Last month, we talked about the accuracy improvement of traffic sign recognition with the help of Mapillary users. Today, we would like to share some more updates on traffic signs.
One of the challenge of recognizing traffic signs globally is the appearance variation between different countries. There are two main standards for traffic signs; the Vienna Convention used by most European countries, and the Manual on Uniform Traffic Control Devices followed by most American and Asian countries.
Country-specific sign recognition
To handle these variations, we have been working with country-specific training for traffic sign recognition as well as naming normalization in Traffico. Today, we are happy to introduce three completely new traffic sign recognition packages for Australia (71 signs), Brazil (97 signs), Canada (102 signs) and updated packages for Europe (32 signs added with country-variants) and US (12 signs added, including US speed limits). In particular, with the releases of the US/Canada speed limit sign recognition, we can now detect another major variant of speed limit signs in the world.
[Add two figures with detection here]
Traffic sign API
With this update we support a total of five traffic sign packages in our API.
The documentation is here.
After this update, we plan to release progressively country-specific traffic sign recognition for countries all over the world. As always, there is no perfect recognition system out there (at least not yet ;)). Your feedback to the traffic sign recognition is invaluable to the future improvement of the accuracy.
/Yubin and The Mapillary Team