Network Video Recorder Administrator’s Manual
108
Video Adjustment Attributes
Field Name
Description
Brightness(1-100)
Defines how much portion of light and of dark appear in the image. As the
value increases, the image appears brighter, and vice versa.
Contrast(1-100)
Defines the range level between light values and dark values. As the value
increases, the separation between light and dark becomes more obvious.
Saturation(1-100)
Defines the level of the actual color intensity. As it increases, colors appear
more pure; as it decreases, colors appear more gray-out.
Hue(1-100)
It is the term used to refer to the pure spectrum colors. Adjust this value to
find the color closest to the real scene.
Line Frequency
( 50Hz / 60 Hz)
The unction that adjusts the shutter speed options to match the frequency of
artificial light source of given country. For example, in Europe the light
frequency (due to power supply frequency of lights) is 50Hz, that is 50
flashes per second. By setting line frequency to 50Hz in such case, the
shutter speed options will be proportional with light source frequency, such
as 1/25s, 1/50s, 1/100s, etc. It is necessary to have the camera’s Line
Frequency adjusted according to the power frequency of the light source to
avoid flickering effect.
