When “190” was read as “19”: plates with a three-digit region
Correct reads of nine-character plates went up 80 times.
Situation
At the entry, plates with a three-digit region were read with one character missing: of 578 crops in a day, 532 were read as eight characters. Vehicles on the allow list were not recognised.
What we did
We compared recognition models on 4,893 Russian plates and took the best one for nine-character plates. Each plate box is now read three times with different margins, and installers got a rule: the plate must be at least 120 pixels wide in the frame.
Outcome
The share of correct reads of nine-character plates rose from 0.8% to 64.4% per crop, and over several frames of a passage the plate is read with confidence.
Sections used in this case
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