les fous du volant - Page 130

The_CUrE (./3872) :
Tesla c'est l'Apple de la bagnole ou je rêve?

Attack makes autonomous vehicle tech ignore road signswww.theregister.comCameras tested are specced for Baidu's Apollo

The technique, dubbed GhostStripe [PDF], is undetectable to the human eye, but could be deadly to Tesla and Baidu Apollo drivers as it fools the type of sensors employed by both brands – specifically CMOS camera sensors.

It basically involves using LEDs to shine patterns of light on road signs so that the cars' self-driving software fails to understand the signs; it's a classic adversarial attack on machine-learning software.

Crucially, it exploits the rolling digital shutter of typical CMOS camera sensors. The LEDs rapidly flash different colors onto the sign as the active capture line moves down the sensor. For example, the shade of red on a stop sign could look different on each scan line to the car due to the artificial illumination.

The result is the camera capturing an image full of lines that don't quite match each other. The information is cropped and sent to a classifier within the car's self-driving software, usually based on deep neural networks, for interpretation. Because it's full of lines that don't match, the classifier doesn't recognize the image as a traffic sign.

So far, all of this has been demonstrated before.

Yet these researchers not only distorted the appearance of the sign as described, they did it repeatedly in a stable manner. This meant an unrecognizable image wasn't just a single anomaly among many accurately identified images captured by the vehicle software, but rather a constant unrecognizable image was presented to the classifier. That makes the attack practical against autonomous vehicles, it's said.

"A stable attack … needs to carefully control the LED's flickering based on the information about the victim camera's operations and real-time estimation of the traffic sign position and size in the camera's [field of view]," the researchers explained.

Car publications were already warning consumers to steer clear of the Ocean as early as this March, despite massive price cuts that saw these electric SUVs being offered for less than $25,000. A New York-based company called American Lease was less deterred by this warning and in June agreed to purchase the remaining Fisker inventory—approximately 3,300 cars for a total of $46.3 million dollars. By October, American Lease had paid Fisker $42.5 million and had taken delivery of about 1,100 Oceans.

That was the plan until the end of last week, at least. Last Friday evening, Fisker informed American Lease that the Oceans "cannot, as a technical matter, be 'ported' from the Fisker server to which the vehicles are currently linked to a distinct server owned and/or controlled by" American Lease.

American Lease says it "cannot overstate the significance of this unwelcome news," particularly since it had already paid Fisker the vast majority of the agreed price. American Lease is also more than a little unhappy that the news was delivered a few days before a court hearing scheduled for today and says it's

vince (./3898) :
vu les comptes twitters correspondants, je dirais un vélotaffeur...