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AXIS Q3505–V Fixed Dome Network Camera
Video and Audio
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
rare light conditions disabling WDR might give a better image.
Important
Use WDR in combination with automatic exposure control. Other exposure settings could give undesirable results.
Note
WDR is only available if you have selected a capture mode that supports WDR. See Congure Capture Mode on page 10.
Exposure Settings
Congure the exposure settings to suit the image quality requirements in relation to lighting, frame rate and bandwidth
considerations.
Exposure value - Use the Exposure value slider to adjust the overall brightness of the image.
Exposure control - This setting is used to adapt to the amount of light used. Automatic is the default setting and can be used in
most situations. The shutter speed is automatically set to produce optimum image quality. Flicker-free 50 or 60 Hz is used to remove
icker which can be caused by uorescent and other light sources. The Hold current option locks the current exposure settings.
Max exposure time - Decreasing the exposure time will reduce motion blur. For more information, see the online help
Enable Backlight compensation - Enable this option if a bright spot of light, for example a light bulb, causes other areas in
the image to appear too dark.
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. For particular requirements, select a predened area.
Shutter & Gain
The shutter and gain settings affect the amount of motion blur and noise in the image. To adapt to different lighting, available
storage space and bandwidth, it is often necessary to prioritize either low motion blur or low noise. The Axis product allows
using different prioritization in normal light and in 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 situations. On the other hand, a slow shutter
speed can cause moving objects to appear blurry.
Set Shutter to
• 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 xed shutter speed.
Gain, measured in decibel (dB), is the amount of amplication applied to the image. A high gain may provide a better image in low
light situations but will increase the amount of image noise.
Set Gain to
• Auto to set the gain automatically. If required, use Max gain to limit the applied gain.
• Fixed to use a xed gain.
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
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