Preliminaries

Steps

To track objects of interest appearing in a video, the main steps are:

1. Camera calibration

2. Video preprocessing (based on the camera calibration)

3. Object detection (based on the preprocessed video)

4. Object tracking (based on the detections)

Each of these tasks correspond to one or more arena- binaries, depending on the data, the use case, and the adopted approach.

Command-line arguments

• Each arena- binary supports the --help option, which displays the list of supported arguments.

• Most of the arena- binaries depend on intrinsic and/or extrinsic camera parameters. loaded from an input JSON file (--camera).

  • In general, these parameters are loaded from an input JSON file (--camera). Such a JSON file is generated using arena-calibrate.

  • For the Arena use case, if --camera is not supplied, camera parameters can be loaded from the arena itself. The camera position is inferred from the input video filename. Then, the arena package loads the corresponding camera parameters.

Video player

When an arena- plays a video:

• press Space to pause the video;

• press Esc to quit the video.