Mean-Shift tracking is a popular algorithm for object tracking since
it is easy to implement and it is fast and robust. In this paper, we address the
problem of scale adaptation of the Hellinger distance based Mean-Shift tracker.
We start from a theoretical derivation of scale estimation in the Mean-Shift framework.
To make the scale estimation robust and suitable for tracking, we introduce
regularization terms that counter two major problem: (i) scale expansion caused
by background clutter and (ii) scale implosion on self-similar objects. To further
robustify the scale estimate, it is validated by a forward-backward consistency
check.
The proposed Mean-shift tracker with scale selection is compared with recent
state-of-the-art algorithms on a dataset of 48 public color sequences and it achieved
excellent results.