Siqura TC620-PID, Руководство пользователя

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TC620-PID
Page 92
12.9.7 Delete a reference image

To delete a reference image
1. In the VCA Settings section, open the
Reference image
list.
2. Select the image you wish to delete.
3. Press
Clear reference
.
Note that the Clear all button deletes all available references.
12.9.8 Position measurement
Video > Tamper Detect > Position Measurement
After creating one or more reference images you can configure the Position Measurement
settings to define thresholds for allowed camera movement and image matching.
Item Description
Enable Enables Tamper Detect functionality.
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.
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
Tamper Detect - that is, being Enabled or Disabled.