Automatic dimming method and device for infrared camera

Abstract

The invention discloses an automatic dimming method and device for an infrared camera, which adjusts the brightness of an LED lamp group according to the brightness of a moving target area in a video image, thereby obtaining a clear image of the most concerned moving target. Adjust the brightness of the infrared light by comparing the brightness contrast between the moving target area and the background area and whether the moving target is overexposed or too dark, so that the brightness level of the infrared light can be precisely controlled to avoid overexposure or too dark As a result, the details of the moving target cannot be seen clearly. In the traffic field, it only judges whether the license plate area is overexposed or too dark, instead of judging the entire image, and can more accurately control the brightness of the LED light group to obtain useful details of the license plate. The invention can effectively control the photoelectric conversion of the LED lamp, intelligently control the brightness of the LED lamp, effectively improve the resolution of moving target details, reduce the heat energy consumption of the infrared lamp, and prolong the service life of the whole machine.

Description

technical field [0001] The invention relates to the technical field of security monitoring, in particular to a device and method for automatically adjusting the brightness of an infrared lamp. Background technique [0002] Monitoring is the basic means of security prevention. With the development of the industry, security technology has received more and more attention from all aspects of society, and security monitoring has gradually become the focus of social demand. The advent of infrared camera technology has greatly promoted the promotion of security monitoring in the field of low-light monitoring, but the service life, heat dissipation and overexposure of infrared lamps have always been the bottleneck of the development of LED infrared cameras. [0003] The methods for the existing infrared camera to automatically adjust the brightness of the infrared light in the field of security monitoring include the following schemes: [0004] Option 1, the LED light group includ...

AI Technical Summary

Problems solved by technology

The advent of infrared camera technology has greatly promoted the promotion of security monitoring in the field of low-light monitoring, but the service life, heat dissipation and overexposure of infrared lamps have always been the bottleneck of the development of LED infrared cameras.

However, since this solution only focuses on the central part of the entire image, if the moving target is not in the center of the scene, the moving target we focus on after the dimming will instead be overexposed or too dark

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