Analysis of the four major problems faced by the HD IP Camera

Analysis of the four major problems faced by the HD IP Camera
For now, the security monitoring applications in the field of HD IP Camera Box Camera, Zoom Camera, Dome Camera, High Speed ​​Dome cameras and other types of products. According to the survey, high-definition camera products, HD integrated camera models such as R & D technology is not yet widespread, gun-type HD camera by virtue of their "fortune" early, mature technology and cost advantage occupied most of the low-end market and some high-end market. Nonetheless, the existence of many drawbacks should not be ignored.
Focal point offset
Gun Camera mainly by the two parts of the body and lens combination, a perfect match for the high-performance implementation depends on the body and lens. Monitoring project, if the user or construction professional and technical personnel, with the camera and the lens is unreasonable, it will affect the camera performance. In security applications, the user manually focusing lens, manual focusing, however, relies on the human eye to detect visually and manually adjustable, its efficiency is low, the accuracy is unsatisfactory; Moreover, the gun-type susceptible to moisture, vibration, thermal expansion present. environmental factors such as cold shrink interference in use for some time, prone to image blur caused by camera focal point offset, unstable, and fast aging.
Back focus adjustment (back focus) problem
Due to the uneven surface of the camera image sensor target and the difference between different lens focal length, so the bolt back focus adjustment (back focus) technology, has been fixed gun-type IP Camera manufacturers need to focus on research and development of technology. Early back focus adjustment method is the back focus adjustment ring + back focus lock screw, locking screw is easy to damage in a number of regulated adjusting ring threaded affect the stability of the coke; Another way is to bevel self-locking regulatory agencies, usually plastic materials, may also be caused due to thermal expansion and contraction in extreme environments coke out of focus. In addition, some of the new approach is the use of more precise and reliable thread focusing mechanism, but the cost of inputs in the mold manufacturers more.
Out of focus after the bolt used for some time, users and vendors have their own solution. User (or contractors) are usually only send technical personnel to the scene to deal with distribution of distant monitoring front-end network monitoring equipment, which will greatly enhance the monitoring and maintenance costs; while a few manufacturers are also added to the electronic camera focus adjustment mechanism , but no doubt also increases the cost of the camera.
Night vision problems
Either users or manufacturers hope that the camera can bring the same excellent picture quality in both day and night. In order to achieve the round-the-clock monitoring, in addition to looking forward to the high-sensitivity high-sensitivity image sensor, the manufacturers had to use a variety of means to enhance the effect of images in low-light environments. Such as day and night IR cut-off the dual filter automatically switching mechanism, color to black, 3D digital noise reduction, digital wide dynamic image enhancement technology.
However, regardless of whether the products will be minimum illumination values ​​are indicated at most, the night surveillance effect during the day or a certain gap, in order to obtain a clear picture, the need to fill the scene light (white light, infrared or laser night vision). Gun Camera lens camera low light are also important as megapixels HD IP Camera in addition to should select the appropriate megapixels lens, lens coating and design of the light-bending rate should also comply with the appropriate standards. Of course, low-light performance image sensor coupled with a stable and reliable filter mechanism outside with a good lens, coupled with excellent image enhancement algorithms, these are a good gun camera products need to have elements, but these are not low-priced products can shirk.
Zoom problem
The bolt lens market many type of auto iris manual zoom, focal length of a few millimeters to tens of millimeters, the focal length needs to be adjusted during installation in place and locked. The bolt usually only used in a limited range of monitoring applications, such as monitoring the position of the interior, corridor, car park entrance relatively fixed place. Of course, the gun camera can also use the power zoom lens, motorized lens complex process, high production costs, so now the electric lens on the market are more expensive. Lens manufacturer lens strict selection, and alloy commonly used in the aviation and aerospace technology, using high precision CNC machine tools and a one-time processing, lens and lens mount connection with locking ring fastening way to improve the stability of the HD IP Camera sex. This zoom lens is usually used in forest environment and fire monitoring, border and other special occasions, the average user is hardly universal. In addition, due to network latency issues, brought the power zoom manual control secondary focus is undoubtedly a major problem.
From:http://www.vstarcam.com/channel/Analysis-of-the-four-major-problems-faced-by-the-HD-IP-Camera-98.html

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