What are the classifications of security surveillance cameras?

[ Huaqiang Security Network News ] In the security system, the image generation is mainly from the ccd camera. ccd is the abbreviation of charge coupled device. It can convert light into electric charge and store and transfer the electric charge. It can also store The charge is taken out to change the voltage, so it is an ideal camera component. The ccd camera is widely used because of its small size, light weight, no influence from magnetic fields, and resistance to shock and impact. Ccd cameras can be roughly divided into the following categories:
Security camera
Divided by imaging color (1) Color camera: It is suitable for distinguishing details of scenes, such as distinguishing the color of clothing or scenery. The amount of information increases due to the color, and the amount of information is generally considered to be 10 times that of a black-and-white camera.
(2) Black-and-white camera: It is used in areas with insufficient light and where lighting equipment cannot be installed at night. When monitoring only the position or movement of the scene, the black-and-white camera with a resolution usually higher than that of the color camera can be selected.
Divided by camera resolution (1) Low-end type with image pixels of about 250,000 pixels, color resolution of 330 lines, and black-and-white resolution of 420 lines.
(2) The mid-range (3) image with image pixels between 250,000 and 380,000 and a color resolution of 420 lines and a black-and-white resolution of 500 lines is above 380,000 points, and the color resolution is greater than or equal to 480 lines. Black and white resolution, high resolution above 570 lines. Divided by camera sensitivity (1) Normal type: Illumination required for normal work is 1~3lux
(2) Moonlight type: The illumination required for normal work is about 0.1 lux. (3) Starlight type: The illumination required for normal operation is 0.01 lux or less. (4) Infrared illumination type: In principle, it can be zero illumination, and infrared light source imaging is used.
Divided by the size of the ccd target surface of the imaging element (1) The size of the linch target surface is 12.7 mm wide and 9.6 mm high, and the diagonal is 16 mm.
(2) 2/3inch target surface size is 8.8mm wide and 6.6mm high, diagonal 11mm
(3) 1/2 inch target surface size is 6.4mm wide x 4.8mm high, diagonal 8mm
(4) 1/3 inch target surface size is 4.8mm wide x 3.6mm high, diagonal 6mm
(5) 1/4 inch target surface size is 3.2mm wide and 2.4mm high, diagonal 4mm
(6) 1/5inch is under development, and official products have not yet been released. In addition, ccd cameras have pal system and ntsc system, and can also be divided according to image signal processing or camera structure.

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