APIDIS
# Data
Approximatively 2 hours of videos were captured from 7 viewpoints during a professional basketball game.
Raw data
The cameras were recording at almost 22 fps in average, with a resolution of 1600x1200 pixels. The video files are available in their native format, i.e. one motion jpeg file (~300 MB) per minute per camera.
Pseudo-synchronised video
A pseudo synchronised dataset is provided by resampling the raw videos at 25 fps (using the closest available frame) with a resolution of 800x600 pixels. The video files are available as one MPEG-4 file (between 28 MB and 56 MB) per minute per camera. For optimal timestamps accuracy, the original dataset should be prefered.
# Annotations
Timestamps
All timestamps are expressed in seconds since Epoch when provided as integers. When provided in a human readable format, e.g. in filenames, they follow the <a href="http://en.wikipedia.org/wiki/ISO_8601">ISO 8601</a> date/time syntax.
Calibration
All cameras are <a href="http://www.arecontvision.com/">Arecont Vision</a> AV2100M IP cameras (<a href="http://www.arecontvision.com/resources.php?pid=106">datasheet</a>). The fish-eye lenses used for the top view cameras are <a href="http://www.fujinon.com">Fujinon</a> FE185C086HA-1 lenses (<a href="http://www.fujifilmusa.com/products/optical_devices/security/fish-eye/5-mp/fe185c086ha-1/">datasheet</a>). Each camera was indivually calibrated into a common world coordinate system.
Additional annotations
Several manually annotated objects are provided (see NEM'08 summit paper):
- Basket ball events like ball possession periods, throws, violations ; for the whole basketball game
- Ball, Players and referees position ; for one minute of the game.
Annotated events and salient-objects are recorded into two kinds of XML files whose syntax is described in the XML Schema Definition (xsd) files apidis-annotation-ver23.xsd and apidis-salientobj-ver1.xsd. A simplified structural diagram of event xml files is illustrated in event-xml-simple.png.
The tags for describing the detected objects and their properties are illlustrated in salient-obj-xml.png.
Ball was annotated in the 2D images on every camera where it was visible. An approximate 3D localization is inferred for the pseudo-synchronized dataset.
# Terms of use:
This dataset is available for non-commercial research in video signal processing only. We kindly ask you to mention the APIDIS project when using this dataset (in publications, video demonstrations...).
# Acknowledgements
We would like to thank Jean-François Prior (<a href="http://www.belfiusnamurcapitale.be/">Dexia Namur</a> basket ball team), Philippe Delmulle <a href="http://www.dbcwaregem.be/">Declercq Stortbeton Waregem</a> basket ball team) and the city of <a href="http://www.namur.be/">Namur</a> for their authorisations and technical help collecting this dataset.