OpenViBE forum

Hello openvibe community. I would like to know how I can obtain the graphs of the evoked potentials P300, to perform an analysis of the P300 of some users during an experimentation. My files are train.ov and online.ov Is there any scenario or box in openvibe to graph P300 of the files obtained by th...

About epoch average: Good morning openvibe community, I'm doing a simulation in matlab, through the online speller-3 scenario, however when I use the epoch average box with the Epoch block average setting, When I use the Epoch count option for any number Other than one, the speller matrix does not d...

Hello openvibe community. I have been using the p300 speller scenarios, for manipulating an application in Matlab. In the speller 1 acquisition scenario I have obtained two two-word .ov files. In the speller 2 train scenario, I trained the classifier with those two words, obtaining precisions of 90%...

Hi all, I wonder if the P300 Speller training scenario can handle an input of several .ov files. I suppose that training the classifier with one single file (i.e., one single word) is not enough for reaching high classifier performances. Hence, owing to the fact that using a word with a huge number ...

Hello Openvibe community. I am changing the matrix of letters in P300, by icons through Glade. Unfortunately when I make the change, the icons do not light up, what can I do to make the icons light up like the letters? I have tried with different types of icons, neon, transparent with jpg, png forma...

Thanks for the last answer. Watching the tutorial tuto1_signal_filter_Process and associating it with my matlab processing function as shown: function box_out = robotarm_process(box_in) for i = 1: OV_getNbPendingInputChunk(box_in,2) [box_in, start_time, end_time, row] = OV_popInputBuffer(box_in,1); ...

Hello to the community. I have a problem, I want to get the outputs of the lua accumulator p300 (which are the stimulation of the rows and columns of the P300 array) and use them as inputs in a matlab scripting box for the process function. That is to say that the process function obtains as input t...