US Patent 10015445 Room conferencing system with heat map annotation of documents

A method includes capturing a first image at a first time using a camera; processing the first image to identify a representation of an object in the first image; storing the first image as an event forming a navigable marker in a conference room tracking system; measuring one or more of a room sound and a room activity level at a time associated with capture of the first image; generating a heat marker representing a level of the room sound or the room activity level; and storing the heat marker in association with the event.