ΑΙhub.org
 

Analysing ice hockey videos with deep learning

by
12 November 2021



share this:
Ice hockey match

Researchers at the University of Waterloo are developing technology to automatically analyse videos of hockey games using artificial intelligence. Their deep-learning technique can identify players by their sweater numbers with 90 percent accuracy.

“That is significant because the only major cue you have to identify a particular player in a hockey video is jersey number,” said Kanav Vats, a PhD student in systems design engineering who led the project. “Players on a team otherwise appear very similar because of their helmets and uniforms.”

Player identification is one aspect of a complicated challenge as members of the Vision and Image Processing (VIP) Lab at Waterloo work with an industry partner on AI software to analyse player performance and produce other data-driven insights.

The researchers built a data set of more than 54,000 images from National Hockey League games – the largest data set of its kind – and used it to train AI algorithms to recognize sweater numbers in new images.

Accuracy was boosted by representing the number 12, for instance, as both a two-digit number and two single digits, 1 and 2, put together, an approach known in the field of AI as multi-task learning.

“Using different representations to teach the same thing can improve performance,” Vats said. “We combined a holistic representation and a digit-wise representation with great results.”

The research team is also developing AI to track players in video, locate them on the ice and recognize what they are doing, such as taking a shot or checking an opposing player, for integration in a single system.

Detailed analytics have made great strides in hockey and other sports in recent years, but much of the work is still done by people watching broadcast video and taking notes.

“As you can imagine, a person manually annotating video of a full hockey game of three periods would take hours,” Vats said. “Machine-learning systems can produce data from videos in a matter of minutes.”

While they have focused so far on hockey, the researchers expect their technology could be transferred with modifications to other team sports, such as soccer.

Vats collaborated on the player identification work with his doctoral supervisors, Waterloo engineering professors David Clausi and John Zelek, and postdoctoral fellow Mehrnaz Fani.

He presented a paper, Multi-task learning for jersey number recognition in Ice Hockey, at the 4th International ACM Workshop on Multimedia Analysis in Sports in October 2021.



tags:


University of Waterloo




            AIhub is supported by:


Related posts :



Watch the sessions from AI UK

The recordings of the sessions from the AI UK conference are now available for all to watch.
16 May 2022, by

Launch of a new standard for AI security in Singapore

The standard aims to guide AI practitioners in dealing with malicious attacks on AI systems.

Using deep learning to predict physical interactions of protein complexes

A computational tool developed to predict the structure of protein complexes is providing new insights into the biomolecular mechanisms of their function.
podcast

New voices in AI: human-AI collaboration, with Nicolo' Brandizzi

We talk to Nicolo' Brandizzi about his work on human-AI collaboration.
11 May 2022, by

ACM SIGAI Industry Award 2022 nominations

Find out how you can make a nomination for the ACM SIGAI Industry Award - deadline 31 May 2022.
10 May 2022, by

Forthcoming machine learning and AI seminars: May 2022 edition

A list of free-to-attend AI-related seminars that are scheduled to take place between 9 May 2022 and 30 June 2022.
09 May 2022, by





©2021 - Association for the Understanding of Artificial Intelligence


 












©2021 - ROBOTS Association