Camera Calibration

SP has several methods of Camera Calibration Tools depending on the need.

Calibration Tools

These tools can generate Lens Profiles and/or Alignment Profiles as well as position screens.

Name	Notes	Generate Lens Profile	Generate Alignment Profile	Screen Alignment
Lens & Tracking Calibration	Combined calibration for camera intrinsic values and tracking calibration Screens needs to be at a fix location, the camera needs to change the location as well as rotation in the maximum possible range			Multiple screens as well as curved walls can be positioned
Lens Calibration	Calibration of all camera intrinsic values without a tracking system Use a board or single screen/monitor for calibration Camera and screen do NOT need to have a fix location			Only if screens do NOT move during the calibration process *
Tracking Alignment	Calibration of the camera tracking system Capture a few images and calibrate the camera to the given screens	A calibrated lens should be used **		Screens should already be aligned or positioned correctly ***
Alignment with Marker	Calibration of the camera tracking system Instead of a screen, known points can be used for this calibration	A calibrated lens should be used **		Alignment is based on markers/known points; no screen is needed
Simple Static Calibration	Combined calibration for camera intrinsic values and location alignment	But set all intrinsic values directly into the camera object instead of generating a profile	But set all coordinate values directly into the camera object instead of generating a profile	Multiple screens as well as curved walls can be positioned
Simple Static Calibration with Marker	Combined calibration for camera intrinsic values and location alignment	But set all intrinsic values directly into the camera object instead of generating a profile	But set all coordinate values directly into the camera object instead of generating a profile	Alignment is based on markers/known points; no screen is needed

*   The tool “Lens Calibration” can position defined screens included curved led walls etc. to the correct location. But ONLY if they do NOT move during the calibration process.
     Alternatively a single screen/monitor or board can be used for this calibration method and dosn´t needs to be static.
     In this case the screen position will not work.
**  A calibrated lens means a calibrated Lens Profile within SP or an incoming camera tracking protocol which includes all intrinsic values.
*** A tracking alignment based on a screen or multiple screens/curved walls needs to have the screens already well aligned

Tools

Reposition tools can modify an existing alignment profile, reposition a camera or position screens.

Name	Notes	Need Calibrates Lens	Need Calibrated Tracking System	Need Screen
Screen Alignment	Align Screens from the given camera Needs at least a camera with Pan/Tilt encoder a full 6DoF tracking system will generate better calibration results with less images
Reposition from Screen	Can position a camera based on a screen Offsets a parent object or the camera location itself Can be used for tracking systems as well as non-tracked static cameras
Focusing on points	Can position a camera based on focusing to known points This tool modifying an existing alignment profile Just focus the camera to known points an capture the images		Need an alignment profile!	Alignment is based on markers/known points; no screen is needed

!All “Reposition tools” requires a calibrated Lens Profile or an incoming camera tracking protocol which includes all intrinsic values.

Axis tools

This tool is within the Axis object.

!All “Axis tools” requires a camera as parent with a calibrated Lens Profile.

!If the Camera as parent of an axis can rotate and or move, an Alignment Profile is needed.