  Visual tracking algorithms are naturally adopted in various applications,
there have been several benchmarks and many tracking algorithms, more expected
to appear in the future. In this report, I focus on single object tracking and
revisit the details of tracker evaluation based on widely used OTB\cite{otb}
benchmark by introducing a simpler, accurate, and extensible method for tracker
evaluation and comparison. Experimental results suggest that there may not be
an absolute winner among tracking algorithms. We have to perform detailed
analysis to select suitable trackers for use cases.
