Group items tagged

stream light in between the drops

answer consists of a co-located imaging and illumination system-- camera, projector, and beamsplitter

integrate an imager and processing unit with a light source

camera images the precipitation at the top of the field of view

processor can tell where the drops are headed and sends a signal to the headlights

make their adjustments and react to dis-illuminate the particles

entire action, starting from capture to reaction, takes about 13 ms.

system runs at 120 Hz. The camera uses a 5 ms exposure time and the system has a total latency of 13 ms

how fast will the system need to be, to be actually effective, in a car

simulations show that a system operating near 1,000 Hz, with a total system latency of 1.5 ms, and exposure time of 1 ms can achieve 96.8% accuracy

90% light throughput during a heavy rainstorm [25 mm/hr] on a vehicle traveling 30 km/hr

400 Hz with less accuracy will be a significant [>= 70%] improvement for the driver

operating range is about 13 feet in front of the headlights

recent computer vision methods that digitally remove rain and snow streaks from captured images

simulation results show that it is possible to maintain light throughput well above 90 percent for various precipitation types and

prototype system operating at 120Hz on laboratory-generated rain, which validated their earlier simulations

prototype consists of a camera with gigabit ethernet interface (Point Grey, Flea3), DLP projector (Viewsonic, PJD62531), and desktop computer with Intel architecture (Intel i7 quad core processor).

next steps will involve making the system faster and more compact to test on a moving platform

research for those ends may take three to four more years and “commercializing it as a product will take additional years.”

the prototype was built with off-the-shelf components

data transfer speed is slower than if the components were more closely integrated

more sophisticated algorithms are needed to maximize system speed and account for factors such as vehicle motion and wind turbulence

This is the first isolated planetary mass object ever identified in a moving group

Looking for planets around their stars is akin to studying a firefly sitting one centimetre away from a distant, powerful car headlight

If CFBDSIR2149 is not associated with the AB Doradus Moving Group, the astronomers say it is trickier to be sure of its nature and properties, and it may instead be characterized as a small brown dwarf