CCTV Cameras

CCTV Cameras

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Subject Author Date
CCTV Cameras Socrates 08-26-2005
Posted by Socrates on August 26, 2005, 1:38 pm
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A cctv camera will never provide good quality because the resolution,
sensor chip and lens quality are nowhere near as good as a digital
stills camera.

So connect a digital stills camera to your laptop or pc and you will
obtain wonderful clear images of the camera scene for cctv purposes.

See sample images on the website below. They are the clearest cctv
images in the world.

www.londoncctv.com



Posted by Jackcsg on August 26, 2005, 7:12 pm
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Awesome! I can't think of a single application where a laptop computer with
an expensive single frame Digital Camera could be utilized in a real world
surveillance situation. At least you'd have the "flash" for covert night
operations...
I think you're a little confused...but do let us all know how your marketing
campaign goes...


> A cctv camera will never provide good quality because the resolution,
> sensor chip and lens quality are nowhere near as good as a digital
> stills camera.
>
> So connect a digital stills camera to your laptop or pc and you will
> obtain wonderful clear images of the camera scene for cctv purposes.
>
> See sample images on the website below. They are the clearest cctv
> images in the world.
>
> www.londoncctv.com
>




Posted by Bob La Londe on August 26, 2005, 6:16 pm
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> Awesome! I can't think of a single application where a laptop computer
> with
> an expensive single frame Digital Camera could be utilized in a real world
> surveillance situation. At least you'd have the "flash" for covert night
> operations...
> I think you're a little confused...but do let us all know how your
> marketing
> campaign goes...
>


Actually even a cheap digital camera has better resolution than the average
CCTV camera. Even the expensive CCTV cameras aren't all that great IMO.
Its always been a tough for sell for me when a camcorder provides better
video quality than a CCTV camera. In fact years ago because of this we
setup an old camcorder camera for the check cashing line at my parents
grocery store. It was one of those with an recorder carried on a shoulder
strap. We modified it to go to a regular recorder, and it worked great for
many years of continuous service.

We as an industry are deluding ourselves if we want to compare CCTV imaging
to digital cameras, most camocredrs or any digital camcorder. With SVHS and
HI-8 recorders as cheap as they are these days I can't understand why CCTV
cameras cost so much to get a fraction of the resolution and still have to
be tweaked and adjusted for a particular application.

Even so I tend to only use the better res cameras. The only positive is the
cameras we use today are so much better than the cameras we used 15 years
ago that commercial customers are still pleased with the improvement. Well
atleast commercial customers who had cameras 15 years ago. LOL


--
Bob La Londe

Win a Tackle Pack
Jig Fishing - Tips and Techniques Contest
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Posted by Jackcsg on August 26, 2005, 11:25 pm
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>
> > Awesome! I can't think of a single application where a laptop computer
> > with
> > an expensive single frame Digital Camera could be utilized in a real
world
> > surveillance situation. At least you'd have the "flash" for covert night
> > operations...
> > I think you're a little confused...but do let us all know how your
> > marketing
> > campaign goes...
> >
>
>
> Actually even a cheap digital camera has better resolution than the
average
> CCTV camera. Even the expensive CCTV cameras aren't all that great IMO.
> Its always been a tough for sell for me when a camcorder provides better
> video quality than a CCTV camera. In fact years ago because of this we
> setup an old camcorder camera for the check cashing line at my parents
> grocery store. It was one of those with an recorder carried on a shoulder
> strap. We modified it to go to a regular recorder, and it worked great
for
> many years of continuous service.
>
> We as an industry are deluding ourselves if we want to compare CCTV
imaging
> to digital cameras, most camocredrs or any digital camcorder. With SVHS
and
> HI-8 recorders as cheap as they are these days I can't understand why CCTV
> cameras cost so much to get a fraction of the resolution and still have to
> be tweaked and adjusted for a particular application.
>
> Even so I tend to only use the better res cameras. The only positive is
the
> cameras we use today are so much better than the cameras we used 15 years
> ago that commercial customers are still pleased with the improvement.
Well
> atleast commercial customers who had cameras 15 years ago. LOL
>
>
I'm pretty impressed with the resolution I get off most of the Network
Cameras we use.
When you place a 470 line resolution camera on a 380 line resolution
monitor...that's the effects most customers see. The digital chip sets are
certainly much better, but you also get what you pay for. Panasonic makes a
970 lines resolution camera, but at $975 a camera (fixed)...if there are
used in the right application, with the right lens, displayed on the right
monitor?
Most CCTV installs are always the low bid, at low to medium specifications.
You get what you pay for. Cameras serve their purpose...unless you're a
photographer. Then nothings good enough.




Posted by Socrates on August 27, 2005, 8:31 am
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Panasonic makes a
970 lines resolution camera, but at $975 a camera (fixed)...if there
are
used in the right application, with the right lens, displayed on the
right
monitor?

If you display any image from a CCTV camera on a VGA monitor you will
get a nice clear view of the camera scene.

You are however simply monitoring the live feed from the camera -you
are not looking at the saved images or video which has to be converted
from an analogue TV-lines-signal to a digital compressed file - and
therein lies the problem.

In the capturing, conversion and compression of an analogue signal
coming from an analogue CCTV camera, you end up with a dog's dinner of
an image, so that in almost all cases it is impossible to identify the
people in the image unless they are standing completely still right in
front of the camera with their nose pressed to the lens!

This is so even when the video camera is a digital "megapixel" variety,
as in a network ip camera. The resolution of 2 megapixels together with
a slow shutter speed and inferior lenses used in the technology mean
that one cannot obtain clear enough images of people's faces - one can
only get a general impression for example of a car park - one cannot
see the car number plates or other levels of detail.

If however you connect a simple digital stills camera such as a Canon
Powershot S2iS via a USB cable to a laptop or pc, which can reside
under the shop counter on in a cupboard in your home, it will capture
stunning pictures of anyone in the camera scene, even if they are
running past the camera.

This is because you are able to set the shutter speed to 1/125th of a
second, and the sensor on a digital stills camera is at least 4
megapixels even on a cheap version. The technology and lenses are also
geared up for taking clear images, whereas digital video cameras are
more geared up for simple monitoring purposes - not for saving clear
sequential jpg images of a camera scene.

www.londoncctv.com



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