OpenViBE forum

HI, If I understood correctly. You are looking to subtract the average from a previous signal portion (which potentially is updated with each new stim) and not all the time but just on another specific portion. In any case, if you are looking to keep an average that will be updated sometimes. There ...

HI,
There is no box who make directly a "baseline correction". It depends what you call a "baseline correction".
I'm not sure to understand but to subtract a value from a stream, you have the simple dsp box.
Thibaut

HI, For VHDR I never test this format. But For Epoch size It's simple. Openvbie send values by epoch. So you don't get value one by one but epoch by epoch so on each loop the box send 0.625s of values. For the box it's the Brain Vision box for VHDR you're right. Can you share the file (I can't check...

Hi,
The hack to use OV 2.2.0 is usefull to set up your box. After box is setting up you can go back to 3.1.0. You see the option change when you change classifier (in 2.2.0) the update fail in 3.1.0 it's why it's crash. Burt if settings are update (by previous version of OV) it's good.
Thibaut

Hi,
Yes you must remove the "train" stimulation (often OVTK_StimulationId_Train) on all except the last. Because when the trainer box see this stimulation he train his classifier (or csp) and don't take the signal after the stimulation.
Thibaut

Hi, First of all you must train your classifier (to have one) next the incremental scenario is here But when you see the scenario, the stimulation to "re"-train your classifier is send by acquisition server and when a train is send the classifier is reload. But in fact it's not a train with all prev...

Hi,
If you are trying to find out where is which electrode and you have no idea how to proceed. The tricky method is to create artifacts on each electrode one by one to identify them... it's ugly but if you have no idea how your electrodes are ordered...
Thibaut

Hello, The windows 11 deployment is very fresh for many people and a lot of people have not yet passed on it. On our side, we have not yet been able to test this Windows update. If you have compiled OpenViBE, you have some unit and validation tests to verify compatibility. We are interested in any r...

Ho, I never used OSC protocol. Actually in OpenViBE we favor the LSL protocol. It's good if you have solved your problem.
Thibaut

Hi,
You can have a generic oscillator with driver which send random sinus combinason signals on N channels.
If you wan't a specific sinusoidal signal, you have the box time signal and next simple dsp box wich transform your input with a function (as sin).
Thibaut

HI,
EEG Dataset are really complicated to have and share actually. Sorry we haven't more datas.
Thibaut

Hi, It's not a real bug but yes there is a problem in the code of the classifier processor. The real problem is the check of consistent date for stimulations. For information all stimulation stream must have chunks that start when the previous ones have finished. but the stimuli are not sent every t...

Hi,
This warning is not a problem, stimulations date are a little boring to use and often if you don't pay attention to that you have this kind of warning.
Thibaut

Hi, There is a problem with the current version of OV (fixed for the next one) the parameters are not updated and the crash is due to the fact that the SVM has different parameters from the LDA so the crash occurs. It's annoying but if you set your box on OV 2.2.0. The settings will be good and you ...

Hi, I'm not sure I really understand so I might be on the wrong track. For offline analysis of your signals OpenViBE is not the best tool, people use Matlab and EEGLab and other Python. In both cases it is with gdf or csv files, the ov format being exclusive to OpenViBE (you can convert your files t...