To develop C++ filters that the program will load dynamically see the example filter in the plugins directory. The program will look for two functions:

void pixel(int x, int y, unsigned char *buffer);

void complete();

pixel is called once for every pixel in the frame and complete is called when every pixel has been drawn.

Currently program works best when ran in Video mode, I have not been able to test on host os of windows or linux, just a guest virtual machine. But in the VM webcam resolution is maximum of 640x480.

I believe there is a bug in current version of OpenCV where on OS X if you open a webcam capture device, close it then reopen a another it will cause the program to crash so I will have to wait until this is resolved before I can upload a complete working macOS version.

Screenshot from Windows

Screenshot for Linux

Screenshot for macOS