What is the use of the network camera night function?

What is the use of the network camera night function?

In the dark or under-light condition, the digital video camera can be specially set to compensate for the loss of image quality. This function is called the night shooting function. In order to cope with the problem of unclear picture quality and excessive noise in the dim environment, all digital camera manufacturers have tried their best to enhance the night camera function as one of the breakthrough technologies. Today's consumer-grade digital cameras have a night camera function, but the advantages and disadvantages of these features are different.

Infrared night photography:

Infrared night photography can be shot in the full black ring (0 Lux), and even objects that cannot be distinguished by the naked eye can now be clearly photographed. Because the digital camera uses CCD to sense all the light (visible light, infrared light, ultraviolet light, etc.), this makes the captured image very different from the image produced by our naked eye only seeing visible light. In order to solve this problem, the digital camera adds an infrared filter between the lens and the CCD. Its function is to block the infrared rays from entering the CCD, so that the CCD can only sense the visible light, so that the image captured by the digital camera and our naked eye The images you see are consistent. Used in conjunction with a slow shutter switch, the image is meticulous. One of the main drawbacks of this night-time feature is two-color shooting, either black and white, or greenish, and the resulting image is very noisy. Using this night camera function, you can "see" the object very well, but it is still far away from the "look at" object.

Super Infrared Night Shot:

The slow shutter speed of the Super Infrared Night Shot function is automatically adjusted for better image quality. Need to pay attention: Because the premise of infrared night photography is that the digital camera can emit infrared light that is invisible to the naked eye to illuminate the object being photographed, so the shooting distance is limited, if the infrared light from the digital camera arrives If you can't shoot the object, then of course you can't shoot anything.

Color night photography:

Color night camera function of Panasonic digital video camera: The "night vision" method adopted by Panasonic digital video camera is: "color night vision". The color night vision function uses the brightness of 1LUX (the shutter speed is controlled at 1/2 second) to brighten the subject. The color night vision camera does not emit infrared light like the infrared night camera. It does not emit any light. Instead, it uses the means of prolonging the exposure time of the CCD, so that the charge generated by the light on the CCD is gradually increased and accumulated. The digital camera's circuit performs high-gain operation to complete the "night vision" function. It is characterized by at least 1 lux of light (about the brightness of a candle). Because it is not infrared, the picture is colored. This is better than Sony's digital camera. The color image is always black and white. It looks pleasing to the eye. However, due to the prolonged exposure time of the CCD, the picture taken is not continuous, and the phenomenon of tailing of the picture may occur.

Night eye function:

Japanese company JVC launched the "night eye" function. This function is similar to Panasonic's color night vision function. It also uses a slow shutter speed. Therefore, it is best to use a corner frame when shooting. It is difficult to obtain a good picture by hand. It is more suitable for shooting a color picture that does not move. When shooting a moving object, like Panasonic's color night vision function, the image will have a trailing phenomenon, and the picture will appear intermittent.