TraX: Visual Tracking eXchange Protocol

This report motivates the TraX communication protocol as well as specifies its first iteration. TraX protocol is a simple protocol that was designed to make automatic evaluation of visual tracking algorithms quick, easy and independent of the choice of programming language, availability of source code or even the target operating system. It integrates with existing tracker implementations with little additional work and enables communication with external evaluation tools in order to perform objective evaluation experiments. In addition to the protocol specification we provide a reference implementation of the protocol in several popular programming languages that makes the protocol even easier to use.