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Relationship Between Selection Of Camera And Video Quality Analysis

Monitoring project, of whatever application, the video frequency picture effect is key factor in the assessment of lens quality. Good camera if accompanied by bad shots, you can't get quality monitoring. Similarly, if a good lens coupled with bad camera, that's not going to have a good video rendering. High quality lenses, not only in image sharpness, contrast, and brightness, color reproduction is good and picture distortion distortion. On the paired with cameras, lens selection factors that should be considered include the following.

●  F value the smaller the higher luminous flux. If the camera itself has a Lux meter has certain requirements for amount of light f value, so engineers need to be aware of the luminous flux of the lens must be greater than the amount of light the camera, as camera is the F1.4, you at least want to use F1.4 or F1.2 lens to match;

●  Match the lens mount. Or c and CS Mount must be matched. Of course, in most 5mm adapter ring this no problem, but in the install link failures emerge (on the section in the installation chapter to explain to the reader);

●  Big aperture range, the f value from small to large numerical range of bigger is better, which can match the camera to adapt to the ambient light conditions to cope with any changes in the lighting conditions;

●  Infrared lens selection is not absolute, in (Day and Night) day/night camera with (Low-Light) to err on the low illumination camera matching. ICR (color to black) camera for IR camera has no preference, on the contrary, in the condition of black and white, IR lens could be an excessive waste of functions;

●  Through induction range of infra-red waves to the camera selection (LD low scattering optical lens) lens. IR infra-red sensors are about is in the 300-750nm range, but if there is a demand to transmit in fog, the camera and lens in the infrared wavelength must be with the range to reach 700-950nm on induction, because the only wavelengths reaching the range, to work through the fog effect;

●  The match must also pay attention to the diameter of the lens at the camera on the match, past simple, and 1/2 and the 1/4-inch is not the law, along with the development of the CMOS sensor, more and more the size of the acquisition aperture size appears, the match the diameter of the lens is larger than the aperture of the camera this principle remains unchanged, but the principles have also caused errors in the project selection and application.

●  Lens coating should be uniform. Present high quality lens coatings are multilayer-coated. Compound coating can effectively inhibit the backlighting and light scattering, adverse effects to keep cameras out of the light screen;

●  Aspheric lens match, million or a million cameras, with a non-spherical lens on camera light with an overall average of all improved. Because aspheric lenses, sharpness, contrast, screen brightness compared with spherical lenses have good results;

●  The best selection of focal length, depth of field or Aperture has a fixed lock of adjusting screw. Because the lens is used in a variety of different environments and fixed conditions, if you have this device can avoid has better picture quality changes due to camera shake;

●  Use camera with lens structure for easy installation and size, too big or too small the lens to the camera to install or inconvenience on the construction, especially lenses need to be cautious in the use of the structure is more complex;

For engineers, the above lens and camera selection of a number of important factors is essential. Similarly, in engineering construction and installation of the camera often appears on the problem and error effects should not be underestimated.

Shenzhen Youguan CCTV Technology Co.,Ltd