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0 pointsjayjay719y ago0 comments

In theory, sure. But you're effectively saying computers have to process vision as well as humans, which some experts think is comparable to solving AI. I'm not saying Tesla won't make a lot of progress, but considering how many decades of research has gone into this very problem (I worked on it at Carnegie Mellon as a graduate student, and they've been doing it since the 80's) it will likely take longer than most people like to admit.

I actually don't know a single expert who thinks we're anywhere close to having a stage 4 autonomous vehicle. Most of the people I respect are pegging it at decades instead of years.

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12 comments · 5 top-level

jfoster9y ago· 4 in thread

I think you must mean that you don't know an academic expert who thinks we're close. The teams at Tesla must think it's achievable in the next few years.

jayjay71OP9y ago

Well I also used to work with the team that's now at Uber (I worked at the National Robotics Engineering Center which is where they got almost all of their initial 40 engineers), and some of the guys I used to work with went to Google as well as Tesla. Tesla has a retention problem - their top engineers regularly quit every few years. Google lost nearly their entire team working on self-driving cars because Sergey insisted on making a fully self-driving vehicle instead of rolling out incremental levels of autonomy.

If you're only reading article after article hyping the technology instead of talking to the people actually building it, of course you're going to believe the journalists instead of the engineers.

I don't know anybody actually writing the code that thinks we're close. Of course the PR teams and managers are going to hype everything up - that's their job.

laichzeit09y ago

Excuse my rather hand-waving explanations below but I'm not an expert in this field.

The guys you spoke to, was this before or after they went to Google/Uber? As I understand the approach at Tesla would be (a) collecting an enormous amount of real-world driving data that possibly others are not or have not done yet, (b) do as little "coding" as possible, but rather take a deep-learning approach. I.e. the "algorithm" gets better the more data you throw at it, it doesn't depend on human intelligence, but rather on how much data you collect. Similar to how Google Translate got so good (it's not good because of any linguistic model or because a team of linguists "coded" it, it's just good because of the sheer amount of data it was trained on). (c) they have enough money to throw at any hardware requirements for a platform that could train on such an amount of data.

Are the conditions above not different perhaps from what you experienced whilst working at NREC and perhaps different from the way you guys approached autonomous-driving? I'm trying to think from Elon Musk first-principles. If it was technically possible, what are all the lego blocks you need to go about building this?

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ams61109y ago

Or they want you to think that.

Matthias2479y ago

Or it's the marketing team and not the engineering team :-)

Animats9y ago· 2 in thread

Google is at stage 3 and getting close to stage 4 for slow (< 25MPH) vehicles. See Urmson's talk at SXSW, where he shows Google cars handling many unusual situations. (A woman in a powered wheelchair chasing a turkey with a broom is one example.) If you're willing to drive slow, more situations can be handled. It's not necessary to have as much sensor range, situations are less ambiguous, braking hard will resolve most problems, and predicting what's going to happen becomes less important.

At higher speeds, prediction becomes more of an issue. Will that car on the side street drive into the intersection, or not? At slow speeds, you can wait and see what they do. At higher speeds, you have to predict behavior. That's hard, but a machine learning problem.

jayjay71OP9y ago

This is with the caveat that the weather is nice and you're in one of Google's specially mapped areas. As I understand it - and I never worked at Google and I keep waiting for someone who does to correct me on it - those maps are very difficult to scale and maintain.

petra9y ago

The limited area/weather isn't a huge problem.commercially . You just need to start offering it in a single city when possible, prove the tech and business works , and than you could get tons of money to scale to other cities .

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xiphias9y ago· 1 in thread

Researchers already passed human level image classification performance in 2015.

https://arxiv.org/pdf/1502.01852.pdf

jayjay71OP9y ago

That's a really cool paper. While I wouldn't say they're doing better than a human (I really think they're twisting semantics with that one), it is impressive and I hope to see a lot more progress in this area. Thank you for sharing!

gnipgnip9y ago

Part of the problem I think is that the image is not fully used; I mean, generally these systems consist of a black-box routine that extracts interest points and then passes it onto to a SLAM routine, which inturn keeps an estimate of the car state and the interest point positions. There is no "physical" model of the world being inferred from images, and I imagine this makes things rather tricky (and also why a LIDAR is so much more useful).

AFAIK deep-learning hasn't really brought much change to this manner of doing things - the mapping part esp.

davedx9y ago

What do you make of this?

https://www.tesla.com/nl_NL/videos/full-self-driving-hardwar...

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12 comments · 5 top-level

jfoster9y ago· 4 in thread

I think you must mean that you don't know an academic expert who thinks we're close. The teams at Tesla must think it's achievable in the next few years.

jayjay71OP9y ago

If you're only reading article after article hyping the technology instead of talking to the people actually building it, of course you're going to believe the journalists instead of the engineers.

I don't know anybody actually writing the code that thinks we're close. Of course the PR teams and managers are going to hype everything up - that's their job.

laichzeit09y ago

Excuse my rather hand-waving explanations below but I'm not an expert in this field.

2 more replies

ams61109y ago

Or they want you to think that.

Matthias2479y ago

Or it's the marketing team and not the engineering team :-)

Animats9y ago· 2 in thread

jayjay71OP9y ago

petra9y ago

1 more reply

xiphias9y ago· 1 in thread