Network Camera User’s Manual
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local utility. Change the frequency setting to eliminate uncomfortable flash image when
the light source is only fluorescent light.
4.
“Video orientation”
The orientation of video
(1)
“Flip”
Vertically rotate the video.
(2) “Mirror”
Horizontally rotates the video.
5.
“Low lux mode”
The video quality will be improved when the camera is in low lux
environment.
Video Setting
Advanced Mode
1. Exposure setting
Here it provides 3 mode:
Auto
,
BLC
and
HSBLC
.
Auto
and
HSBLC
modes are 2
default settings for general purpose and backlight scene, respectively.
“Target Luminance and Offset”
These two slide bar,
Target Luminance
and
Offset
represent the expected target value
of the luminance of the weighting result of AE windows in the image and its tolerance as
offset. For example, target luminance is set to 100 and target offset is set to 20 that
means the average luminance of the AE window should be in the range from 80 to 120
(100±(10. When the actual luminance does not meet this range, the AE function will
adjust shutter and gain to meet it as possible. In some extreme cases, it cannot reach
the target because the environment is too
bright or dark. When the environment is not consistent, e.g. with big moving objects, and
the offset is too narrow, the AE will act more frequently that will cause the background of
view inconsistent. The offset value is recommended to set 15~25% of target luminance.
“Shutter Speed”
There are 2 fields, minimal and maximal time, for the range of Shutter Speed. The
precision of the parameter is 1/50000 sec., but it is
NOT
actual precision of the shutter
speed of the sensor. The actual precision of the shutter speed depends on each
sensor’s specification. Here it will be rounded to approach sensor’s effective exposure
time. To avoid flickering or banding phenomenon under fluorescent light, the actual
shutter speed will be locked at 1/120, 1/60, 1/30 if
Power Line Frequency
is 60Hz, or
1/100, 1/50, 1/25 if
Power Line Frequency
is 50Hz. The setting of
Power Line
Frequency
is on the sub-tab Video and Audio. The exposure may not be stable if the
maximum value and the minimum one are set to the same value without adjustable
interval. Besides, the frame rate will drop down if the actual shutter speed is too slow to
meet expected frame rate.
