Step 3-5: Calibrate camera
[Purpose]
Snap the calibration grid to calibrate the camera.

[Procedure]
PC
In the navigation area, press '4 校正'.
PC
Select '自行輸入焦距' for '相機焦距', and enter the focal distance indicated on the lens being used.
PC
Press the '檢測' button in '第1平面'. Define the window to enclose all circles that are snapped correctly, and press 'OK'.

Additional
'Cropping out' text or other high contrast things on or near the calibration grid will aid in camera calibration. This helps eliminate false positives while finding the grid. This can also be done by covering up anything that is high contrast during calibration.