Re:Lidar Is a Crutch
by trhway on Thursday January 31, 2019 @02:14AM
(#19043053)
>Humans also have 576 MP quality eyes
yep, resulting rich details simplify stereo matching a lot. Instead of complicated algorithm it allows our brain to just run simple displacement match in extremely parallel fashion natural to the brain.
>The idea that you can throw a cheap camera in a car and think you can achieve the same always seemed strange to me.
it isn't strange, it is just a bit early. Running 1MP stereo on a single core P4 in 2004 was just pitiful. These days a 20MP sensor costs under $30 and 16-32 cores is having much better time with it (using GPU is much cheaper and several times faster - it is just that i have these workstations around with good CPUs and no GPU to speak of. Tesla for example does run powerful GPU for their cameras.) So, scroll forward another 15 years, and we'll have nice stereo with something like 200MP sensors. I honestly don't see how lidar can do even just 4MP at minimally usable 30FPS in any foreseeable future (as probing at 150m is 1 microsecond per pixel).
yep, resulting rich details simplify stereo matching a lot. Instead of complicated algorithm it allows our brain to just run simple displacement match in extremely parallel fashion natural to the brain.
>The idea that you can throw a cheap camera in a car and think you can achieve the same always seemed strange to me.
it isn't strange, it is just a bit early. Running 1MP stereo on a single core P4 in 2004 was just pitiful. These days a 20MP sensor costs under $30 and 16-32 cores is having much better time with it (using GPU is much cheaper and several times faster - it is just that i have these workstations around with good CPUs and no GPU to speak of. Tesla for example does run powerful GPU for their cameras.) So, scroll forward another 15 years, and we'll have nice stereo with something like 200MP sensors. I honestly don't see how lidar can do even just 4MP at minimally usable 30FPS in any foreseeable future (as probing at 150m is 1 microsecond per pixel).