A method and device for realizing anti-jamming of infrared camera

Abstract

The invention discloses a method and device for realizing anti-jamming of infrared photography. The method is to obtain any two adjacent frames of images first, wherein one frame of images is an infrared polarized image captured under an infrared light environment, and the other frame The image is the reference polarization image taken under natural light; the brightness output value of a certain point of the infrared polarization image and the brightness output value of the corresponding point of the reference polarization image are calculated by inter-frame difference, and the brightness output value of the corresponding point of the target image can be obtained; The luminance signal of each pixel of adjacent two frames of images is calculated as the inter-frame difference one by one, and the target image with only infrared light supplementary components can be obtained, which can completely eliminate the influence of Gamma correction and at the same time eliminate the infrared intensity of criminals. Light anti-interference makes the obtained image more realistic, greatly improves the recognition and anti-interference of the obtained image, and has a very high anti-interference function.

Description

technical field [0001] The invention relates to the field of optical imaging, in particular to a method and device for realizing anti-jamming of infrared imaging. Background technique [0002] With the continuous development of science and technology, the field of security and monitoring is increasingly dependent on camera equipment, and infrared cameras are only sensitive to infrared light, have no effect on it due to changes in the brightness of external visible light, and have small changes in image quality around the clock. The market share in the field of security and monitoring is increasing. [0003] The brightness range in nature is huge, 100000 Lux in daylight environment; 8000 Lux in cloudy environment; 300 Lux in indoor office environment; 5 Lux under street lights; If the dynamic range is stored according to the linear scheme, then the cost of storage and transmission is very expensive, and the human eye's perception of natural brightness is nonlinear, in order ...

AI Technical Summary

Problems solved by technology

[0004] Ordinary cameras can eliminate the influence of sunlight intensity changes and sunlight angle changes through frame-to-frame difference calculations. Most general frame-to-frame difference calculations use the calculation method of directly subtracting the brightness of two frames of images. The disadvantages of this calculation method It ignores the influence of Gamma correction, resulting in a large deviation between the brightness of the obtained image and the brightness of the image observed by the human eye in reality.

[0005] Ordinary infrared cameras emit infrared light through infrared generating devices to illuminate objects, and use infrared filters to filter most of the visible light to achieve anti-interference to natural light. At present, criminals often use ordinary infrared cameras that cannot filter infrared light. This feature performs infrared strong light anti-jamming, that is, by using infrared strong light to irradiate the infrared camera, resulting in partial overexposure of the picture and bright spots, so that the entire image cannot be seen clearly

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