Banner PresencePLUS P4 COLOR Series - Manual (Page 161)

Description Field/Graph
In the Edge Profile graph displayed when the Relative threshold is selected, the red line
shows the percentage pixel intensity relative to the green threshold line. The threshold
line will move up or down with the percent value. Edge Profile Graph
Absolute Threshold
Absolute threshold finds an edge at a specific gray scale level. While Absolute threshold is less likely to find a false
edge than Relative Threshold, it may miss edges if the light level changes between inspections.
Description Field/Graph
Value is displayed when Type is Absolute. Enter a specific gray scale value from 0 to
255. Value
Polarity
• Bright to Dark finds edges that start above the threshold value and cross below the
threshold value.
• Dark to Bright finds edges that start below the threshold value and cross above the
threshold value.
• Bright or Dark finds any edge.
In the Edge Profile graph displayed when the Absolute threshold is selected, the red line
shows the percentage pixel intensity relative to the green threshold line. The threshold
line will move up or down with the percent value. Edge Profile Graph
161 Minneapolis, MN USA Banner Engineering Corp.
PresencePLUS Software Tools 2/2010