Is there is a single camera specification that offers a broad perspective, as well as sufficient giving depth of field to allow useful investigation within a scene that’s up to 50 metres deep?
A: Given default installation is so common, it’s appropriate to consider whether any camera type will be more flexible out of the box thanks to a balance of sensitivity and resolution. Frankly, it’s another of those balancing acts. More pixels means better resolution throughout a wider and deeper field of view. It also means poorer low light performance. The best low light cameras are typically 720p or 1080p but the difference between the amount of detail you get with HD and UHD in reasonable and good light is considerable. Only under 25 lux do you start seeing UHD battle with the business of amplifying and then smoothing image streams from its crowded sensor’s smaller photo sites. These processes lead to loss of detail. But if the light is ok and bandwidth is accommodated by the network or compression is well handled by the camera, UHD is unquestionably superior.
In our opinion, a perfect camera for default work would be UHD with a 1-inch sensor. The sensor and optical formula would ensure the signal was not overworked by too much amplification and too much suppression of resultant noise. It would use compression algorithms and ROI mechanisms that allowed it to perform at full resolution at a bitrate under 5Mbps (this depends on the network – you may have more headroom) through a 24-hour light cycle and in the presence of typical scene movement.
Many CCTV applications are certain to fail to meet operational requirements because they try to offer situational awareness and facial identification at the same time. It’s very difficult to do both with current technology using one camera. ID with HD cameras means a field of view so tight that a temporal comprehension of unfolding events is hard to ascertain. The result is that in court, video evidence in inconclusive. At the same time, situational awareness in a larger scene using wider angle lenses means low resolution images that fail to provide identification. As a result, they deliver video evidence that’s inconclusive.
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