License BSD 2-Clause

DiFi++ is a small c++ header-only library for DIgital FIlters based on rational transfer functions such as the butterworth filter and the moving average filter. DiFi++ is using the Eigen library for math computations.

The implementation is based on well written article from Neil Robertson. Please check out the followings

• Butterworth filter

• Highpass filters

• Bandpass filters

• Band-reject filters

and the differentiators from Pavel Holoborodko

The library has been tested against Matlab results.

A doxygen documentation is generated when compiling.

This is an header-only library so there is nothing to compile (but the documentation)

git clone --recursive https://github.com/vsamy/DiFi++
cd DiFi++
mkdir build
cd build
cmake ..
make install

The method used is close but somewhat different from Matlab methods and Butterworth band-reject has quite different results (precision of 1e-8).