» VL.OpenCV Camera Calibration Helper
This site relies heavily on Javascript. You should enable it if you want the full experience. Learn more.

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 | 97 downloads
Show 1 older revisions

Older Revisions

28.10.20 [23:36 UTC] by ravazquez | 64 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


~22h ago

antokhio: @luper vc redist 2013

~4d ago

guest: @Luper, you'll probably need to make the PhongDirectional etc node have one of the pins → NoTexture, and then voilà!

~5d ago

Luper: hey guy, just reinstalled VVVV and text(DX11.Geometry) not working, any idea why?

~5d ago

joreg: Reminder: Show us what you're patching on: #vvvv meetup tomorrow, Tue, Feb 23, 8pm CET: 8.-worldwide-meetup

~9d ago

vux: Hey all, we now in Berlin with @idwyr, say if you want to catch up :)

~13d ago

joreg: @mediadog got it thanks!