Axis Communications Axis 211A - Manual (Page 23)

23 AXIS 210A/211A - Video & Image settings
Camera Settings
Low Light Behavior
Low light conditions can reduce image quality and increase bandwidth usage. The Low
Light Behavior settings define the balance between image quality and frame rate. During
low light conditions, experiment with the Priority, Max exposure time, and Max gain
settings until you achieve an acceptable image quality at the required frame rate.
Priority defines the balance between image quality and the frame rate. Higher image
quality may reduce frame rate and increase motion blur. A prioritized frame rate may
increase image noise.
Increasing the Max exposure time increases the quality of the image, but decreases the
frame rate. There may also be increased motion blur.
Max gain, measured in decibels (dB), describes the amount of amplification applied to the
visual information in the image. A high level of amplification provides viewable images in
very low light, but increases image noise.
To prioritize image quality, choose Prioritize image quality from the Exposure priority
drop-down box, and lower the Max gain. If this does not produce the desired results,
increase the Max exposure time.
To instead prioritize frame rate, choose Prioritize framerate from the Priority drop-down
box and reduce the Max exposure time. The image darkens considerably, but the frame
rate is maintained. To increase image brightness increase Max gain, but this increases
image noise.
Please refer to the online help for more information.