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The Toronto Raptors, SportVU cameras, and the NBA's analytical revolution

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21–30 of 31 posts

Re: The Toronto Raptors, SportVU cameras, and the NBA's analytical revolution

#21
post #13

Earlier quoted context omitted.

I'm wondering why the 15 other teams aren't on board yet. If the price is only 100k, it's nothing to an NBA team. If those other 15 teams don't already have an advanced analytics team in place, then it makes sense not to have the camera until you have a structure in place to make sure of the camera data. It will be interesting with this huge push in basketball over the past couple years to see where this type of anal…

I completely agree, but, as referenced in the article, there is still pretty strong resistance to analytics-driven decision making in the NBA. Many NBA coaches and GM's are former players, who generally resist advanced stats. Hence "it can't measure personality, chemistry, heart." That quote fails to mention neither can anything else, so it makes much more sense to focus on what can be measured than on what can't (I'…

Forget the advanced stats, it also elucidates the best defensive/offensive scheme for the team. That's part of a coach's job description right there. It's probably also not much of a stretch to encroach on the scouts' & GM's territory too - How will our team look if we trade Lopez for Howard? - for example.

When the system gets more optimized and easier to use, the role of a coach & GM could get diminished, and with it, their salaries. Of course they would do everything in their power to stop that.

Re: The Toronto Raptors, SportVU cameras, and the NBA's analytical revolution

#22

Great article. As a huge NBA & NFL fan, It's intriguing to see the front offices of some of these teams begin to think outside of the box when it comes to player development. I think that's the most interesting opportunity here -- the practice of "watching film" is now innovative enough to not only help prepare for opponents, but also provide coaches a better macro view of what to work on with specific players in the…

Btw. Shane Battier (back then with the Rockets) was mentioned in a new york times piece on NBA and Stats some years ago: http://www.nytimes.com/2009/02/15/magazine/15Battier-t.html?...

Re: The Toronto Raptors, SportVU cameras, and the NBA's analytical revolution

#23
post #2

The "ghost" players in these animated replays that show where the system thinks a player should have been are fascinating to see. I wonder how automatic it is - if games could be analyzed like that without much expert input, this would be a really cool thing to have for recreational teams who want to get better but can't afford expert coaching. I'm thinking my late-night adult league hockey team would probably benefi…

I'd be pretty curious about that too. I actually tried doing something semi-similar before. My goal was to simulate a basketball game by having every player take an action based on "expected points per possession". So if you are covered tightly but a shooter is open, your expected points would be high for passing but low for shooting. This would then be done recursively for every decision, continuously looking ahead…

http://en.wikipedia.org/wiki/Markov_decision_process for a start.

Re: The Toronto Raptors, SportVU cameras, and the NBA's analytical revolution

#25
post #19

Wow, memories. In 1998 I worked on the FIFA World Cup graphics, and two guys on the team were developing a camera player tracking and stat acquisition system. Back then, raw CPU power was a real limitation; the fastest PCs were PII 333 Mhz and they just couldn't track automatically 22 players from 4 cameras (one atop each corner of the stadium). In the end the system was almost working, however we needed two people w…

Some former classmates of mine are still working on it, they provide analytics for the Uruguay soccer team among others:

http://www.kizanaro.com/web/index.php?lang=en

most of the input is still manual as you mention.

They were recognized by MIT Technology Review :) (in Spanish)

http://www.technologyreview.es/tr35argentinayuruguay/profile...

Re: The Toronto Raptors, SportVU cameras, and the NBA's analytical revolution

#26
post #21

Earlier quoted context omitted.

I completely agree, but, as referenced in the article, there is still pretty strong resistance to analytics-driven decision making in the NBA. Many NBA coaches and GM's are former players, who generally resist advanced stats. Hence "it can't measure personality, chemistry, heart." That quote fails to mention neither can anything else, so it makes much more sense to focus on what can be measured than on what can't (I'…

Forget the advanced stats, it also elucidates the best defensive/offensive scheme for the team. That's part of a coach's job description right there. It's probably also not much of a stretch to encroach on the scouts' & GM's territory too - How will our team look if we trade Lopez for Howard? - for example. When the system gets more optimized and easier to use, the role of a coach & GM could get diminished, and with…

Except for the coaches who embrace it. When the Mavericks hired Rick Carlisle, a big reason they hired him was that in Indiana he had consistently used his teams best lineups, and in his interviews expressed a strong interest in embracing analytics (which, with Mark Cuban as your owner, you won't ever lack the resources to get the best analytics). In baseball, the best (in terms of wins/resources) team is the Rays, who hired investment bankers as their GM and have a coach who listens to the sabermatricians, platooning like crazy and shifting the infield all over.

Re: The Toronto Raptors, SportVU cameras, and the NBA's analytical revolution

#27
post #13

Earlier quoted context omitted.

Unfortunately the cameras are pricey enough that only 15 of 30 NBA teams have purchased them, not to mention the half decade of work it took the Raptors to build the code to actually generate the visualizations. Maybe someday it will be commercially available and affordable, but that day seems a long way off to me.

I'm wondering why the 15 other teams aren't on board yet. If the price is only 100k, it's nothing to an NBA team. If those other 15 teams don't already have an advanced analytics team in place, then it makes sense not to have the camera until you have a structure in place to make sure of the camera data. It will be interesting with this huge push in basketball over the past couple years to see where this type of anal…

>I'm wondering why the 15 other teams aren't on board yet. If the price is only 100k, it's nothing to an NBA team. If those other 15 teams don't already have an advanced analytics team in place, then it makes sense not to have the camera until you have a structure in place to make sure of the camera data.

As someone who is on the periphery of working in a professional sport in both analytics and player development, the simple answer is the fact that market forces are comparatively weak here. You have monopolies with a ton of inertia in doing things the same way, plus a lot of the decision-makers are luddites in nature who think the human element is the single most important factor.

Times are changing as the economics of sports tightens and becomes more efficient, but it's not like there are ways to disrupt the market openly. The Dallas Mavericks (Cuban) and the Houston Rockets (Morey) are the ones leading the charge in the NBA, just like the Oakland Athletics (Beane), Cleveland Indians (Shapiro), and Tampa Bay Rays (Friedman) led the charge in MLB.

Re: The Toronto Raptors, SportVU cameras, and the NBA's analytical revolution

#28
that is some really cool tech. I wonder if the camera reads the player's numbers on their jerseys when they go onto the court?

I could imagine a cool realtime consumer version of this for all kinds of sports where you get an instant replay type of thing projected onto some kind of madden/video game type avatars: unpause and play any game from any instant in the game you're watching.

Re: The Toronto Raptors, SportVU cameras, and the NBA's analytical revolution

#29
post #24

As a long-time Raptors fan and the co-founder/owner of the most read Raptors blog, I can confirm that none of this technology has helped the Raptors.

Seems to me like too many players in the Raptors are lacking stamina for such an intense defense system as that system produces. They would be gassed in no time.

Re: The Toronto Raptors, SportVU cameras, and the NBA's analytical revolution

#30
post #4

The camera presumably is overhead. From that perspective, what could be a useful feature for person tracking? I am assuming it wont be that easy to pickup just numbers of their jerseys. Faces are also not easy to get from that angle. Or do they have multiple cameras in place?

probably use 2 - 3 camera to triangluate location if you only have to idenitify 24 people, you could probably do that on height plus some other physical dimension

Or with some Machine Learning: Identifying Players in Broadcast Sports Videos using Conditional Random Fields, CVPR 2011.
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