Lens calibration

Use this function if you want to use a camera not listed in the drop down menu or if you want to adjust the lens calibration of your Panasonic UE-150 according to your installation.

To do this, you will need to print a calibration pattern on a rigid plate.

!Print a precise pattern at the exact dimension! Select the according pattern in menu Edit/Preferences/Camera calib.

We recommend to use an assymetrical circular pattern (19 rows 27 col)

Assymetrical circular

Add a new device Camera AR FreeD and select User camera in the drop down menu.

!Use the maximum resolution of your camera (if your camera is switchable between HD and 4K, it’s better to switch to 4K for the calibration even if after you use your camera only in HD.

Then go to Lens tab and click on calibrate

Zoom preset:

On your camera set the zoom value at 0 and click on Create to add new zoom preset. You can rename this preset by double clicking on it.

Capture:

Go to Capture tab and select the zoom preset you have created and the Media input corresponding to your camera.
Place the calibration pattern at the right distance to cover around 50% of the total picture.
Adjust the focus and click on Capture button.

!Do the focus and disable the autofocus when you do the calibration for a zoom level (you need to adjust the focus between each pattern series but not during a calibration session).

Make differents captures with many differents positions and orientations of the calibration pattern. Do not do all patterns with the same orientation, you will have a wrong calibration.

*The more captures you make, the best is your calibration.
You can run an auto capture process by clicking on start button. Just set the duration between two captures and the max number of captures.

Calibration:

In the Calibration tab, click on Detect pattern button. The system will detect automatically the pattern for all the captures you made.

*You can delete the capture for which the pattern is not or incorrectly detected. Then click Detect pattern again.

Then click on Calibrate. The system calculate the field of view and the lens distortion parameters for the zoom preset value.

*Repeat the zoom preset, capture and calibration steps for different zoom values

Calibration zoom:

Once you have made captures and calibrations for different zoom values, you can click on Global Calibrate. The system calculate the curves of the field of view and the distortion parameters according to your zoom presets.

*You can select or unselect some zoom presets before running the multizoom calibration process.

You can save your lens calibration into a file by clicking on Export button.