Banner PresencePLUS P4 COLOR Series - Manual (Page 148)

The bottom graph, Edge Strength, represents the change in gray scale along the Edge tool.
Edge Strength detects an edge when the rate of change (solid red line on the screen) crosses the selected intensity
change amount (dashed green lines on the screen).
A bright-to-dark transition has a negative edge strength value, and a dark-to-bright transition has a positive edge strength
value. When the Edge Strength level is adjusted, both the negative and positive lines will adjust together.
Graph Tab
Banner Engineering Corp. Minneapolis, MN USA 148
2/2010 PresencePLUS Software Tools