Adept AdeptSight User Guide - Manual (Page 353)

Edge Pair Parameters
There are two criteria that affect the choice of valid edges: Polarity and Edge Score Con-
straints.
Polarity
Polarity corresponds to the change in light values, moving from left to right in
the display, along the X-Axis in the region of interest. The caliper applies the
Polarity constraint before applying edge-score Constraints.
Polarity does not affect the edge score, but only edges that meet the selected
Polarity are retained as valid edges, regardless of their scores.
l Dark to Light will only accept edges occurring at transitions from a dark
area to a light area.
l Light to Dark will only accept edges occurring at transitions from a light
area to a dark area.
l
Either will accept any edge, regardless of its polarity.
Edge Polarity
Edge Score Constraints
There are two types of constraints: Position and Magnitude. You can set the cal-
iper to use only one constraint or both. The graphical Function Editor is pro-
vided for viewing and setting each type of constraint.
l
If only one constraint is selected, edges are scored based on the selected
constraint.
l
If both constraints are selected, each constraint accounts for 50% of the
edge score.
Magnitude Constraint
The Magnitude constraint is based on edge values relative to the Magnitude
Configuring Caliper Properties
AdeptSight User's Guide, Version 3.2.x, Updated: 8/23/2012
Page 353