posted in Technology

Flock misread license plates in 71% of the alerts it sent to police in one California town

In 2023 and 2024, Flock sent 1,427 alerts to the Roseville [CA] Police Department.

Roseville police found that Flock misread license plates in 71% of those alerts.

Max Isaacs, director of technology law and policy with the Policing Project at New York University’s School of Law, described Roseville’s misread data as “stunning.”

“A 71% misread rate is really beyond the pale,” he told Business Insider, referring to Roseville’s reported error rate for stolen and felony vehicle alerts. He added that “in the absence of concrete rules that directly address the problem of misreads, this technology is not safe to be deployed in communities.”

www.businessinsider.com/flock-camera-misread-license-plate-reader-california-roseville-police-2026-7
Business InsiderFlock misread license plates in 71% of the alerts it sent to police in one California townFlock sent 1,427 alerts to Roseville police over two years, flagging cars as stolen or used in a felony. In 71% of them, Flock read the plates wrong.

Replying to @⁨lepinkainen@lemmy.world⁩

If you have a pi reading license plates, you are probably scanning a few dozen different plates a day, looking if they match a handful of possibilities. If the only plate that opens the gate is ABC123, nothing happens if it accidentally reads anything else, and I’ll probably get it right a second later.

When Flock scans plates, it reads thousand of them every second looking to read and match every possible plate variation from every state (which there are over 8000 of) to every reported stolen plate, in all weather and lighting conditions. It’s really no wonder if 71% of the times it reports it found a stolen plate it had got it wrong.

Beautiful Public DataAll of the 8,331 License Plates in AmericaStates now offer a vast menu of personalized plate options for a dizzying array of organizations, professions, sports teams, causes and other groups.

Replying to @⁨NOT_RICK@lemmy.world⁩

…yes?

The cameras around the US scan 7000 plates per second, trying to figure out what they say with 8000 different possible plate designs around the country, and those results are then matched to a database of stolen vehicles and other plates , which there’s roughly 600k reported stolen in the US each year so. That database is going to be massive.

That means every second, 7000 strings of letters and numbers OCR’d at unknown conditions and accuracy are being compared to hundreds of thousands of stolen plates. They are guaranteed to get a number of “matches” constantly, most of them from reads that were not accurate.

And specifically because they aren’t sent anywhere, nobody can double check the picture to see if the camera got it anywhere right at all.

Replying to an earlier post

The cameras around the US scan 7000 plates per second

Yes the entire system saving that text, and maybe a still image handles that many… But the single camera taking each photo where the actual OCR processing is done ON THE CAMERA HARDWARE ITSELF only needs to handle maybe one or two each second… And only if it is looking at a busy road. At the distances these cameras can process, most are not handling a lot simultaneously. And very busy roads will have different hardware than the lower end camera systems used in most places.

You HAVE to purposely be trying NOT to understand any of the responses to you here. No one could possibly be that stupid unintentionally.