4 ms·

Those signs are 4 meters above ground level. You're saying that that can't/shouldn't be taken into consideration? They're not at all in front of any car...

Retric 9y ago
But how can you tell they are 4 meters above the ground level. Nothing in the image directly shows the last row of signs are that high off the road. We can say they are not close enough to be a problem yet, but all I am pointing out is it's a harder problem than your thinking about with a lot of potential false positives.
- nkkollaw 9y ago
  I am not talking about images, and I never have. I'm talking about maps + GPS (where is the road? will it curve in 50 meters?), and radar (what's in front of the car? how far is it? is it in the middle of the street, or on the side? Is it at the same height as my car?). I don't see how these two tools together can make accellerating towards a stationary object in front of you make more sense than slowing down, or at least make some sort of sound to alert/wake up the driver. Like I said, I know it's a difficult problems and very smart people have been working on this for possibly 20 years, but it still doesn't make sense to me.
  - Retric 9y ago
    You're bringing up maps, but they don't help in this case. Consider what happens if one of those signs falls down. You need to react to what the sensors detect not what it assumes is going on. (Maps useless) Radar shows relative speeds, but can't distinguish between the road, bridge, and a stationary firetruck. It simply does not in any way help with this problem. (Radar useless) LIDAR does what your thinking of, but Tesla does not use it. (LIDAR missing) They use images, to avoid using LIDAR. So, now we have to detect stuff from images which is why I am showing you images. (immages only thing you have.)
    - nkkollaw 9y ago
      Radar only works for moving objects?
      - Retric 9y ago
        At highway speeds and significant range yea. This gets into signal processing, when you send out a radar pulse you get a lot of junk returns. If you are slowly backing up and just want to know if a wall is there sure that works fine. But, for more distant objects a single pulse gives ever more crap the further out it travels. If you send 2 pulses next to each other you can adjust for vector of car and ignore the repeated data to just look for stuff moving relative to the background. This results in really 'easy' automatic cruse control that ends up hitting stopped objects on the road. PS: Things would get a little better if cars had one of those rotating arrays you see on ships, but car radar is a solid state system.

Retric 9y ago

But how can you tell they are 4 meters above the ground level. Nothing in the image directly shows the last row of signs are that high off the road. We can say they are not close enough to be a problem yet, but all I am pointing out is it's a harder problem than your thinking about with a lot of potential false positives.

nkkollaw 9y ago
I am not talking about images, and I never have. I'm talking about maps + GPS (where is the road? will it curve in 50 meters?), and radar (what's in front of the car? how far is it? is it in the middle of the street, or on the side? Is it at the same height as my car?). I don't see how these two tools together can make accellerating towards a stationary object in front of you make more sense than slowing down, or at least make some sort of sound to alert/wake up the driver. Like I said, I know it's a difficult problems and very smart people have been working on this for possibly 20 years, but it still doesn't make sense to me.
- Retric 9y ago
  You're bringing up maps, but they don't help in this case. Consider what happens if one of those signs falls down. You need to react to what the sensors detect not what it assumes is going on. (Maps useless) Radar shows relative speeds, but can't distinguish between the road, bridge, and a stationary firetruck. It simply does not in any way help with this problem. (Radar useless) LIDAR does what your thinking of, but Tesla does not use it. (LIDAR missing) They use images, to avoid using LIDAR. So, now we have to detect stuff from images which is why I am showing you images. (immages only thing you have.)
  - nkkollaw 9y ago
    Radar only works for moving objects?
    - Retric 9y ago
      At highway speeds and significant range yea. This gets into signal processing, when you send out a radar pulse you get a lot of junk returns. If you are slowly backing up and just want to know if a wall is there sure that works fine. But, for more distant objects a single pulse gives ever more crap the further out it travels. If you send 2 pulses next to each other you can adjust for vector of car and ignore the repeated data to just look for stuff moving relative to the background. This results in really 'easy' automatic cruse control that ends up hitting stopped objects on the road. PS: Things would get a little better if cars had one of those rotating arrays you see on ships, but car radar is a solid state system.