Standalone Camera Calibration Grid Pattern, After Calibration NOTE : If you get an error message that there were an insufficient number of cal- ibration dots found, your dot target is probably not sharp enough. It takes only 9 dots to calibrate. Try adjusting the Edge Sensitivity, so the calibration will find more dots. For very small fields-of-view, it may be difficult to calibrate a camera if the dot grid is not high quality. Modifying the Outline Level may allow calibration in such cases, even with less-than-perfect dot grids.
If a dot is found that is less than one-half the average dot size, or greater than one and one-half the average dot size, the dot will be displayed in orange, to indicate that the calibration may be picking up artifacts within a dot, or outside of a dot. If this occurs, you need to adjust the Edge Sensitivity, lighting, or quality of the dot grid you are using. 6. Click Accept to save the calibration. ACEUser's Guide, 3.6.x, 18316-000 Rev A Page 325