In-Camera VFX Aruco Calibration Error

Development Cinematics & Media
, ,
1

Hi

I followed this Tutorial: https://docs.unrealengine.com/4.27/en-US/WorkingWithMedia/IntegratingMedia/InCameraVFX/AligningYourLEDWall/

Everything works great until I reach step 3.2. As soon as I click on the viewport an errormessage appears with this text:

We could not find an appropriate Aruco dictionary for the selected Calibrator.
Make sure you have selected a Calibrator containing Calibration Point components
with names per the naming convention described in the info section of this algo

I could not find any solution to this. When i open up my icvfx-config and select the calibration points, i can see a list of Aruco points under them. And they have the correct Aruco dictionary names (DICT_6X6_250-1-TL, …)

I also tried different Aruco Dictionaries (250, 1000). I also rebuild the whole setup from scratch, but it ended at the same error message.

Would be great if someone could help.

2

Hi, i’m exactly in the same situation as you were last November with the Aruco markers . I managed to import an Aruco blueprint , to place it in the viewer but I have the same message you received about the dictionary… since last November have you found the magic solution you could share ?? It would be very very nice because I’m losing my hair day after day.
Thanks !
Stephan

3

Hey having the same issue! is anyone going to address this? loll

4

Hey guys, so you have to delete the ndisplay config from the level and readd it because I have no idea but it works

5

bump

6

Ok after struggling a lot with this i seem to have found the bug and a solution!

In guide Aligning the LED Wall to Camera Tracking using ArUcos in Unreal Engine | Unreal Engine 5.7 Documentation | Epic Developer Community at point 2.7 it describes that you should click “Create Arucos”. If you do this in the details panel in the NDisplay config, It apparently does not populate the Sup Points table in the main Unreal editor window!

The solution is to do the operation in the Main unreal editor window instead:

  1. In the outliner, choose your NDisplay Config in the scene.
  2. In the details panel find your calibration point (named “ArUcoW1” in the guide)
  3. Under Calibration click “Create Arucos” button
  4. continue the official guide

Hope it helps :wink: