To help diagnose distortion calibration issues in PC-DMIS Vision, you can enable some simple visual aids.
First, in the ProbeCal section of the Settings Editor, set the ProbeQualVisionOpticsCalDistortionEnableVisualization registry entry to TRUE.
This provides access to two features within PC-DMIS Vision.
Feature 1
From the menu, select the Insert | Hardware Definition | Probe menu option. The Probe Utilities dialog box appears. (This dialog box automatically appears whenever you create a new measurement routine.)
From the Probe Utilities dialog box, click the Results button to view the calibration results.
Where a distortion calibration has been performed, PC-DMIS now displays a graphical representation of the distortion calibration results in the live image view. For systems with a zoom lens, it is possible to change the magnification to see the results for that magnification setting.
Example of a graphical representation of the distortion calibration results
Feature 2
For measured features, it is possible to see the corrected measured data on the live image view. To do this, select the feature in the Edit window and press F9. PC-DMIS displays the measured points on the live image view. By default, PC-DMIS shows the measured points in their “distorted” state with no distortion correction applied. This is to match the camera image, which has no distortion correction.
Click the Show Distortion Corrected
Points button 
on the Live Image View toolbar to show the measured
data with the correction applied.
The measured points are corrected but the camera image is not, which may cause the measured data to appear away from the expected feature on the camera image.