Rockwell Automation 5370-CVIM2 Module - Manual (Page 61)

Chapter 3
Image Acquisition Parameters
3–22
Threshold Adjustments and Offset Selections (Computed Mode Only)
After positioning a gage across the calibration object, perform the threshold
adjustment, whichever is appropriate for the selected gaging mode (binary or
gray scale). For information about these adjustments, refer to Chapter 8
under the Gaging Tools: Binary Threshold Procedures or Gaging Tools:
Gray Scale Edge Detection.
The threshold adjustments should be performed so that they result in cross
(+) symbols appearing on the two reference edges on the calibration object,
as illustrated by the example in Figure 3.14.
Figure 3.14 Example: Threshold Adjustment (Gray Scale Mode)
If additional +’s appear along the gage, as shown in Figure 3.14, pick the
and buttons in the Calibrate panel to select the offsets
that correspond to the proper reference edges. This is shown by the example
in Figure 3.15 (page 3–23). In the example, offset 1.0 is selected for both
“Feature A” and “Feature B.” These offsets correspond to the outside edges
on the calibration object.