DF4510HD | DF4910HD | DDF4510HDV-IM/-SM | DDF4910HDV-IM/-SM
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exposure/WB
To reproduce accurate colours, regardless of the prevailing light sources and colour tem-
peratures (measured in Kelvin), a correct white balance is required.
For this purpose, the camera provides two white balance modes:
•
Auto
ATW (Auto Tracking White Balance)
This white balance setting automatically determines and permanently readjusts the
white balance value output using colour information from the entire scene in order to
continually compensate for colour temperature changes in varying light conditions.
For best results, at least one white object (as reference white) should be within the
scene that is to be captured.
The use of ATW is especially recommended for scenes with permanently varying light-
ing situations/colour temperatures, such as indoor scenes with artificial light sources
and incident daylight.
•
one Push
AWB (Automatic White Balance)
The “One Push” white balance value is a fixed measured value which is only readjusted
at user request (
Apply
button), assuming that a white or neutral grey object (as refer
-
ence value), in correct lighting conditions, is located in more than a half of the entire
image.
color
•
Automatic
This setting provides the automatic switching between colour and black-and-white
mode as lighting conditions change.
The switching depends on the ambient light level, i.e. at low light levels the camera
automatically switches to black-and-white mode and removes the colour burst.
Without colour information, or rather in black-and-white mode, the image quality in low
light conditions will be much clearer (e.g. less colour noise).
Depending on the ambient light (when a certain brightness level has been reached
again), the camera automatically switches back to colour mode.
•
on
The video is always displayed in colour, even at low light levels.
•
off
The video is always displayed in black-and-white.
Slow Shutter Limit
For a proper exposure, the camera automatically determines the best combination of
shutter speed, aperture and signal gain.
The slow shutter limit thereby defines the maximum allowable automatic exposure time
(electronic shutter speed).
As soon as the set shutter limit has been reached, the automatic exposure (AE) is exclu
-
sively controlled by the automatic iris (aperture) control and/or the automatic gain control
(AGC).
Noise filter
This setting can improve the image quality by reducing noise in signal processing.
In scenes with lots of complex objects, enabling this function, however, may lead to a loss
of detail in the image.
The noise filter described here can be enabled at all resolutions.
