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dmurray 10 hours ago

A year ago this [0] table tennis robot backed by Google DeepMind was discussed on HN.

It plays much worse and the HN discussion is anchored around whether it's OK to call it "human-level" or if the authors should have clarified that they meant a human who doesn't actually play table tennis. But it was accepted as being SOTA at that time.

What happened since then? This looks like the kind of level of advance we see in, say, coding AIs, but I thought physical robotics was advancing much more slowly.

A partial answer is that the new robot cheats in ways that DeepMind didn't seem to. It has high speed cameras all over the room and can detect spin by observing the logo on the ball. But I'm not sure this explains such a big advance.

[0] https://news.ycombinator.com/item?id=43861207

hermitcrab 6 hours ago | parent | next [-]

As a human player (of a not-high standard) I cannot see the spin of the ball directly. I can only infer it from the movement of my opponents bat. So I would wonder that a camera could pick it up in real time.

Also IT'S TABLE TENNIS, NOT PING PONG!

throwup238 4 hours ago | parent | next [-]

> Also IT'S TABLE TENNIS, NOT PING PONG!

Alas HN has finally found its next religious war!

I’ve been feeling a little bored after that whole tabs vs spaces one was settled.

user3939382 2 hours ago | parent [-]

Settled how? Tabs win, right?

scythe an hour ago | parent [-]

go fmt

james_marks 37 minutes ago | parent | prev | next [-]

Ping Pong is what you play for fun in the basement. The competitive sport is Table Tennis.

paolovictor 2 hours ago | parent | prev | next [-]

To be honest, if Chinese folks are fine with calling it "ping pong" (乒乓), I'm fine, too.

(Also, you sorta can infer the spin from the ball arc or even if you catch a glimpse of the rotating label)

mcmoor 2 hours ago | parent [-]

Lmao the character used is so cute

segmondy 2 hours ago | parent | prev | next [-]

It's ping pong.

hermitcrab 6 hours ago | parent | prev | next [-]

According to this video it can read the spin:

https://www.youtube.com/watch?v=EH8kZDc7OLk

neosat 4 hours ago | parent | prev | next [-]

As a player myself, and having seen much higher level player than me, reading the spin from the ball rotation (and in fact trajectory) of the ball is a common (if advanced) skill. Sometimes the movement of the bat can be deceptive (since with the same movement, where it contact on the bat, the finger pressure can affect the spin).

For example, backspin/underspin balls will move slower after the first bounce and feel 'damper' while topspin will jump. So it's def. possible (and in fact reliable) to read the spin from the spin and trajectory of the ball.

QuantumGood 4 hours ago | parent [-]

Visually reading spin is unreliable at all levels; the ITTF passed the two-color rubber rule requiring one black and one red side to neutralize players taking advantage of their opponents being unable to read the spin from watching the ball rotation via twiddling rackets with the same color rubber on both sides, but different characteristics.

stavros 3 hours ago | parent [-]

I can't parse that sentence, can you please clarify?

QuantumGood 2 hours ago | parent | next [-]

Apologies! I left a much clearer edit on screen, and when I noticed I had not commited it, the edit window had closed.

thatguy0900 2 hours ago | parent | prev [-]

Ping pong paddles have two sides, with different characteristics for each side. Now the two sides have to have different colors so your opponent can see what you are hitting it with, where before you could use the same color on both sides and your opponent wouldn't be able to tell how the ball would react

stavros an hour ago | parent [-]

Thanks!

bombcar 4 hours ago | parent | prev | next [-]

It’s miniature table pickleball.

dataflow 4 hours ago | parent | prev | next [-]

> Also IT'S TABLE TENNIS, NOT PING PONG!

Is it also MOVING STAIRCASE, NOT ESCALATOR?

davebren 4 hours ago | parent | prev | next [-]

The ball trajectory gives the spin

BrandoElFollito 5 hours ago | parent | prev [-]

I had a look at Google trends for France. Table tennis is slightly more common than ping pong but the latter is much more stable. Table tennis has huge peaks, the biggest one being during the OG in Paris. These parks are not reflected in there ping pong trend

Interestingly, for Youtube searches this is the other way, with a much bigger difference in favour to ping pong

aaron695 4 hours ago | parent | prev [-]

[dead]