This video shows how I can set and control a filter's parameters via MIDI mapping, creating a control surface via a webcam and a torch.

I realized a little Processing sketch that tracks the light blob I shot in front of webcam, normalizes X and Y coordinates to MIDI acceptable values, and then sends them to a filter effect in Ableton Live.

I also realized the little control panel that allows to correctly make the MIDI mapping and set some blob detection's params.

My toolkit:
Processing
MIDI: theMidiBus Processing's library
blob detection: openCV Processing's library
GUI: controlP5 Processing's library
Ableton Live

Hope you enjoy it :D (less info)