Send MIDI signals when the user moves. 
/**
* kaleidos_midiblob
* @author: Arnaud Juracek (@arnaudjuracek)
* @date: 2016-07-04
* @url: https://github.com/arnaudjuracek/processing-midiblob
*
* Persistence algorithm by Daniel Shifmann:
* http://shiffman.net/2011/04/26/opencv-matching-faces-over-time/
*
* Based on openCV Image filtering by Jordi Tost
* https://github.com/jorditost/ImageFiltering/tree/master/ImageFilteringWithBlobPersistence
*/Arnaud Juracek, GNU GENERAL PUBLIC LICENSE Version 3, 29 June 2007