OpenViBE forum

Yes, the link seems to work fine, as others have successfully done it. My problem here is that i may not be implementing it in the right way or rushing into things... Can you send me a full working example, so that i can see what i've missed out or done wrong.

Thanks.

Hi I've my scenario that processes a signal to say whether it's yes,neutral or no. I've 3 classifiers doing the work and a voting classifier to send a stimulation confirming any of the states given earlier. I want to conclude the result based on the total number of hits as given by the voting classi...

Sorry, but i may seem a bit obtuse when i say this, its still not clear as to how the voting classifier actually works..! I've a scenario attached, plz feel free to make any changes to it, which clarifies how it works. It has three different classifier that identifies like, dislike and neutral state...

Thanks a lot, Dieter. :D It was similar to what i had been doing but it had few important things that i had missed out. I'm unable to figure out how the voting classifier actually works...!! I went through few examples and also the documentation. It generates a stimulation if certain number of repet...

Hi Dieter, Thanks for the link. I've been going through many papers to get clues on signal processing, but no luck.. Meanwhile i would create 3 classifiers, like you've said and train them with some data. I also have to see how to actually use a voting classifier, which i'm unaware of. :) I wanted t...

Thanks for an instant feedback. I agree to what you say and that's what i've thought. I'd having 10 set signals to train from, at the max, for each group which is not that bad. :) But i'd also like to know or get some hints for the feature extraction steps, which i've no clue on how to do it, as i'm...

Thanks for all. I'm totally unaware of BCI processing :oops: Consider me a Noob. i really need some help. :( I know the feature extraction is not reasonable at all coz i'm using the one in the example scenarios. Firstly, PS: I still think your scenario's could be simplified by recording multiple con...

Thanks for that :) 1. A similar approach to what you have said but keeping similar data to their respective groups would be somewhat like this : upload.JPG Not sure what's gonna be an effective approach. :? Was your idea of multiplexing "like/dislike" and others to form a set of signals to say "like...

yeah it'd great if i could. But i've no clue how to go about it. any hints or example to start off with. In the mean time i would try & use voting classifiers. Another thing i'm trying to figure out is multiplexing data for liked, disliked & neutral, where each of them would have several signals to ...

Hi,
Continuing my work now i see the need for atleast 3 classes, namely like,dislike & neutral. I did see the option to add classes to the classifier trainer, but i don't know how would the classifier processor deal with it. It has got only two options available. Any suggestions ??

Regards.

Guys, Thanks for the instant reply. I'll make sure to use the same box algorithm to w/r the signal, but not sure what would be relevant in my case. Any suggestions ? :) And about adding the stimulation to the data, how do i do it ? I've seen the motor imagery example and its associated *.lua file wh...

What i thought would be suitable for my case is, acquiring recordings for like/dislike categories of songs and try training a classifier for the two sets. There are couple of problems that i'm having now: 1. the classifier is not being trained even with a single recorded data. How i do that is play ...

Hi, There's another thing i'd like to know, that is the about stimulation file. All example scenarios use the *.lua file and in my scenario where i don't have one so that may be the problem for my classifier to not work. My scenario here is listening to a music and acquiring eeg signals which is wri...

Hi i wanted to know whether or not to use spatial filters for classifying emotions or just like/dislike ? i've seen lots of motor imagery scenarios implementing spatial filters over the motor cortex but not sure if or how to use in my case...

Thanks in advance.

Hi Laurent, I've updated the trunk and rebuilt the entire program. here is the new log file: openvibe-acquisition-server.log I could see improvement in the updated version and wanted to know if you could figure out any thing from this log file. :) here's a snapshot No visualization.JPG as you can se...