Auto-exposure method and system for vehicle-mounted camera

摘要: The present invention provides an auto-exposure method and system for a vehicle-mounted camera. According to the method, after initialization, region of interest is set, only each frame image processed; camera started, exposure time first adopts initial time, second rapidly adjusted set with gray threshold as standard, all subsequent frames, when average difference between current previous does not exceed jitter jump range, value maintained adopted, if traffic sign detected, adjustment based on entropy carried out, within standard directly PID performed according proportion value, not, pre-estimation next acquired by using looking up table through CMOS sensor characteristic; finally, controlled range.