2 Mega-pixel PoE Plus Speed Dome IP Camera
ICA-E6260
96
In extreme low light conditions, the shutter speed is slown down to get more light into one
image, but not slower than the user defined threshold.
If the exposure time extends beyond the interval between frames (too slow shutter), (i.e. 1/30
second), then the frame rate will be automatically reduced.
Longer time in this value gives
clearer images at night for slow moving objects, but more motion blur for fast moving
objects.
White balance
refers to the capability of the camera to understand what “true white color is”.
When the camera knows the true white color, then the rest of the colors will be accurate, too.
While human eye can easily adapt to different lighting sources (even mixed sources, such as
sun light through the window and indoor lights turned on at the same time), the camera has
to understand what is the dominant light source in given scene and what is the “white color”
of such light source.
By default, the camera is in
auto white balance
mode and attempts to recognize the light
source and its color spectrum automatically and adjusts the image accordingly. This function
works continuously in the background. It is re-evaluated for each frame, to make sure if there
is any change in dominant light source (e.g. the user closes the curtains to block the sun light
and turns on the indoor lights).
In most cases the auto white balance works perfectly and the user does not have to adjust
anything! In some rare installation cases, especially when there are no white color objects in
the field of view, and the light sources are mixed, the camera may have difficulty to identify
the true white color to fine tune the rest of the colors.