Auto Exposure; Table 4-10 Auto Exposure Settings - Honeywell HCD5HIH Reference Manual

IP Camera Web Client

Auto Exposure

Setting Options
ELC (Electronic Light Level 1–25
Compensation)
ALC (Automatic Light DC Iris Level: 1–25 For ALC, the shutter speed is constant and brightness is controlled
Compensation)
(HCD5MIH(X) and
HCD5HIH(X) only)
AGC (Automatic Gain Off, 20 dB–40 dB
Control)
DNR (Digital Noise Off, Auto, Fixed
Reduction)
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b. If the delivered bit rate is close to the maximum bit rate, then can you
increase the maximum bit rate value?
Yes - Then increase the maximum bit rate and return to 5a.
No - Then set the compression ratio to High or Maximum, then return to 5a.
c. Can you increase the target bit rate value?
Yes - Then increase the target bit rate, and return to 5a.
No - Then reduce the resolution and/or frame rate.
The Auto Exposure settings allow the user to access and configure exposure-related
settings as described in Table
Note You must click Apply after you make changes to any settings to save those
changes. Settings are not saved unless you click Apply.
Table 4-10 Auto Exposure Settings
Description
For ELC, the lens iris is fully open at all times and brightness is achieved
by controlling the electronic shutter. Select an ELC level to attain the
desired scene brightness. ELC is recommended for outdoor scenes.
through the lens iris by opening or closing it.
Adjust the ALC level to the appropriate value so that the image is
correctly exposed (neither too bright nor too dark). This is
recommended for indoor scenes, especially under fluorescent light.
Adjust the maximum value of AGC gain. AGC can be Off, or set to
20 dB, 30 dB, or 40 dB.
Note As AGC levels are reduced, the threshold ranges for DayToNight
and NightToDay are decreased.
Improves picture performance in low light by reducing video noise.
DNR will remove video noise, but will also soften the image.
Off - DNR is turned off.
Auto - DNR is automatically controlled by the firmware according to
changes in the lighting condition.
Fixed - DNR is manually set to the highest value regardless of changes
in the lighting condition. You will get the least video noise (dots), but the
softest image.
DNR is deactivated if AGC is turned Off.
4-10.