ROBUST ASSOCIATION OF TRAFFIC SIGNS WITH A MAP

Techniques provide for accurately matching traffic signs observed in camera images with traffic sign data from 3D maps, which can allow for error correction in a position estimate of a vehicle based on differences in the location of the observed traffic sign and the location of the traffic sign based on 3D map data. Embodiments include preparing the data to allow for comparison between observed and map traffic sign data, conducting the comparison in a 2D frame (e.g., in the frame of the camera image) to make an initial order of proximity of candidate traffic signs in the map traffic sign data to the observed traffic sign, conducting a second comparison in a 3D frame (e.g. the frame of the 3D map) to determine an association based on the closest match, and using the association to perform error correction.