Digital image equipment acquired by camera and automatic filtering method thereof

Abstract

The invention relates to digital image equipment acquired by a camera and a filtering method thereof. The digital image equipment comprises a shell, an infrared illuminating lamp, light-transmitting glass, a switchable double-filtering lens, an intelligent camera module with a light spot detection function, a lens and a photosensitive switch; when the camera detects that a light spot reaches a setvalue, the infrared lamp is turned on, and meanwhile, a visible light cut-off filtering lens is switched to filter out or attenuate the light spot to be very small; and if the photosensitive switch detects that the illumination environment is good, the infrared lamp is turned off, and meanwhile, the filtering lens is switched back to an infrared light cut-off filtering lens, so that color restoration acquisition of a video is realized. According to the invention, no spotlight interference exists, the camera can well restore the on-site color video effect, a mine lamp filtering device can be automatically detected and started under the condition of interference of a mine lamp and the like, interference of search lighting type light of the mine lamp and the like on the camera is removed, the problems of halo, blindness and the like caused by interference of the mine lamp on the camera are solved, and the video quality and the video recognition accuracy are improved.

Description

Technical field: [0001] The invention belongs to the technical field of coal mine safety, and in particular relates to a digital image device and an automatic filtering method used for camera collection in coal mines. Background technique: [0002] At present, video surveillance is more and more widely used in coal mines. Ordinary surveillance cameras have switchable dual-filter lenses (infrared cut-off filter lenses and full-transmission spectrum lenses). In an environment with good light, the camera obtains a better color video image restoration effect through the infrared light cut-off filter lens; in a dark environment, the camera drives the double filter lens to switch to a fully transparent spectrum through the detection result of the photosensitive switch lens and turn on the infrared fill light to achieve a better infrared video imaging effect in a low-light environment. [0003] However, there is still a scene in the field use of coal mines, that is, there are man...

AI Technical Summary

Problems solved by technology

[0003] However, there is still a scene in the field use of coal mines, that is, there are many scenes where there are many search-type strong light sources such as miner's lamps and car lights. Phenomenon, which interferes with the viewing of the video, and even causes the camera to be blinded in severe cases

This phenomenon not only affects the viewing of the video, but also greatly affects the image analysis results based on the video, and the existing cameras have not been able to solve this problem well

[0004] Although existing intelligent cameras have digital image processing methods for lighting equipment such as mine headlights and car lights, such as methods such as spot suppression and local contrast adjustment, the filtering algorithms for these image preprocessing are computationally complex and take up a lot of space. Second, the effect of spot suppression processing is average, and it can only suppress the spot in the video to make it smaller, but fails to eliminate the spot well; moreover, the video filter algorithm loses the overall contrast of the video image when suppressing the spot, resulting in The performance of the overall image details is degraded

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