Vehicles can be equipped with computing devices, networks, sensors and controllers to determine, modify, and/or augment a digital map of the surrounding real world. The invention comprises determining road sign locations (404-410) in LIDAR data, identifying road signs 604-610 in video images based on the road sign locations, and including (806) the road sign in a digital map based on the road sign identity and location. The signs could be provided with retro-reflective areas to produce a high-intensity returns (304-310) in the LIDAR data. The LIDAR data could also be subjected to clustering and filtering to enhance the appearance of the signs. Optical character recognition (OCR) could also be used on the sign images in the video data, and the video images could be projected homographically (704-710) to eliminate pose distortion.
Road sign recognition
2018-07-18
Patent
Electronic Resource
English
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