» Calibrate and Re-Project
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Calibrate and Re-Project

tool
Credits: joreg, robotanton, emarao

about

Semi-automatically calibrate your projector and throw generated content on to your physical object. These are convenience patches providing a simple workflow for using the projector-calibration that is coming with the ImagePack.

It was presented at Mapping Festival, Gray Area Festival and CGEvent in 2016.

Two Patches are explaining the techniques and show how to use the modules:

  • Step01_CalibrateProjector.v4p
  • Step02_ReProjectionSetup.v4p
Projector Calibration
  1. Place your projector anywhere and point it to a physical object (your "screen") you want to project on to.
  2. Measure several physical points on your "screen" and type their positions into the patch.
  3. Match the points in the projection to the measured points with a few simple clicks.
  4. Hit 'Solve' to get the View/Projection matrices needed for the Renderer.
Re-Projection
  1. Create a 3d Content and render it from the spectator's point of view.
  2. Project. For more about this projection mapping technique, see: Projection Mapping Primer.
Requirements
Known issues

ATI cards
There is a known problem with the ImagePack and Radeon graphic cards.
The solution was proposed by tekcor:

  1. Download "nvcuda.dll": http://www.symbioticcube.com/Downloads/nvcuda.dll
  2. Place it in your ImagePack's nodes/plugins/dependencies/opencv/x86/ folder.

At the moment only 32bit version of the pack is working on my ATI machine.

Foldable model by Emarao based on A4 dimensions

download

vvvv_Calibrate-And-Re-Project_v1_0.zip
22.02.17 [21:06 UTC] by robotanton | 1207 downloads
Initial Release

Aurel 11/09/2018 - 14:53

Hi,
from Wisp Festival in Leipzig, wanted to use a photogrammetrie of the room to calibrate 9 Video projectors.
I have two problems,

  • First the patch crash when I hit solve button... (already tryed different versions of 4v but always crash.
  • Is there a simple way to make those patch in Dx11 ? I am not expert in shaders...

Please,

Aurélien

robotanton 11/09/2018 - 22:13

Hey Aurel,

I've just tried clean install of beta37 x86, DX11 pack, Image pack.
When I click Solve, the node turns red.
Then, when I copy the nvcuda.dll into the Image pack folder (see the detailed description above) and restart vvvv, everything works. Unfortunately the link to the .dll from the @teckor site doesn't work anymore.

This is how the problem solves on my machine.

Hope this helps a bit.

Best,
Anton

Aurel 13/09/2018 - 16:35

Thanks Anton,
It was due to the Version of 4V and the Cuda dll.
Do you know if there is a way to do in DX11 what is done in Step02_ReProjectionSetup by ProjectToScreen shader which calculate the projection on the Mesh surface...?

A

zeos 21/02/2019 - 22:06

what about ConstantProjection (DX11.Effect)

anonymous user login

Shoutbox

~5d ago

~8d ago

joreg: The Winter Season of vvvv workshops is now over but all recordings are still available for purchase: https://thenodeinstitute.org/ws23-vvvv-intermediates/

~14d ago

schlonzo: Love the new drag and drop functionality for links in latest previews!

~22d ago

joreg: Workshop on 29 02: Create Sequencers and Precise Clock Based Tools. Signup here: https://thenodeinstitute.org/courses/ws23-vvvv-08-create-sequencers-and-precise-clock-based-tools-in-vvvv-gamma/

~29d ago

joreg: Workshop on 22 02: Unlocking Shader Artistry: A Journey through ‘The Book of Shaders’ with FUSE. Signup here: https://thenodeinstitute.org/courses/ws23-vvvv-12-book-of-shaders/

~1mth ago

joreg: Talk and Workshop on February 15 & 16 in Frankfurt: https://visualprogramming.net/blog/vvvv-at-node-code-frankfurt/

~1mth ago

woei: @Joanie_AntiVJ: think so, looks doable

~1mth ago

xd_nitro: Anyone remember who increased projector brightness by removing some components that product the color?

~1mth ago

Joanie_AntiVJ: This looks super interesting (vectors over network) would anyone here know how to implement this in beta? https://github.com/madmappersoftware/Ponk