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Illuminated Road Signs Can Be Good For Your Eyes; Bad For AIs – PC Perspective

Illuminated Road Signs Can Be Good For Your Eyes; Bad For AIs – PC Perspective

Misuse of rolling digital shutter on CMOS camera sensor

There's another reason to distrust self-driving cars, adding to a long list of ways to fool sensors into making them behave in unpredictable ways. This one, Which the Register found out is called ChostStripe., uses LED lighting to confuse sensors so they cannot recognize road markings. This attack uses LEDs to illuminate a sign, common enough on highways to ensure that we can see them with the human eye Mk. 1, but adds little.

Modified light looks normal to us, however a CMOS-based camera will see rapidly changing colors as its capture line moves below the mark. This means that a stop sign may start out as detected as red, but then the camera may have rainbow bands of color as it approaches the sign. This changing color means that the sensor is passing strange data to a neural net that makes a call as to whether it is a road sign or not. It's going to spoil it by not matching the expected pattern, and your self-driving car will go straight through the intersection.

As it has seemed for some time, we will have safe self-driving cars tomorrow … always tomorrow.

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