Axis Q8685-E User Manual page 26

AXIS Q8685-E PTZ Network Camera
About video settings
Set Gain to:
• Auto to set the gain automatically. If required, use Max gain to limit the applied gain.
• Fixed to use a fixed gain.
Example
If storage space or bandwidth is limited, try using a lower gain. This will reduce image noise and produce smaller image files.
How to set up normal and low light
When Shutter and Gain are both set to Auto, it is possible to set the Priority between low motion blur and low noise manually and to
use a different Priority in Normal Light and in Low Light.
Example
Consider an area where people or vehicles move during the day, but where there should be no movement at night. To be able to,
for example, recognize faces or license plates, move the normal light priority slider toward low motion blur. At night time, motion
detection is more important than identification. Motion blur is acceptable and since low light can cause a lot of noise, move
the low light priority slider toward low noise.
Normal light priority
1. Use the slider to set the Priority between Low motion blur and Low noise. When prioritizing low noise (slider all the way
to the left), the camera will automatically decrease shutter speed as brightness decreases. When the shutter speed reaches
1/30 s, the camera increases gain until the set maximum gain for normal light is reached.
Low light priority
2. Use the slider to set the Priority between Low motion blur and Low noise. When prioritizing low motion blur (slider
all the way to the right), the camera automatically increases gain as brightness decreases. When the gain reaches the
set maximum gain for low light, the camera will decrease shutter speed until the set maximum shutter for low light is
reached. This is the default priority setting for low light.
3. Select the Max gain value from the drop-down list. This defines the upper limit for gain in the context of normal light.
4. Max fast shutter sets the shutter speed limit in normal light. Depending on the scenario, the shutter speed limit may need
to be defined. This is done through System Options > Advanced > Plain Config.
Day/Night
The IR cut filter prevents infrared (IR) light from reaching the image sensor. In poor lighting conditions, for example at night, or when
using an external IR lamp, set the IR cut filter to Off. This increases light sensitivity and allows the product to "see" infrared light. The
image is shown in black and white when the IR cut filter is off.
If using automatic Exposure control, set the IR cut filter to Auto to automatically switch between On and Off according to the
lighting conditions.
WL illumination
WL illumination can be activated or de-activated from the product's Live View page.
About image settings
Stabilizer - When monitoring environments that are subject to vibrations (e.g. traffic control), images may appear to be unsteady.
Select On to steady the image. See the online help
Image freeze on PTZ - Select All movements to freeze the image while the camera is moving during a pan, tilt or zoom operation.
Once the camera reaches its new position, the view from that position is shown. Presets freezes the image only when the camera
moves between preset positions.
for more information.
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