR and IIR filters designed for use with vst's

In this project, low-pass filters and Kalman filters with different window function designs are used to denoise speech signals polluted in the full frequency band of Gaussian white noise

Blood pressure and heart rate measurement using smartphone video camera - 스마트폰 비디오 카메라를 활용한 혈압, 심박수 측정

Autonomous Agent Butterworth Infinite Impulse Response (IIR) Digital Low-Pass Filter Designer

Autonomous Agent Butterworth Infinite Impulse Response (IIR) Digital Low-Pass Filter Designer

Butterworth Infinite Impulse Response (IIR) digital filter design using Bilinear Transform and s-plane pole mapping

Butterworth Infinite Impulse Response (IIR) digital filter design using Bilinear Transform and s-plane pole mapping

Miscellaneous Time Series Filters: Christiano-Fitzgerald, Baxter-King, Hodrick-Prescott, Butterworth, and trigonometric regression filters

Image Filtering(Spatial Domain and Frequency Domain filtering)

It features tutorials on using the EEGLAB toolbox and MNE-Python, guiding users through the basics of EEG data handling, pre-processing, and artifact removal.

Camera-based real-time vital signs monitor using rPPG, DSP & LLMs — detects heart rate, HRV, and stress from a standard webcam. No sensors required.