CCTV or Closed Circuit Television, as the world is full of this
surveillance beauty capturing things with some purpose.
With the increasing product range
available in the marketplace, and technology constantly improving to provide
great performance, reliability and functionality, that meet the requirements
for the job, understanding the many variables within CCTV camera technology
available at us today helps you in making the right choice.
There are many factors that come in
its operation like the technical specification, the application and any
physical constraints, required.
Converting light into an electrical
signal is a CCTV camera technology called Charge Coupled Device (CCD)
sensor. The camera electronics processes the electrical signal and
converts to a video signal output which is either recorded or displayed on to a
monitor. The video signal is depended on the type of camera which may be
divided into: analogue or digital versions, which further are divided into
medium resolution monochrome, medium resolution colour, high resolution
monochrome, high resolution colour, day/night cameras that provide colour in
the day and monochrome at night.
The Monochrome or Colour Cameras,
where Colour Camera offers Infra Red (IR) sensitivity meaning your image
to appear in black and white that are capable of giving higher detail images
and sensitivity than would otherwise be possible with color.
Colour cameras with premium in price
as compared with monochrome cameras are also less sensitive unless good
lighting is available during night, but is easier to recall better, when
things appear in colour.
Producing good quality images at an
affordable price are the work of analogue cameras, but post the introduction of
Digital Signal Processing (DSP) the flexibility in security cameras has
increased enhancing the quality of the colour images produced. The DSP
comes in standard and premium category that offer more picture
quality than the analogue cameras and function in various conditions. In the Premium
segment there are functions available like Video Motion
Detection, remote set up and control using a serial data link, built in
character generator having on screen menus. Standard DSP cameras are used in
certain situations too.
CCD chips what the Surveillance
Cameras use, gives the highest sensitive and resolution image due to the reason
that they are able to gather more light. They have brothers, of half-inch,
quarter, third inch size with cost, performances:
Quarter-inch cameras available at a
low cost and not so good performance,
Half-inch give premium performance
but are more expensive,
Third-inch cameras are of mid level
cost and are used too much in today's' market.
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