Using openvibe with Emotiv

[fabien.lotte]

"Online" refers to an actual real-time BCI, which the user can use to send commands to the application and receive feedback in real-time. OpenViBE aims at designing such (online) real-time BCI.
Offline would refer to simple data analysis on your computer, without an actual user sending commands in real-time. BLiFF is basically a library of functions to do EEG analysis and calibrate classification algorithms, but it cannot be used as such to do real-time classification and feedback. As far as I understand, you want to do actual control of a robot with a BCI, which is an online and real-time application. Therefore, OpenViBE seems more suitable to your needs.

[pickku]

Thankyou for your explanation sir.I started using openvibe if some doubt arises I will post further.

[Floriane]

Hello everybody!

Just started working with OpenVibe using Epoc headset as a BCI, and a question came up from this quote:

First let me remind you that you can directly record Emotiv EEG with openvibe
You will find on the forum/website all information to do that.

Sorry much, but I didn't find an instructions to do that directly, w/o importing files, etc. Can you give me the link to the description, please?

Thank you in advance!

[ddvlamin]

Hi,

I think there's some useful information in the following post: viewtopic.php?f=14&t=311&p=1797#p1797

you have to install openvibe from source: http://openvibe.inria.fr/documentation/ ... stall.html

Best regards,
Dieter Devlaminck

[Floriane]

Dieter, thank you. My point is that I've built the openvibe already, and tried it with Epoc, but I didn't see a way how can I get the different bands by frequencies (e.g. that are known as alpha, delta, etc.) Are there any instruments provided or maybe some hints how can I get this information.

[karthiks]

Dieter, thank you. My point is that I've built the openvibe already, and tried it with Epoc, but I didn't see a way how can I get the different bands by frequencies (e.g. that are known as alpha, delta, etc.) Are there any instruments provided or maybe some hints how can I get this information.

Let me try to understand the question correctly - You want to get data in a specific band or you want to decompose the information into different bands? You might want to take a look at the Temporal Filter - GPL.

[Floriane]

The point is to get different bands with their frequencies and the point I'm interested in even more is to recognize which wave is where.

[Floriane]

I want to decompose the information into different bands. And to see the frequencies right there on same pic.

[ddvlamin]

As karthiks said you could do it by constructing several pass-band filters in different bands and computing the variance

or maybe using some of these boxes :

Power Spectrum Display box or Time Frequency Map Display box

using this box to select the frequencies : Frequency Band Selector box and the Spectral Analysis GPL box to compute the spectrum.

Best regards,
Dieter Devlaminck

[Floriane]

thank you. seems to get the idea...)