Engineering Commons^™

Object Position Labelling In Video Using Prbs Audio Multilateration, Padraic Mcevoy, Paul Leamy, Damon Berry, David Dorran, Ted Burke

Session 4: 2D, 3D Scene Analysis and Visualisation

Supervised machine learning approaches for tracking objects’ positions in video typically require a large set of images in which the positions are labelled. Human labelling is time-consuming and automatic position labelling using visual markers is generally not possible because visible markers would corrupt the data. Here, we present an approach in which an object is tracked using a hidden tag that emits a PRBS audio signal. Four microphones arranged in a planar cross formation capture parallel recordings of the PRBS signal. Multilateration, using the time difference of arrival (TDoA) of the PRBS at each microphone, is used to estimate the …