OpenViBE forum

I think I understand the error now, but I still have a concern. I would like to assign new channel designations to my input signal. How can I do this? I mentioned earlier that I tried to reassign the channel designations using the OV Acquisition client, but that did not seem to work.

Hello, Thibaut. Thank you for replying. No, they are not the same. The incoming signal retains its Emotiv Epoc default channel labels. Can I override this? I attempted to rename the channels in OV Acquisition Server (by renaming each channel under the "Driver Properties" settings), but it did not af...

Hello! Could anyone explain the electrode location format? I am attempting to generate 2D topographic maps. I am using a headset that consists of an Emotiv Epoc decoder and a cap/electrode system from another company. As such, my electrode locations are different from the default Emotiv Epoc electro...

The lines I'm using in matlab_Initialize.m: u = udp('localhost',5678) fopen(u) The line I'm using in matlab_Process.m: fwrite(u,score) These lines function perfectly fine while in MATLAB, however they do not function correctly when being accessed by OV. I believe that the object 'u' (the UDP client)...

A MATLAB buffer error. I've attached a screenshot of it. I'm able to open a TCP client session on MATLAB, but for some reason fwrite() and write() are returning errors. Are you referencing the tutorials available online under the topic of MATLAB? This is how you establish the box output, correct? [b...

That is the conclusion I've come to, that learning to code in C++ may be a bit too much for me at this point. I am now focusing on developing in MATLAB using the "Matlab Scripting" box. I've successfully extracted the "matrix_data" variable from "Probability values" of the Classifier box. "matrix_da...

I am going to go ahead and assume I need to develop in OV v1.2.2 I am familiar with those tutorials and I am trying to follow along, however I am quite inexperienced when it comes to developing applications in C++. I've obtained MS Visual Studios 2013 Express and I am using that as my editing/compil...

Thank you for your reply.

I am using an Emotiv headset with legacy drivers (SDK v2.0.0.20) and, to my understanding, this limits me to using OV v1.2.2

Is my understanding correct? Does this limit me to developing in OV v1.2.2?

Hello, all. I am using OV v1.2.2 and trying to feed classifier output data to LabView via the TCP write function in OV. As of now, raw data fed into LabView from OV results in strange string entries. I would like to be able to write a box similar to the matrix display one (in that the matrix display...

Thank your for your continued help, Jussi. From the signal displays put in place, it seems like the data is being properly read and fed into the line of signal processing boxes. So, are you saying I could scale my signal down by some scalar factor (say 1/2 for example) before feeding it into the "x*...

Hello. I am making an attempt at detecting foot motor imagery via beta rebound detection using the tie fighter demo/spaceship and neurofeedback scenarios. When I run the calibration scenario, I get a large value for the mean and variance (~150). This value should be much lower according to the work ...

Thank you for your response and input, Jussi. I'm aware of the lower data transfer issues with noninvasive EEG, but I'd like to see how far I can push it. Does the EMG/EEG combination sound more feasible than a combination of right/left hand and foot motor imagery? The idea I have in mind is to use ...

Perhaps my first post was addressing too many topics! Let me try to reduce my question to a few topics for discussion. I am designing a BCI controller for a semi-autonomous wheelchair. The current EEG cap I have uses 14 working electrodes and 2 reference. My goal is to be able to issue four commands...

Hello, all. This post is concerned with a BCI wheelchair control project. I would like to design a BCI controller for a semi-autonomous wheelchair using an Emotiv headset and OpenViBE to obtain and process signals. The features extracted and classified are sent to LabView (as the semi-autonomous fun...

Hello, all. As the title suggests, this post is concerned with implementing a BCI controller for a semi-autonomous wheelchair using an EasyCap/Emotiv headset and OpenViBE to obtain and process signals. The features extracted and classified are sent to LabView (as the semi-autonomous functions and jo...