Siqura C-60 E-MC, User Manual, Page: 93 / 142

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Page 87
10.4.9.3 Position measurement
Position Measurement settings
After creating one or more reference images you can configure the Position Measurement
settings to define thresholds for allowed camera movement and image matching.
Configure Position Measurement
Enable Select or clear to enable or disable the Tampering Detection functionality,
respectively.
Match threshold The current image and the reference image it is compared with are considered a
match upon reaching the degree of similarity specified here. The lower the
percentage entered for this parameter, the fuzzier the match.
Match hysteresis This is the margin area where there is either a match or no match, depending on
the preceding match level. If your alarm output frequently alternates between
"true" and "false" you can use this parameter to fine-tune your settings. For more
information on hysteresis, see also Dial legend (on page 78).
Position threshold Determines the amount of camera movement that is allowed before a position
alarm is raised. Raising this value allows more camera movement. This is
indicated by the increased size of the green circle in the center of the image.
Evaluation rate The value entered here determines the speed at which the host machine
processes the algorithms underlying the measurements. Higher values take up
more CPU power.
Defaults Restores the original settings. Does not affect the current activity status of the
Tampering Detector (i.e. being Enabled or Disabled).