Banner PresencePLUS P4 EDGE 1.3 Series - Manual (Page 105)

Adding an Edge Tool
Threshold Type
The threshold is used to mark the gray scale transition point. The tool marks the edge when the pixel intensity
crosses the threshold level. From the dropdown list, select one of the following:
• Relative
• Absolute
• Edge Strength
Relative Threshold
Relative threshold is the default, and it finds an edge at a relative pixel intensity. The brightest gray scale level
is 100% and the darkest is 0%. While Relative threshold is more tolerant of light fluctuations between inspections
than other transition types, it may find false edges.
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PresencePLUS Software Tools 7/2009