Banner PresencePLUS Pro COLOR—PROII Camera - Manual (Page 111)

Description Field
If left unchecked (disabled), the Sensor will find a target shape that might have extra
edges. If checked (enabled), the Sensor will not find a target shape that has extra edges
of a specified length. The size of the minimum edge length is adjustable.
Extra Edges
Note:
If checked, the application will not allow a minimum edge length to be set
below the number specified for Minimum Edge Length (in the Input tab ) for this
tool.
If left unchecked (disabled), then the Sensor will find a target shape, even if it is missing
some edge content. If checked (enabled), then the Sensor will not find a target shape that
Missing Edges
is missing edges of a specified length. The size of the minimum edge length to check for
is adjustable.
Note:
If checked, the application will not allow a minimum edge length to be set
below the number specified for Minimum Edge Length (in the Input tab ) for this
tool.
Minimum Acceptance Level
This adjustment sets the acceptance level for pattern matches.
• Decrease the Minimum Acceptance Level to allow more variations in matching patterns.
• Increase the Minimum Acceptance Level to filter out patterns that contain small defects.
Percent match is a value between 20% and 100% that indicates the quality of the match (100% is a perfect match; 20%
is a slight match). The percent match can be used to detect large defects.
Note:
Banner does not recommend setting the Minimum Acceptance Level below 70%.
Reject Threshold
These adjustments allow the user to set the “band of gray scale values” the tool uses to determine the threshold when
Adaptive Threshold is specified.
If the Low is set to zero (default) and the High is set to 255 (default), then all gray scale values within the acquired
image are used to determine the threshold.
An example of narrowing the band of gray scale values is to set the Low at 50 and the High at 200. With these settings,
only gray scale values from 50 to 200 will be used by the Geometric Find tool to determine the threshold when Adaptive
Threshold is specified.
These controls allow the user to “block” dark spots or light spots from influencing the threshold in the image acquired
by the Sensor.
111 Minneapolis, MN USA Banner Engineering Corp.
PresencePLUS Software Tools 2/2010