Vivotek IP8355H User Manual page 53

Exposure control:
■ Exposure level: You can manually set the Exposure level, which ranges from -2.0 to +2.0 (dark
to bright). You can click and drag the pointers on the Exposure time and Gain control slide
bars to specify a range of shutter time and Gain control values within which the camera can
automatically tune to an optimal imaging result. You may prefer a shorter shutter time to better
capture moving objects, while a faster shutter reduces light and needs to be compensated by
electrical brightness gains.
■ Exposure mode:
Auto: If you set Exposure mode as Auto, the Exposure time and Gain control will not be
configurable since the sensor library will automatically adjust the value according to the ambient
light. Then you can set iris mode as "indoor" or "outdoor" to reach the best image quality.
■ Iris mode: Select Indoor or Outdoor iris mode to adapt to the installation. The preset iris
aperture setting will apply.
Manual: (Note that some of the Manual options will be disabled when WDR Pro is
enabled!)
■ Iris Adjustment (available in the Manual mode): The camera comes with a P-iris lens, which
controls the iris opening with extreme precision by its built-in stepping motor. Via software
controls, the lens maintains the iris opening at an optimal level at all times, resulting in superior
sharpness and depth of field as well as image quality.
You can manually tune the value of iris opening (aperture size), which can range from 0
(Close. smallest aperture size) to 100 (Open, largest aperture size).
Once set, the iris will stay at current position as long as the lighting condition allows. When
external lighting conditions exceed an acceptable range, the P-iris mechanism adjusts itself.
■ Exposure Time: The configurable max. exposure time is tunable according to lighting conditions
with values ranging from 1/10000 to 1/5 of a second.
■ Gain Control: Tune the slider bar to set the Gain Control to the best image quality. Higher gain
control value will generate a certain amount of noises.
You can click Restore to recall the original settings without incorporating the changes. When
completed with the settings on this page, click Save to enable the settings.
■ WDR Pro : When enabled, you can select the strength of the WDR function. The Low, Medium,
High options correspond to the level of contrast between the overly-lit area and the shaded areas.
For example, the High option applies to a high contrast scenario. Note that when the exposure
time is set to longer than 1/60 second, the WDR function will be disabled.
The Sensitivity option applies to the response speed to the change in bright-to-dark lighting
contrast.
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User's Manual - 53