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This isn't my area of expertise, but I've spoken to computer vision researchers who apparently use generated data for training models for self-driving vehicle a
by fractionalhare 6y ago
This isn't my area of expertise, but I've spoken to computer vision researchers who apparently use generated data for training models for self-driving vehicle autonomy. Maybe they only use generated data for the train set and then do cross-validation on real data? I'd like to hear them chime in on this thread if any are reading here.
Theoretically speaking if the generated data has the same distribution and parameters as the real data [1], and encodes similar nonparametric features like seasonality and user activity, I think generated data might be fine. [2]
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1. Admittedly tricky if you have limited data and no insight into the underlying population distribution/features, just those of the sample. But then you have a worse problem for modeling diagnostics anyway.
2. In the sense that anything is "fine", which is a spectrum that requires some critical skepticism in statistics. There are always caveats but it may still be robust and useful.
- levesque 6y agoYou could kickstart training on simulators and then do a transfer, i.e. make adjustments to your final model, on real world data. But to learn only on generated data the problem boils down to the nonparametric features you will be using to state that the generated data is similar to the real data. What is a complex enough feature to say that images are equivalent? They might be statistically equivalent according to your features, but are they really? I think this is a very hard problem, because if we did have a good answer to this question then Tesla & co. would already be training their models on perfect simulators and we wouldn't see the glitches currently found in autonomous driving applications.
- fractionalhare 6y agoThat's what I figured, re: transfer modeling. Thanks for chiming in.