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What makes you say Tesla is imitating humans? Their motion planning is all traditional robotics logic, not anything learned.
by jowday 5y ago
What makes you say Tesla is imitating humans? Their motion planning is all traditional robotics logic, not anything learned.
- robotresearcher 5y agoVision-based driving. Humans don't have lidar sensors.
- jowday 5y agoHumans don’t regress per-pixel depth or use convolutions and region proposals to draw bounding boxes around objects. They don’t function on models with fixed weights trained by backprop either. The idea that “vision only” somehow more closely resembles how humans drive quickly falls apart if you inspect the internals of these systems.
- upbeat_general 5y agoI think the comparison comes from the fact that humans infer a 3D map from stereo vision whereas LiDAR to some extent gives you the ground truth 3D map. You’re right that it falls apart pretty quickly though.
- jowday 5y agoExcept Tesla isn’t inferring a 3D map from stereo vision either, at least not outside of the front facing cameras - they’re using monocular depth prediction.
- robotresearcher 5y agoNeither are humans. Our eyes are so close together there's almost no disparity between the eye images beyond a handful of meters. We do 3D by inference beyond the near-field.
- robotresearcher 5y agoThe similarity is in the problem to be solved, not the details of the compute pipeline. Depth must be inferred somehow, rather than measured by actively interacting with the surface, as it is in LiDAR.
- jowday 5y agoIf you really wanted to make this argument, you wouldn’t even want to bother inferring depth, since that’s not what humans do, not directly at least. If you’re actually trying to obtain a depth map as part of your pipeline, LIDAR (or LiDAR + vision feeding into a denser depth prediction model) would always be a better strategy, cost aside, since determining depth from images is an ill posed problem.
- robotresearcher 5y agoMy claim is that humans use their eyes as a primary input for driving. I don't think it's controversial. We don't let eyeless people drive. Eyes do not shoot out lasers.
- astrange 5y agoHumans aren't just a stereoscopic camera - we can sense depth by knowing what things should look like, or by moving our head, or refocusing, or… Did you know we can see light polarization? https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4528539/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4528539/
- deleted 5y ago[deleted]
- robotresearcher 5y agoYou’re describing vision, and not LiDAR. We are in agreement.