Axis Q8685-E User Manual page 25

AXIS Q8685-E PTZ Network Camera
About video settings
Local Contrast applies contrast to a specific area of the image. Use the slider to adjust the contrast, where a higher value produces
an image with high contrast between the dark and light areas and is suitable for scenes with wide dynamic range.
About white balance
To change this setting go to Setup > Video > Camera Settings
White balance is used to make colors in the image appear the same regardless of the color temperature of the light source. The Axis
product can be set to automatically identify the light source and compensate for its color. Alternatively, select the type of light
source from the drop-down list. For a description of each available setting, see the online help
Wide Dynamic Range
Wide dynamic range (WDR - Forensic Capture) provides balanced images in scenes when there is a considerable contrast between
light and dark areas in the image. The camera automatically handles the transition between such scenes and low-light conditions. In
complex light conditions disabling WDR might give a better image.
Important
Use WDR in combination with automatic exposure control. Other exposure settings could produce undesirable results.
Exposure Settings
Exposure is the amount of light the camera's sensor captures for a scene. Too much light results in a washed out image and too
little light results in a dark image.
Exposure value - Use the Exposure value slider to adjust the overall brightness of the image.
Exposure zones - This setting determines which part of the image is used to calculate the exposure. For most situations, the Auto
setting can be used.
You can select a predefined area by defining Include and Exclude windows within the image. Exclude windows exclude areas that are
too bright or dark, and Include windows include areas in the scene that have better lighting which will contribute to the exposure data.
There must be at least one Include window. There can be a total of ten Include and Exclude windows to tailor the exposure zone.
Note that an Exclude window is effective only when placed inside an include window.
Tip: If an area is extremely bright, draw an Include window to cover the whole area and define Exclude windows within it to
block out the bright areas.
Shutter & Gain
The shutter and gain settings affect the amount of motion blur and noise in the image. To adapt to different lighting conditions,
available storage space and bandwidth, it is often necessary to prioritize either low motion blur or low noise. The Axis product allows
different prioritizations in normal and low light.
Shutter speed is related to the amount of time the shutter is opened and is measured in seconds (s). A slow shutter speed allows
more light to reach the sensor and can help produce a brighter image in low light. On the other hand, a slow shutter speed can
cause moving objects to appear blurry.
Set Shutter to:
Note
Set the Wide Dynamic Range to WDR Off before changing the shutter speed.
• Auto to set the shutter speed automatically. If required, use Max shutter to limit the shutter speed to prevent the frame
rate from being reduced.
For example, to get 30 fps, set Max shutter to 1/30.
• Fixed to use a fixed shutter speed.
Gain, measured in decibel (dB), is the amount of amplification applied to the image. A high gain may provide a better image in low
light but will increase the amount of image noise.
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