How to tell if a camera is installed on the road? Or a surveillance camera?

Ball monitoring, mainly for cameras!

Extended data:

Monitoring camera is a semiconductor imaging device, which has the advantages of high sensitivity, strong light resistance, small distortion, small volume, long life and vibration resistance. In the security system of the surveillance camera.

At present, the image is mainly produced by CCD camera, and the stored charge can also be taken out to change the voltage, which has the characteristics of anti-vibration and impact and is widely used.

20 17 12 1, the English translation and writing standard for public services was formally implemented, and the English name of the surveillance camera standard was Surveillance Carmera.

classify

Divided by imaging color

(1) color camera: It is suitable for distinguishing the details of a scene, such as clothes or the color of the scene. Because of the color, the amount of information increases, which is generally considered to be 10 times that of black and white cameras.

(2) Black-and-white camera: suitable for areas with insufficient light and areas where lighting equipment cannot be installed at night. When only the position or motion of the scene is monitored, a black-and-white camera with a resolution usually higher than that of a color camera can be selected.

Divided by camera resolution

(1) The image pixel is about 250,000 pixels, the color resolution is about 330 lines, and the black-and-white resolution is about 400 lines.

(2) The number of image pixels is between 250,000 and 380,000, the color resolution is 420 lines, and the black and white resolution is below 500 lines.

(3) The image is more than 380,000 points, the color resolution is more than or equal to 480 lines, the black-and-white resolution is more than 600 lines.

Divided by camera sensitivity

(1) Normal type: the illumination required for normal operation is 1~3 lux.

(2) Moonlight type: the illumination required for normal operation is about 0. 1 lux.

(3) Starlight type: the illumination required for normal operation is below 0.0 1 lux.

(4) Infrared illumination type: In principle, the illumination can be zero, and infrared light source is used for imaging.

According to the size of the CCD target surface of the imaging element

The size of (1) 1 in the target plane is 12.7mmX 9.6mm high and the diagonal is 16mm.

(2) The size of the 2/3 inch target surface is 8.8mmX 6.6mm high, and the diagonal line is11mm..

(3) The dimensions of the target surface 1/2in are: 6.4 mm in width, 4.8 mm in height and 8 mm in diagonal.

(4) The dimensions of1/3 inch target surface are: 4.8mmX in width, 3.6mm in height and 6mm in diagonal.

(5) The size of1/4in target surface is 3.2mmX wide, 2.4mm high and 4mm diagonal.

(6) 1/5in is under development, and the official product has not yet been launched.

In addition, CCD cameras can be divided into PAL system and NTSC system, and can also be divided according to the image signal processing mode or camera structure.

References:

Surveillance Camera-Baidu Encyclopedia