Hardware manual

Impact Reference Guide Threshold Viewer
6-9 Datalogic Automation Inc.
When Pseudocolor is on, a movable horizontal green cursor is displayed. Moving the cursor up or down
adjusts either the Threshold % Minimum or Maximum numeric fields and threshold limits in the image dis-
play, depending on whether bright or dark line type is selected. In this mode, no values are update in the
tool’s properties.
Line Profile - Gradient Mode
Gradient Introduction
The term gradient refers to how quickly an image’s grey level intensity changes. For example, the Line Pro-
file below is from the Line ROI in the image at the right. The image is black from the beginning of the line
to the first circle so there is zero gradient at the beginning of the profile. As the intensity changes from black
to white, the gradient increases in a positive direction, reaches a maximum at the edge, then returns to zero
where the image is white. On the other side of the hole, the intensity changes from white to black and the
gradient increases in a negative (black) direction. The red cursor has been moved so that the red hashmark
on the image is directly over the black edge of the hole, which has a maximum gradient of -46.48.
Line ROI beginning
Zero Gradient
Line ROI beginning
Zero Gradient
The other side of the
white hole
The other side of the
white hole (negative)
Maximum
Gradient at
edge