3 ms·
I wonder how hard it would be to engineer a material that you can put on top of the hidden camera lens that would greatly diffuse the specific frequency range o
by woeirua 5y ago
I wonder how hard it would be to engineer a material that you can put on top of the hidden camera lens that would greatly diffuse the specific frequency range of light that these ToF sensors use while permitting mostly visible light through? If so, it might be possible to defeat this approach relatively easily.
Looking at what the DL filter is doing, I wonder how well this really generalizes. It seems that many of those examples are virtually indistinguishable to a human (hence the high false positive rate for the naked eye experiments).
- jcun4128 5y agoBring a 360 degree projector, up the ante
- frizensami 5y agow.r.t the material, it seems to be possible, since ToF sensors operate in a narrow 850 nm band. However, I don't know if a coating can be made that also doesn't overlap with the visible light range since 850 nm is somewhat close to red light, or whether that would be cheap if so (given that the hidden cameras themselves are only $1 at the moment). I also have similar reservations about the DL approach in general. What makes me more confident is that we trained on a relatively small number of objects (~10) and tested on a totally different set of 30 objects. We're also using very small regions-of-interest as inputs (5x5), so there's little to no overfitting on the environment or objects themselves.