Hardware manual

Threshold Viewer Impact Reference Guide
Datalogic Automation Inc. 6-4
Center Fixed Threshold Range - Adjustable Threshold
If the tool's threshold type property is set to "Center Fixed Threshold on Region Average," the X-Axis is dis-
played as -100 to 100 and the centered red cursor is not shown. Moving either the Minimum or Maximum
cursor will move the opposite cursor so that the range is always centered on zero.
Bright and Dark Pixels - Autothreshold
If the tool's threshold type property is set to "Autothreshold Contrasting Bright (or Dark) Pixels," the maxi-
mum Threshold (%) is set to 100 and the minimum is set to the minimum value of the tool’s output property
"Threshold Range Used" if it is present in the tool.
If the tool's threshold type property is set to "Autothreshold Contrasting Dark Pixels," the minimum Thresh-
old (%) is set to 0 and the maximum is set to the maximum value of the tool’s output property "Threshold
Range Used" if it is present in the tool.
You cannot adjust the Threshold (%) values or cursors in this mode.
NOTE: If there is no "Threshold Range Used" property in the tool, then the cursors are not shown and the
Threshold (%) Minimum and Maximum values are set to zero.
The Autothreshold Contrasting Bright (or Dark) Pixels setting works well when the histogram has a bimodal
distribution (i.e. it has two distinct data groupings as in the image above). When the histogram is single
mode (i.e. the grey levels are grouped together around one common average), it is better to use the Center
Fixed Threshold on Region Average or calculate a threshold value using the appropriate tool.
Adjustable Threshold
Center Fixed Threshold Range
on Region Average
Autothreshold Bright Pixels