OpenViBE forum

Dear Elsa88Joseph, Thank you for your interest in OpenViBE and welcome on this board. The System PLUS Evolution software is compatible only on the Windows operating systems and the methods used to interpret the micromed data are contained only on a DLL. Consequently, you can use the driver micromed ...

Dear pickku, In your file, you have 1000 lines and I think you used a sampling rate equal to 512, that's why you have a very short signal. Exactly, your signal is visible for 1,95 second, because you read 512 lines per second. If the link3_blink3 file was recorded with the same sampling rate as the ...

Dear pickku, You can find 2 scenarios and a CSV file examples. This can give you an example of the structure of the CSV file to use. As jLegeny says, The file you have sent (blink3_blink3.csv), need few modification to be used by the CSV reader. In your file, the columns Time and sampling rate was m...

Dear Pickku Thank you for your scenario. Can you check if the separator of your file is the same as the separator defined in your csv box settings. Because in files you sent, the csv file used a separator “,” and the separator defined in your scenario is “;”. When I try with an other csv file, I hav...

Dear R0MA1N I made some modifications for the TMSI device and I sent it on the forge. Now it's possible to use external trigger with this device, but I haven't got the trigger system for it, so I haven't tested it and I don't know if it running well. Could you test it and give me some feedback, than...

Dear eeg, Thank you for your interest in OpenViBE and welcome on this forum Actually, the classifier processor can't classify more than 2 classes. At the moment, I'm working on SVM to add the possibility to modify parameters of the SVM algorithm rather than always use the default parameters. Current...

Dear EdwardYANG, Thank you for your interest in OpenViBE and welcome on this forum. To build a connection with Micromed, System PLUS Evolution is not enough. You need to buy the option SW EEG BCI. This application is installed in your BQUSB Micromed Interface. it is mandatory to receive data by TCP/...

Dear R0MA1N, I'm sorry for this late response. I haven't got trigger's materials but I just found few information about it. Finally, triggers are displayed by Openvibe but not as a stimulation, they are integrated in the signal. If you display all channel in a signal display, you can see a signal re...

Dear davidchung, I tested the P300-speller-xDAWN with a 3x3 matrix, and I hadn't problems. I saw targets and results flashes. Your files, p300-stimulation-targets.xml and p300-speller-stimulator.cfg, are good so, if you haven't got problems about classifier processor and spatial filter, I think the ...

Dear DavidChung, I was able to create GtkImage objects in the 3x3 matrix with the path information in the pixbuf property. However, when I run the acquisition scenario, I see the 3x3 matrix with my images on the screen, but the rows and columns of the matrix do not flash. What further changes do I n...

Dear Davidchung For your modifications on the file p300-speller-stimulation.cfg, I don't see any problems on it, but for the training phase, I think it's better to keep 12 repetitions to have a better classification. You are right for the file p300-speller-visualisation.cfg, you needn't to do modifi...

Dear davidchung, I used your scenarios and I hadn't got problem to run them. In the second scenarios the cards are flashed, but I have made few modifications in the first scenarios for this. This scenario has two running modes and it is composed to three part. The first is a read file, to replay a r...

Dear davidchung Thank you for your logs. I looked them and it seems that no box had a problem, so it's possible the problem come to the data of your file. I think you had tried the step 2 with the default file “bci-p300-magic-card.ov“ and all was right. Could you send me your file “current-[2011.01....

Dear davidchung You're right, the p300-magic-card is similar as the p300-speller-xDAWN, but you haven't the step for learn the spatial filter. The first step is the acquisition with the scenario p300-magic-card-1-acquisition. The target is the picture with a green border. The second step is the trai...

Dear dumoulinj, The “classifier trainer” stimulation input is used to know when all epochs was received. The training start when this input receive the stimulation defined by the "Train trigger" parameter. The “classifier trainer” has 2 or more “Feature vector” inputs, whether one per class. In your...