» VL.OpenCV Camera Calibration Helper
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VL.OpenCV Camera Calibration Helper

tool openCV calibration camera intrinsics
Credits: ravazquez and Marshmallow Laser Feast for sponsoring the development of this tool.


This tool is meant to aid you in the process of generating a camera calibration file using OpenCV's xml format. The produced file contains Intrinsics information, specifically the camera matrix and the distortion coefficients.

You can later recover this data using the IntrinsicsReader (Calibration) VL.OpenCV node.

You will need to use a calibration pattern, if you don't have one a there is a link in the patch where you can get one.

You must match your calibration pattern's columns and rows based on the INNER OUTMOUST corners in your pattern. The pattern linked in the patch is 9x6.

You must also measure and specify your pattern's square side length in the patch (in meters).

To be used with vvvv gamma 2020.2.2 and above.

Press 'H' while the Renderer is in focus to display additional shortcuts (britghtness, contrast, reset).

The recommendation is to try and cover as much of the edges of your sensor's field of view as possible, and to try and rotate the pattern in all three axes between the different samples.

Getting samples at different distances is also recommended.


18.11.20 [16:35 UTC] by ravazquez | 13 downloads
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Older Revisions

28.10.20 [23:36 UTC] by ravazquez | 46 downloads

ravazquez 18/11/2020 - 16:37

New version up, the old one was somewhat broken.

Fixed a couple of bugs that were associated with Azure Kinect specific scenarios.

Added VideoIn to make things easier.


anonymous user login


~6h ago

jib: Hi guys ! in Gamma, what's the way to do things that Buffer node does in Beta ?

~1d ago

david: Reminder: vvvv meetup is starting in 10 mins. https://www.youtube.com/watch?v=LzqaoN7QCSg

~2d ago

joreg: Reminder: 6th worldwide #vvvv meetup tomorrow, Nov 24: 6.-worldwide-vvvv-meetup with presentations by u7angel and team, texone and baxtan

~5d ago

tonfilm: That's going to be interesting, let's hope Intel is doing something similar: https://www.tomshardware.com/news/amd-allows-SAM-on-nvidia-gpus

~5d ago

neuston: THX @joreg and sorry for late reply as I left vl for a while. I've responded to related (UI performance issues) thread, no worry

~6d ago

~9d ago

schack: I need some help and hints to realise Text-To-Speech within beta 40 x64!!! THX

~13d ago

joreg: need an mqtt broker? try the new shiftr: https://next.shiftr.io

~13d ago

joreg: @neuston sorry to hear that. that doesn't sound right though...can you elaborate a bit on what you're working. best in the forum.