How to make a calibration for stereopscopic setups using WingsVIOSO

Emanuel Züger
2017-07-04 11:29

This workflow describes how to calibrate a stereoscopic setup, where multiple projectors per eye are used:

The workflow is a bit different to "normal" multiclient calibrations: the „trick“ is to use the same warping file (VC) both on the master and the slave. That will make left and right eye matched pixel precise.

Preliminary considerations:

  • This workflow assumes that you are using NVIDIA Quadro GPUs with full Mosaic support.
  • It is mandatory that the camera is absolutely still, and not moved in any way until both calibrations are done.
  • It is also mandatory to make the identical camera settings in both calibrations. 
  • Do not use the Wings-integrated calibration procedure. Instead, on each PC call VIOSO Calibrator stand alone (Wings Menu - Programs - VIOSO Calibrator)

Workflow:

  1. Call the NVIDIA Control Panel and create an identical screen setup on Wings Master and Wings Slave:
    1. Master: One Mosaic Group from Projector 1 + Projector 2
    2. Slave: One Mosaic Group Projector 3 + Projector 4

  2.   Make a calibration for PJ1 and PJ2 on the master
    1. Use the local calibrator, not the calibrator workflow from within Wings VIOSO.
    2. Note the settings you did for the camera.
    3. Make everything right (blending, warping, mapping).
    4. Then export it and save both the *.sps and *.vwf file to C:\ProgramData\AV Stumpfl\Wings 5\VIOSO.
    5. Then save the virtual canvas: right click on the warping dialog and select „save VC“ => you get a *.vvc file. 

  3.  Make a calibration for PJ3 and PJ4 on the slave
    1. Use the local calibrator, not the calibrator workflow from within Wings VIOSO.
    2. Use the same camera settings as for the master.
    3. Just take care for proper blending, no need to optimize warping and mapping.
    4. Copy the *.vvc file from the master and load it by right clicking on the warping dialog and select „load VC“.
    5. Then export it and save both the *.sps and *.vwf file to C:\ProgramData\AV Stumpfl\Wings 5\VIOSO.
  4. In Wings VIOSO, create two screens (screen „left eye“, screen „right eye“).
    1. Configure the muldidisplay areas so that they use Monitor 2 (the mosaic group).
    2. Do not forget to enable „VIOSO Calibration“ in the screen and mulditsplay area.

  5. Load the calibration:
    1. If the network configuration is correct, the Wings Slave will load the calibration also and both "eyes" are matched exactly while being combined with softedge blending 
    2. For persistent use, save the calibration on both PCs with the name "_Startup.vwf"

Tags: 3D Stereoscopic standalone calibration
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