Line Finder 0 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: l Dark To Light: The Line Finder searches only for lines occurring at a dark to light trans- ition in grey-level values. l Light To Dark: The Line Finder searches only for lines occurring at a light to dark trans- ition in grey-level values. l Either: The Line Finder searches only for lines occurring either at a light to dark or dark l Don’t Care: The Line Finder searches only for lines occurring at any transition in grey- to light transition in grey-level values.
This mode will increase processing time. level values including reversals in contrast, for example, on an unevenly colored back- ground. Search Mode Search Mode specifies the method used by the tool to generate and select a hypothesis. The available modes are: l Best Line: Selects the best line according to hypotheses strengths. This mode will increase processing time. l Line Closest To Guideline: Selects the line hypothesis closest to the Guideline. l Line With Maximum Negative X Offset: Selects the line hypothesis closest to the Rect- angle bound that is at maximum negative X offset. l Line With Maximum Positive X Offset:
Selects the line hypothesis closest to the Rect- angle bound that is at maximum positive X offset. Region of Interest (ROI) Most tool position parameters can be set through the ROI section of the tool interface. The fol- lowing parameters define the tool region of interest. ACEUser's Guide, 3.6.x, 18316-000 Rev A Page 551 Object Definition Offset Offset is the offset from the tool X-axis, defined by: X The X coordinate of the center of the region of interest.