The principle of fog penetration of fog camera

[ Huaqiang Security Network News ]

What is the fog camera , what are the main features of the camera and the ordinary camera? As the name suggests, a fog camera is a camera that can penetrate the fog and capture clear images. However, in terms of practical application, this "transparent fog" can also pass through dust, water vapor, and small obstacles (such as slight dirt and rain of transparent cover). In these harsh environments, the image quality of ordinary cameras can be greatly reduced or even the images of the monitoring targets cannot be collected. The fog camera can often show their talents in these occasions.

Through fog camera

The principle of fog penetration is such that when visible light passes through the smoke or mist in the air, it will be blocked from reflecting and cannot pass, so the human eye that can only receive visible light can not see the object of the back door of the smoke mist. The near-infrared light can bypass the smoke and mist and penetrate the past due to the wavelength, and the camera's photosensitive element can sense this part of the near-infrared light, so this part of the light can be used to monitor the dust and fog. In the range of invisible light, infrared light of a certain frequency can penetrate the mist, but because of its different wavelength and visible light, it needs to be processed on the camera and the lens to achieve the purpose of focusing on it, and also needs to be on the camera. Redesigned to image invisible light at this frequency. Since this invisible light does not have a corresponding visible color map, the image presented on the monitor is black and white.

Shooting objects through clouds and water vapor is equivalent to passing through two lenses (waterdrops and actual lenses). Except that R rays can be correctly focused on the CCD imaging surface, GB in RGB light cannot be projected normally in CCD imaging. On the surface, this causes the normal mode lens to be unable to obtain images in the cloud and moisture in a normal and clear manner.

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