The Shield AQ Series PTZ speed surveillance camera undergoes IP66 waterproof tests, coldproof tests at -40 degrees Celsius, and heatproof tests at 70 degrees Celsius before it leaves the factory, and can stand a 6000V instant lighting standard.
Shield AQ Series 3 in 1 PTZ speed surveillance cameras support the majority of mainstream surveillance systems, including TVI、AHD and CVBS. Its broad spectrum support eases users from worries.
Shield AQ Series PTZ speed surveillance cameras can be operated through network over the camera direction and zoom-in and zoom-out of the surveillance screen at a high speed with clean pixel and no haziness. The central surveillance station will no longer need to guess and can actually see a remote image synchronously. Selections of 4~36 zooming scales of auto focus zoom lenses for a distance of 30~150 meters are available depending on different models.
3DNR Technology (3D Noise Reduction) is a method of suppressing noise in an image, appearing in low light.
In video transmission systems also include the video surveillance systems, a special place is given to noise filtering algorithms. Noise reduction is crucial for the overall functioning of the system, since the presence of noise in the video signal not only degrades the image quality, but also affects the subsequent processes of signal processing. Noise is especially harmful to the digital video that is compressed and then decompressed.
Currently, methods of noise reduction can be divided into two types: 2-dimensional 2DNR, (divided then into spatial and temporal) and 3-dimensional 3DNR noise reduction.
The spatial noise reduction filter analyzes the picture only in the spatial domain, ignoring the information in the temporal direction. Temporal noise reduction filters analyze only the pixels in the temporal direction. For the temporal noise reduction, adaptive or compensatory techniques can be used. With the usage of the adaptive method the pixels that are in the same position in different frames are analyzed. Compensatory technique is based on the analysis of trajectories, based on the factual evidence received from the evaluation of movement. But 2DNR method has the disadvantage – when processing the signal, the image details become blurred. 3DNR noise reduction filter combines the advantages of temporal filters with spatial filters, but at the same time has no their disadvantages.
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