"Roland Perry" wrote in message
...
In message , at 20:05:01 on
Sun, 17 Sep 2017, Charles Ellson remarked:
On Sun, 17 Sep 2017 09:40:01 +0100, Roland Perry
wrote:

In message , at 03:29:35 on
Sun, 17 Sep 2017, Charles Ellson remarked:
But instead of the early grainy, very low res, fuzzy, extended play
VHS
images on worn-out tapes, it's now HD quality, sharp, clear, digital
images. Perhaps some are now 4k video quality?

How many would sir like ?
https://www.cctvcameraworld.com/4k-ip-cameras.html

I wonder how widely installed those are? Most installed cameras are
well
behind the state-of-the-art.

At around 200 squid a time possibly roughly the same good/bad quality
spread among users applies as before when it seemed to be "TV" quality
v. something cheaper ?

The cost of CCTV systems is much more than just a consumer grade camera.
For public surveillance not only is there the backhaul, but they are
often able to pan and tilt, and need much better sensitivity/
illumination than those listed.

Have you actually installed and used those cheapo ones? They are OK for
the passageway down the side of a shop, but not much else.

There's not much point having pan and tilt if you haven't got someone
to operate it; the "do you know this person?" pictures generally seem
to come from fixed cameras.

Tell that to the installers of the tens of thousands of cameras which do
pan and tilt.

The need for moveable cameras is reduced by siting fixed cameras at pinch
points;

The moveable cameras tend to be at strategic points where they can cover
may different routes. The panning and tilting can be automatic on a timer.
Such cameras are more for preventing crime than detecting it.

each moveable camera is likely to augment several fixed cameras depending
on purpose. When you get to the point of needing to track a specific
target then you probably are needing more moveable cameras (and zoom
lenses).

You've been watching too much "Spooks".

I never had a problem with spooks following people on CCTV

It was the way that there was always magically a "new" real person to take
over regardless of the route that the perp took, that was unbelievable.

tim


--
Roland Perry