Introducing
the technology of Day & Night camera. Frequent asked
questions : |
- What is Day and night camera? What is IR camera?
Are both having the same function and feature?
- What is color-killing camera?
Quoted from reputable CCTV manufacturer in South Korea,
Day & Night(D&N) camera is categorized into
3 levels and the option of with and without IR LEDs.
|
| |
Technology |
Day & Night
Camera |
 Color Separation (optional of with or without IR LEDs) |
 Color Killing (optional of with or without IR LEDs) |
 Filter Change (optional of with or without IR LEDs) |
For all D & N camera, when camera is in sufficient
light; it display color image. Insufficient light levels,
will turn into black & white.
IR LEDs are added in to help the camera to see in the
dark. |
 |
 |
 |
Color Suppression |
Color Killing |
Filter Change |
When camera recognizes that the light level is not
enough to display color image, it will automatically
turn color image into lighter condition.(not
black & white).
The disadvantages of the Color separation camera are:
- Color representation is poor, i.e.: it will turn
red into pink or orange.
- Picture quality is poor in dark due to the color
noise still present.
|
When camera
recognizes that light level is not enough, it will
turn color to monochrome completely by killing the color
burst.
As losing the color burst completely, the picture quality
will become clearer in b/w mode. |
The true
D & N mode having 2 different filters built in :
OLPF filter in the day and GLASS filter during the
night.
When light level is not enough, the camera will turn
into b/w by color killing and changes the OLPF to
Glass Filter mechanically.
As Glass filter has 20~30% higher light transparency
than OLPF, D&N cameras with filter change technology
has the best picture quality and performance of all. |
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