Weakening method of powerful lights for vehicle night vision images

Abstract

The invention provides a weakening method of powerful lights for vehicle night vision images. According to the weakening method, powerful light sources of position images are accurately detected, weakening process is performed on the powerful light sources, and simultaneously, smooth transition of the powerful light sources and the peripheral neighborhoods is maintained, therefore dynamic range of the images is effectively changed, and the problems of excessive enhancement of local powerful light by night vision image enhancement algorithm and powerful light peripheral information loss of the night vision images are solved completely. The dynamic range of the night vision images obtained through processing of the method is obviously improved, highlight areas are obviously weakened, light spots in the night vision images disappear or obviously weakened, powerful light peripheral information is clear, a night vision system can clearly display the front and peripheral information, and drivers can clearly see the front and surroundings.

Description

technical field [0001] The invention relates to an image processing method, in particular to a strong light weakening method for a vehicle-mounted night vision image. Background technique [0002] In recent years, with the development of the automobile industry and the rapid expansion of highways, the number of automobiles has increased rapidly. According to the U.S. National Highway Traffic Safety Administration (NHTSA) statistics, the proportion of driving at night only accounts for a quarter of the total road traffic, but the fatal accidents account for half. The reason, in addition to the impact of vehicle conditions and driving skills, is the main reason for poor vision at night. How to improve the safety of drivers, passengers and third parties has become a topic of increasing concern in recent years. [0003] The irradiation range of the low beam of the headlights of ordinary cars is only 30 meters away, so it is difficult for the driver to see clearly or not at all...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the disadvantages that the night vision image enhancement algorithm over-enhances the local strong light, further expands the range of strong light, loses the surrounding information of the strong light, and cannot clearly display the surrounding information in front of the night vision system, and provides a vehicle-mounted night vision system. The strong light weakening method of the image, this method accurately detects and locates the strong light source in the image, and weakens the strong light source, while maintaining the smooth transition between the strong light source and the surrounding neighborhood, effectively changing the dynamic range of the image, and completely solving the night vision image enhancement algorithm Excessive enhancement of local strong light, loss of surrounding information in night vision images under strong light

Images