Arc Finder 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. The available modes are: Search Mode Search Mode specifies the mode used by the tool to generate and select a hypothesis. The available modes are: Region of Interest (ROI) Most tool position parameters can be set through the Region of Interest section of the tool interface. The following are the parameters that define the tool region of interest:
ACEUser's Guide, 3.6.x, 18316-000 Rev A Page 393 Mode Description Dark To Light The Arc Finder searches only for arcs occurring at a dark to light transition in grey-level values. Light To Dark The Arc Finder searches only for arcs occurring at a light to dark transition in grey-level values. Either The Arc Finder searches only for arcs occurring either at a light to dark or dark to light transition in grey-level values. This mode will increase pro- cessing time. Don’t Care The Arc Finder searches only for arcs occurring at any transition in grey-level values including reversals in contrast, for example on an unevenly colored background.
Mode Description Best Arc Selects the best arc according to hypotheses strengths. This mode will increase processing time. Arc Closest To Guideline Selects the arc hypothesis closest to the Guideline. Arc Closest To Inside Selects the arc hypothesis closest to the inside of the tool Arc (closest to the tool center). Arc Closest To Outside Selects the arc hypothesis closest to the outside of the tool Arc (farthest to the tool center).