Bats slam into buildings because they can't 'see' them
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Re: Bats slam into buildings because they can't 'see' them
#2I had read this as Bots slamming into buildings, and was looking for a discussion of lidar and stereo vision systems.
But won't lidar have the same issue, with a clean glass surface? Similar with stereo vision - if there are no features at the surface to correlate.
Re: Bats slam into buildings because they can't 'see' them
#3I had read this as Bots slamming into buildings, and was looking for a discussion of lidar and stereo vision systems. But won't lidar have the same issue, with a clean glass surface? Similar with stereo vision - if there are no features at the surface to correlate.
Vision based on visible light doesn't suffer from the problem in the same way as echolocation or lidar, since it is not dependant on observing signals emitted by the observer. I guess very smooth surfaces might act as mirrors, which will probably bring it's own set of difficulties for machines. Anecdotally, I can say my own stereo vision doesn't have big difficulties with most smooth surfaces though :)
Re: Bats slam into buildings because they can't 'see' them
#4That made me wonder how bats see water surfaces. Though I suppose not seeing them is less of a problem since they're not vertical :P
Re: Bats slam into buildings because they can't 'see' them
#5I had read this as Bots slamming into buildings, and was looking for a discussion of lidar and stereo vision systems. But won't lidar have the same issue, with a clean glass surface? Similar with stereo vision - if there are no features at the surface to correlate.
Vision based on visible light doesn't suffer from the problem in the same way as echolocation or lidar, since it is not dependant on observing signals emitted by the observer. I guess very smooth surfaces might act as mirrors, which will probably bring it's own set of difficulties for machines. Anecdotally, I can say my own stereo vision doesn't have big difficulties with most smooth surfaces though :)
But bats also use vision based on visible light. I haven't read the article yet, but do they explain about why the bat wouldn't see the building with its eyes?
Re: Bats slam into buildings because they can't 'see' them
#6Interesting hypothetical to track bat evolution in urban areas over time to determine if selection is occurring for bats whose sonar is more finely attuned for detecting diffused returns as actual signal for skyscrapers or, for that matter, improved actual sight to avoid the buildings in the first place.
Re: Bats slam into buildings because they can't 'see' them
#7TIL Some Hawkmoths shoot ultrasound from their junk to thwart bat attacks. http://www.pnas.org/content/112/20/6407.full.pdf
Re: Bats slam into buildings because they can't 'see' them
#8Earlier quoted context omitted.
Vision based on visible light doesn't suffer from the problem in the same way as echolocation or lidar, since it is not dependant on observing signals emitted by the observer. I guess very smooth surfaces might act as mirrors, which will probably bring it's own set of difficulties for machines. Anecdotally, I can say my own stereo vision doesn't have big difficulties with most smooth surfaces though :)
But bats also use vision based on visible light. I haven't read the article yet, but do they explain about why the bat wouldn't see the building with its eyes?
It might be nighttime.
Re: Bats slam into buildings because they can't 'see' them
#9Interesting hypothetical to track bat evolution in urban areas over time to determine if selection is occurring for bats whose sonar is more finely attuned for detecting diffused returns as actual signal for skyscrapers or, for that matter, improved actual sight to avoid the buildings in the first place.
Bats already have very good vision. They just can't see well in the dark.
Re: Bats slam into buildings because they can't 'see' them
#10This reminded me of
(humor)
http://www.mjt.org/exhibits/foundation_collections/depmori/d...
"The key idea in the Griffith hypothesis was that as the Myotis lucifugus emission increased in frequency, the emission actually crossed the thresholds from the extreme ultraviolet into the X-ray, thereby allowing the bat to fly unharmed through solid objects."