OpenViBE forum

I tried using the signal display to see the classification results, but I don't see any signal there. I get the following error: [WARNING] At time 1.297 sec <Box algorithm::Signal display> Error dimmension count isn't 2! I suspect my classifier processor isn't working, could this be possible? Lorena

Thanks Uahmed, I will see the signal now then.

When you did your tests, could you see the blue bar due to the feedback while you were performing the online acquisition? Because I am not getting any feedback.

Thanks!

Lorena

Well, now I see a new problem: when I perform the online classification, I can't make work the feedback. I used a stimulation listener and all it showed was stimulations right in a row followed by left stimulations in a row. I think classifier the processor is not really classifying anything. What c...

Yes Yann, that was the problem, I had to modify the train trigger and it worked perfectly.

Thanks!

Lorena

These are the messages I am getting: [WARNING] Could not override [CSP Spatial Filter] settings because configuration file [../share/openvibe-scenarios/bci/eog-bci/csp-config-1.cfg] could not be opened [ ERROR ] At time 0.063 sec <Box algorithm::CSP Spatial Filter> Bad matrix size - Expected 16 inpu...

Hi, Well, I tried the CSP scenario. When I train the CSP, I don't get any kind of info message in the status bar, which makes me think I am not getting a valid configuration file. Then, when I want to train the classifier I get a message that says configuration file can't be found (or something like...

Thanks Yann, I will try with the CSP saenario then

Thanks Uahmed,

Actually I didn't use the CSP, I replaced it with the Laplacian filter.

Which is the gyroscope channel? Shoul I remove it for the online acquisition AND the classifier trainer scenario as well?

Lorena

Hello all, I am trying to run a scenario that must discriminate between left and right movements. I train the classifier but have no results in the console, but have not error messages or warnings either. Then, when I run the online scenario, I get a warning "Feature vector size 2 and hyperplane par...

Thanks Jozef!

I will try those options and let you know how they worked.

Lorena

Thanks Jozef! From what you tell me, I assume this rejection class label is not reliable to use as a state to turn ON or OFF a VRPN Button. So, this is what I have to do with VRPN and I don't know what label should I use to OFF the Button: When the classifier detects left or right, must send it to t...

Hello all!

I see in the classifier processor configuration box that I can set, besides class 1 and class 2 labels, a reject class label. What does this label refer to? Will it work if I use it to OFF the VRPN buttons?

Thanks!

Lorena

Thank you Yann, that was exactly what I had troubles with. I imagined the meaning of some of the settings, for others I was totally lost. Indeed, the problem I had was that I needed to show alternating stimulus class 1/class 2, but using that box settings made the stimulus last on the screen for mor...

Hi, What I really need to know is what means each one of the fields that can be set in the Graz Motor Imagery BCI Stimulator Box. Also, I think this box's code is thought to show two stimuli in a random way, is that correct? If it is, can that be modified without modifiing the box's code? Thanks! Lo...

Hello, I have 2 requests: - On one hand, I see that the Generic Stream Writer saves the files in a predetermined path with the recording time on its name. Could be possible to add here the subject´s name as well in the file's name? This would make easier identifying to which subject corresponds each...