Facebook open-sources Detectron • Hacker News Board

Re: Facebook open-sources Detectron

#81

Post by kurtisc » Tue, Jan 23, 2018, 9:41 AM UTC

megous wrote: post #7

So is this the end of Google captchas asking for where the car/sign/whatever is? Will there be a final battle of AIs, where they will kill each other, and the unfettered access to websites over VPN/tor wins and laughs the last laugh?

For the car captchas, I've found actually clicking all the boxes with part of a car will always be a wrong answer (distinct from when it just makes you answer twice). Instead, you have to click on the squares that you know it thinks are cars.

This creates a twisted Turing test situation where, to prove you are a human, you have to pretend to be a machine's idea of what a human is.

Re: Facebook open-sources Detectron

#82

Post by yorwba » Tue, Jan 23, 2018, 9:56 AM UTC

JepZ wrote: post #45

Anybody knows a way to run CUDA programs with the open source driver (nouveau)?

CUDA needs driver support to talk to the GPU, and since it is proprietary nVidia technology, the open-source driver can't support it. So either you run the nVidia driver or you have to use OpenCL.

Re: Facebook open-sources Detectron

#83

Post by js8 » Tue, Jan 23, 2018, 10:03 AM UTC

kurtisc wrote: post #81

megous wrote: post #7

So is this the end of Google captchas asking for where the car/sign/whatever is? Will there be a final battle of AIs, where they will kill each other, and the unfettered access to websites over VPN/tor wins and laughs the last laugh?

For the car captchas, I've found actually clicking all the boxes with part of a car will always be a wrong answer (distinct from when it just makes you answer twice). Instead, you have to click on the squares that you know it thinks are cars. This creates a twisted Turing test situation where, to prove you are a human, you have to pretend to be a machine's idea of what a human is.

That was my experience with car and sign captchas as well..

But interestingly, it also depends on my mood, when I feel lazy, I click fewer boxes.

Re: Facebook open-sources Detectron

#84

Post by nannal » Tue, Jan 23, 2018, 10:05 AM UTC

Jaruzel wrote: post #79

jraph wrote: post #55

Earlier quoted context omitted.

Has someone ever tried to submit images from Google captchas to Google Images? An answer like "This is definitely a sign" from Google Images would be funny.

I just tried it: http://www.jaruzel.com/files/streetsign.jpg :)

Your SSL cert is for the wrong domain.

Re: Facebook open-sources Detectron

#85

Post by Jaruzel » Tue, Jan 23, 2018, 10:06 AM UTC

nannal wrote: post #84

Jaruzel wrote: post #79

Earlier quoted context omitted.

I just tried it: http://www.jaruzel.com/files/streetsign.jpg :)

Your SSL cert is for the wrong domain.

Your https-everywhere is doing it wrong. I don't have an SSL on my personal site (no requirement to). I do have SSL on other domains that share that IP however.

Re: Facebook open-sources Detectron

#86

Post by gldalmaso » Tue, Jan 23, 2018, 10:08 AM UTC

m_ke wrote: post #42

yters wrote: post #40

Is there a class of math problem humans can solve but computers cannot? Then we could just use these problems as a guaranteed test instead of the current CAPTCHA arms race.

There is no arms race. 99.9% of the time Google knows if you're a robot based on your browser state. They make you label the images because it's a free way to get training data.

I see this argument a lot and considered it the case to, but I have to wonder if that really is the case. Wouldn't google be empowering people to really mess up their training data?

If I'm trying to automate a system to fool their captcha, I'm probably getting a lot of bad results. Or I could just be intentionally feeding them bad data, the fact that not being allowed through captcha keeps letting me make more and more inputs would enable someone to do that as long as they would like to.

I don't know, maybe I'm missing something.

Re: Facebook open-sources Detectron

#87

Post by jph00 » Tue, Jan 23, 2018, 10:26 AM UTC

schrep wrote: post #21

m_ke wrote: post #17

Earlier quoted context omitted.

Not that much worse than what you see on imagenet. Most large companies have internal datasets with >100 million images. https://arxiv.org/abs/1610.02357

That’s impressive work. Still don’t think we have reached human level for all the categories of things we see in images. But you are correct that my comment about 1k categories is not true for many production systems.

Whilst there are plenty of things in CV that computers aren't super-human at yet, object classification (given 100+ examples) is not one of them. In datasets with tens of thousands of categories, humans are much worse than computers - e.g. humans are really not good at knowing the difference between every type of mushroom, algae, and model of airplane.

Further, nearly every time a computer recently has been trained to do some very nuanced classification, such as in radiology, they exceed human expert performance.

(Outside of classification, computers are rapidly making progress - for instance they are getting surprisingly good at predicting the next few frames of a video, which requires a lot of "world knowledge" to do correctly.)

Re: Facebook open-sources Detectron

#88

Post by Spare_account » Tue, Jan 23, 2018, 10:26 AM UTC

Jaruzel wrote: post #85

nannal wrote: post #84

Earlier quoted context omitted.

Your SSL cert is for the wrong domain.

Your https-everywhere is doing it wrong. I don't have an SSL on my personal site (no requirement to). I do have SSL on other domains that share that IP however.

I'm not expert on this but what I'm seeing is that port 443 is serving up a response when jaruzel.com is requested on that port. While you may not be actively advertising that domain with https URLs, it is valid for clients to request one speculatively.

There isn't a valid cert for that domain and for some reason for server is offering a different one. Presumably you need to unbind 443 from that host header name (this is based on memories of configuring IIS a decade ago).

Re: Facebook open-sources Detectron

#89

Post by kurtisc » Tue, Jan 23, 2018, 10:35 AM UTC

franciscop wrote: post #36

Does anyone know an alternative that works on RaspberryPi? This states: "Detectron operators currently do not have CPU implementation; a GPU system is required." Even low FPS (3-5) would be acceptable.

FWIW, A Pi does have a GPU with a full OpenGL ES implementation. However, this requires NVIDIA CUDA.

Re: Facebook open-sources Detectron

#90

Post by [deleted] » Tue, Jan 23, 2018, 10:39 AM UTC

m_ke wrote: post #42

yters wrote: post #40

Is there a class of math problem humans can solve but computers cannot? Then we could just use these problems as a guaranteed test instead of the current CAPTCHA arms race.

There is no arms race. 99.9% of the time Google knows if you're a robot based on your browser state. They make you label the images because it's a free way to get training data.

[deleted]