I am struggulling with OpenVine for 3 weeks. I will use P300 magic for visual event related potantial BCI application. Images and backround can be changed easily for request.
1. a. In acquistion.xml data recorded in signal folder. Here subject ID must be exist in data file name. How can I add ID to filename?
b. Acquistion.xml trial and session number in gui are not same as application.
c. Why all images do not stimuli in aquiation.xml ? Only some of them flashes. In acquistion, I think data from all images must be recorded.
d. I tried to convert .ov file in to .csv or .edf as follows, generic file reader and csv/edf writer but it failed.
2. a. In train-classifier.xml file, defaultly generic stream reader reads signal/bcı-p300-signal.ov. Why only one file is used? For example, how can I data from 18 subjects?
b. How can MATLAB classifer be applied in this part?
Please help me.
I would suggest you to post your questions on the OpenViBE forum and/or read whether others have had similar questions on the forum (http://openvibe.inria.fr/forum/) as well as to read the existing documentation (http://openvibe.inria.fr/documentation-index/), which is rather extensive. I hope this helps,
Fabien
im my opinion by far the most vital defiency of OpenVIBE is un-regular document and un-popular forum.
I agree that it may be frustrating when you don't get an answer to your problem, but you have to realize that this is a free and open-source software, meaning people are not making money out of it. So people who answer on the forum or write the documentation have to have the knowledge, motivation and time to do so, as they are doing it for free, purely out of good will...
Hello Apdullah,
I tried to convert .ov file in to .csv or .edf as follows, generic file reader and csv/edf writer but it failed.
It didn't fail with me.. But you cannot use the default generic stream reader. The output should be of 'signal' type. Try the xml attached and tell me if it works..
All bests..
Hi Dr.Kabbara I have one more question. I have started collecting data with OpenVIBE and Emotiv EPOC.
I have serious problem with OpenVIBE training and online session.
As I have learned P300 train.xml file detects P300 and non-P300 classes. These classes are chosen in Simulation Based Epoches boxes that are connected to classsifier trainer box which generates classifierP300.cfg. So, this generated classifierP300.cfg. file has weigths that helps to classsify only P300 and non-P300 targets. I can get 80% + accuracy while this process. In online session classifieProcessor boxes uses classifierP300.cfg file to detect 6x6 letters in P300speller or 4x3 card in P300 Magic Card senario. Where am I wrong? . Without training 6X6 or 4X3 classes how can we get these system online ? I tried to classify 4X3 classes, not P300 and non-P300 classes, but could not get good results?
Thank for your helps..
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