If your calibration is failing, please check the following :
Check the camera settings
All your cameras need to have the same settings. Check-list before calibrating:
- Please do not use the camera zoom feature, or the GoPro4 Superview mode
- Choose the correct lens parameters when calibrating (for GoPro , the horizontal FOV is about 120°). FOV for common rigs can be found here
- If you have circular fisheye lenses or are in photo mode, do not forget to crop the input images
Carefully pick your calibration scene
When setting up a shooting, the first step should be calibration:
- Check that your scene has enough details (if a camera is shooting 100% the sky, it will be hard to calibrate)
- Remove all close objects (cables, ...): try to have no object closer than one meter
Rotate your rig and launch the calibration again
By rotating your camera, you will put new features/details on the overlapping part of the images, which will enable Vahana to detect new control points. The newly created control points will accumulate with the previous ones providing a better chance to get a successful calibration
Import a manual calibration
Please note that VideoStitch softwares are compatible with PtGui and Hugin, so that you can manually create a calibration if you couldn't have a good enough calibration scene. It can then be imported in Vahana VR:
Please note that each individual camera should be positioned at the same index on your rig each time if you don't want to create a new calibration.
Each camera should be plugged to the same HDMI port every time you set up everything again in order to re-use your configuration or manual template with a previously created calibration
You should now be good to go !
If this article didn't help you solve your calibration your issue, please enquire for help in our forum:
- a description of your rig;
- the parameters of your camera;
- a snapshot of all the inputs, captured through the software:
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