A recent report emerging from the center of U.S. auto manufacturing is raining on the AI parade with research results claiming autonomous vehicle algorithms fare poorly in bad weather.
The study by researchers at Michigan State University found that even light rain or drizzle can interfere with algorithms used in self-driving car cameras. That could mean future fleets might initially be restricted to sunny states such as Arizona, California and Florida.
The Michigan State study determined that the core problem stems not from the cameras used as primary sensors for detecting obstacles but the algorithms used to sort through computer vision data.
“When we run these algorithms, we see very noticeable, tangible degradation in detection,” Hayder Radha, a Michigan State University professor of electrical and computer engineering who oversaw the study, told Automotive News in late November. “Even low-intensity rain can really create some serious problems, and as you increase the intensity, the performance of what we consider state-of-the-art mechanisms can almost become paralyzed.”
The university researchers found that computer vision algorithms failed to detect about 20 percent of objects in light rain. The failure rate doubled when rain intensity was tripled.
Additional factors such as seasonal changes---like reduced autumn foliage and colder weather---also affected other autonomous vehicle sensors like radar and lidar. Changing seasonal scenes underscored a need to update high-resolution maps used by autonomous systems.
“I’d say now that challenging weather conditions are going to be a problem for many years to come,” Radha told the automotive website.
Weather concerns have not dampened investor enthusiasm in autonomous systems startups. For example, Korean carmaker Hyundai announced in November that it is investing in Allegro.ai, an Israeli startup applying deep learning to computer vision for car navigation. Founded in 2016, Allegro.ai emerged from stealth mode in April upon completion of a Series A funding round that raised $11 million.
Hyundai Cradle, the auto manufacturer’s venture arm, entered into a strategic partnership with Tel Aviv-based Allegro.ai. It did not disclose the amount of its investment, saying only that the collaboration would help accelerate deployment of the startup’s AI technology.