First, if the effect is not very good video surveillance cameras , the basic performance of color reproduction capability , mosaics and many other aspects of snow , but the image blur is likely to be the focus of the lens is not for good , especially the fixed focal length of the product . Manual focus is recommended . If there is not, it is better to change the lens. Dome Infrared Camera and attention to the need to open the enclosure can adjust the lens.
Second, the monitoring target image is too small , not enough due to the lens focal length . Proposed to replace long shot, as previously 6mm lens, 8mm or 12mm to more and so on. But it is worth noting that the larger the lens focal length , angle and range monitoring is also smaller . A fixed focal length lens is the longest focal length 25mm, 25mm lens , if the acquired image is not large enough ( for instance to see fourth word A4 paper ) , only the optical zoom is changed by more than 10 times the camera .
Third, the lack of clarity is also possible that a lower effective pixel image format ,DVR network camera image format can be between D1, HALFD1 and CIF and other image formats to choose from, D1 is the most clear . However, the clearest means occupies more bandwidth and storage space . Future network camera as well as megapixels class products , future cameras will greatly enhance the clarity .
Fourth, the level of resolution IP Camera itself is not enough, there is a general network cameras 420TVL, 480TVL, 520TVL several. The larger the value , the higher the resolution . So if the above three methods are not met demand , only increase the number of lines of the camera .
From: http://www.vstarcam.com/channel/Network-camera-image-blur-what-is-the-reason-396.html
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