Live data from Hacker News

Unpaired Image-to-Image Translation using Cycle-Consistent Adversarial Networks

junyanz.github.io

141–146 of 146 posts

Re: Unpaired Image-to-Image Translation using Cycle-Consistent Adversarial Networks

#141

I've only recently started reading about deep neural networks, and the thing that strikes me the most about the literature is the lack of mathematics . Open a NIPS paper from 2010 or so, and you'll see extremely dense mathematics: nonparametrics, variational approximation, sampling theory, riemannian geometry. But from my (admittedly small) sampling of the convnet / RNN literature there really doesn't seem to be much…

> The typical paper seems to run along the lines of "We tried this, and it worked".

This sounds like science to me, is "we tried this, and it worked" something to shy away from for some reason? Of course, it's super important to publish "we tried this, and it didn't work." But that's another topic altogether...

If less math really is a trend, do you see it as a bad thing? You didn't state it strongly, but you've hinted at that, and it seems like the replies assume that's what you're suggesting.

I love math and mathy papers, and I would still welcome a trend toward less math in papers in return for more effort spent on making simple ideas plain and easily understood. But academics don't always operate that way. Math in papers is often used to obscure simple ideas, sometimes on purpose, and sometimes it's an indicator that the author doesn't understand the domain clearly enough but still wants to sound smart. Sometimes a paper really requires dense math, but not very often. Dense math almost always makes a paper more difficult to reproduce. Either way it is harder for even experts to evaluate the quality of dense math than of expository writing that strives for simplicity and clarity.

Neural networks are really simple math under the hood, well understood algorithms and simple linear algebra, why not write great papers that work and don't re-hash the math but instead focus on clarity, reproducibility and results?

Re: Unpaired Image-to-Image Translation using Cycle-Consistent Adversarial Networks

#142
post #38
post #24

This has also been making the rounds, Deep Photo Style Transfer: https://github.com/luanfujun/deep-photo-styletransfer

Unfortunately, no one seems to be able to run it.

This person ran it on a hackintosh (I helped a little) https://github.com/luanfujun/deep-photo-styletransfer/issues...

Re: Unpaired Image-to-Image Translation using Cycle-Consistent Adversarial Networks

#143

I've only recently started reading about deep neural networks, and the thing that strikes me the most about the literature is the lack of mathematics . Open a NIPS paper from 2010 or so, and you'll see extremely dense mathematics: nonparametrics, variational approximation, sampling theory, riemannian geometry. But from my (admittedly small) sampling of the convnet / RNN literature there really doesn't seem to be much…

Wait until we have neural networks designing neural networks.

https://arxiv.org/abs/1606.02492 ^^

Disclaimer: I am the author

Re: Unpaired Image-to-Image Translation using Cycle-Consistent Adversarial Networks

#144

TIL - remap green pixels to grey/white and you go from summer to a contrived notion of winter. This done easily in Photoshop. - select green pixels, smooth it a bit, then paint white over it.. - apply a blue cast on it https://s17.postimg.org/q68dz04sf/test.jpg

Yes but I think you're missing the point that the neural network didn't need to be reprogrammed to specifically "winterize" the photos like your script did. It's much more general in its applications, and does a decent job no matter the lighting conditions etc.

I have doubts in how agnostic their solution is...

Re: Unpaired Image-to-Image Translation using Cycle-Consistent Adversarial Networks

#145
post #42

Earlier quoted context omitted.

/r/machinelearning asks how it's any different from DiscoGAN: https://www.reddit.com/r/MachineLearning/comments/62hzqc/r17... no answer so far.

Reply posted 11h after your comment: >All DiscoGAN experiments are on 64x64, this is high resolution. I don't know whether this is an important difference though.

I don't think it is. Working on 64x64 makes global coherence easier and the NNs smaller/faster but shouldn't make a qualitative difference. I believe one guy using DiscoGAN/CycleGAN on my current Danbooru anime dataset ( https://www.gwern.net/Danbooru2017 ) is doing it at 128px without any major changes.

Re: Unpaired Image-to-Image Translation using Cycle-Consistent Adversarial Networks

#146
post #141

I've only recently started reading about deep neural networks, and the thing that strikes me the most about the literature is the lack of mathematics . Open a NIPS paper from 2010 or so, and you'll see extremely dense mathematics: nonparametrics, variational approximation, sampling theory, riemannian geometry. But from my (admittedly small) sampling of the convnet / RNN literature there really doesn't seem to be much…

> The typical paper seems to run along the lines of "We tried this, and it worked". This sounds like science to me, is "we tried this, and it worked" something to shy away from for some reason? Of course, it's super important to publish "we tried this, and it didn't work." But that's another topic altogether... If less math really is a trend, do you see it as a bad thing? You didn't state it strongly, but you've hint…

I agree with everything you've said. But my suspicion is that there's less maths in the papers because no-one knows how to use it to analyse neural networks properly.

That means current research is operating via trial and error. One man's trial and error is another's blind search. Without maths to point researchers in the right direction, neural net research could easily hit a wall once the low-hanging fruit has been picked.

Post reply on HN