Adept AdeptSight User Guide - Manual (Page 282)

Properties
Object Definition
Rotation The rotation of the region of interest
Average Contrast Average contrast between light and dark pixels on
either side of the found arc, expressed in grey-
level values.
Fit Quality Normalized average error between the calculated
arc or line entity and the actual edges matched to
the found entity. Fit quality ranges from 0 to 1,
with 1 being the best quality. A value of 1 means
that the average error is 0. Conversely, a value of
0 means that the average matched error is equal
to Conformity Tolerance.
Match Quality Percentage of edges actually matched to the
found arc. Match Quality ranges from 0 to 1, with
1 being the best quality. A value of 1 means that
edges were matched for every point along the
found entity. Similarly, a value of 0.2 means
edges were matched to 20% of the points along
the found entity.
Properties
Fit Mode
Fit Mode specifies the mode used by the tool to calculate and return values for the found arc.
There are three modes for fitting hypotheses to a valid arc entity.
l
Both: The Arc Finder calculates and returns both the arc center and the arc radius.
This is the default mode, which will typically provide the most accurate results.
l
Center: The Arc Finder calculates the arc center. The returned center point values are
the tool center (i.e. Arc X and Arc Y).
l
Radius: The Arc Finder calculates the arc radius. The returned Radius value is the tool
radius.
Minimum Arc Percentage
Minimum Arc Percentage sets the minimum percentage of arc contours that need to be
matched for an arc hypothesis to be considered as valid.
Polarity Mode
Polarity Mode sets the mode that will apply to the search for entities. Polarity identifies the
change in grey-level values along the tool’s X axis, in the positive direction.
AdeptSight User's Guide, Version 3.2.x, Updated: 8/23/2012
Page 282