bandpass butterworth filter implementation in C++

Question

I am implementing an image analysis algorithm using openCV and c++, but I found out openCV doesnt have any function for Butterworth Bandpass filter officially. in my project I

Answer 1

There are code which could be found online implementing butterworth filter. If you use the source code to try to get result matching MATLAB results, there will be the same problem.Basically the result you got from the code hasn't been normalized, and in the source code there is a variable sff in bwhp.c. If you set that to 1, the problem will be easily solved. I recommend you to use this source code and the source code and usage could be found here