OpenVibe P300 Speller Online - No "Green" box displayed

About BCI and box tutorial/demo scenarios bundled with OpenViBE.
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openvibeexplorer
Posts: 6
Joined: Wed Mar 18, 2020 2:48 pm

OpenVibe P300 Speller Online - No "Green" box displayed

Post by openvibeexplorer »

Hello there,

Just to give you a bit of background:
I was successfully able to do an OpenVibe build 3.0.0. Execute the Designer as well as Acquisition Server. I am using "Muse - 2" with "Lab Streaming Layer" driver to capture the EEG data. I am successfully able to run the "p300-speller-2-train-classifier" with 73% k-fold cross-validation accuracy.

Now about the issue:
After doing all the above, when I am trying to run the "p300-speller-3-online" (with 2 trials), it is showing me the "Blue" box for target identification. However, it does not show any "Green" box which should display the predicted outcome of training.

Could you please help me out to identify the reason of not getting the "Green" box.

Note: I am NOT using the xDAWN scenario. This is the "epoch average" scenario of P300 speller.

Regards,
openvibeexplorer

Thibaut
Posts: 189
Joined: Wed Oct 31, 2018 9:14 am

Re: OpenVibe P300 Speller Online - No "Green" box displayed

Post by Thibaut »

Hi,
If you build from source, with the git source, you can go to the development branch, normally the bug of P33 boxes are fixed. Tell me if not.
Thibaut

m.casso-echalar
Posts: 11
Joined: Tue Jun 02, 2020 3:07 pm

Re: OpenVibe P300 Speller Online - No "Green" box displayed

Post by m.casso-echalar »

Hello, I have the same problem as the previous user, but I didn't quite understand the solution.
Did you mean we have to download the scenarios from the git hub?

openvibeexplorer
Posts: 6
Joined: Wed Mar 18, 2020 2:48 pm

Re: OpenVibe P300 Speller Online - No "Green" box displayed

Post by openvibeexplorer »

Hello there,

As you suggested, I pulled out the latest code from the OpenVibe development branch and built it.

The development branch I am using is below:
git clone https://gitlab.inria.fr/openvibe/meta.git

However, it does not seem like this issue is fixed. The predicted (green colored) character is not getting displayed for P300-speller "online" scenario with "epoch average".

Could you please help out in this regard?

Regards,
openvibeexplorer

Thibaut
Posts: 189
Joined: Wed Oct 31, 2018 9:14 am

Re: OpenVibe P300 Speller Online - No "Green" box displayed

Post by Thibaut »

Hi,
you must update each submodule to latest development commit
Thibaut
PS : Remove your build and dist directory to build from scratch

openvibeexplorer
Posts: 6
Joined: Wed Mar 18, 2020 2:48 pm

Re: OpenVibe P300 Speller Online - No "Green" box displayed

Post by openvibeexplorer »

Hi there,

- I fetched the whole git repository just yesterday.
- I used the command "git submodule update --init --recursive" to fetch each submodule recursively.
- I made sure there is no "build" and "dist" directory.
- I also removed the "AppData\Roaming\openvibe-3.0.0\scenarios" and checked that it gets created as a part of full build and install. I am running all scenarios from this "scenarios" directory.
- However, it does not give me the predicted output in the "p300-speller online" scenario with "epoch-average" in GREEN color.

I need your help, to check if you are getting the GREEN box at your end.

Regards,
openvibeexplorer

Thibaut
Posts: 189
Joined: Wed Oct 31, 2018 9:14 am

Re: OpenVibe P300 Speller Online - No "Green" box displayed

Post by Thibaut »

THe init --recursive is not enough go in each submodule and get last commit

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