Search found 12 matches

by xskola
Thu Nov 08, 2018 10:32 am
Forum: Boxes
Topic: Using CWT for motor imagery feature generation
Replies: 4
Views: 4458

Re: Using CWT for motor imagery feature generation

Correction: the issue is present on Linux (Debian) as well, just the epoch intervals can be multiple times lower (4-16x, depending on whether acquisition server or generic stream reader is used) to show this issue. My thought was this is happening due to decomposition of 3- to 2-dimensional matrix i...
by xskola
Wed Nov 07, 2018 2:25 pm
Forum: Boxes
Topic: Using CWT for motor imagery feature generation
Replies: 4
Views: 4458

Re: Using CWT for motor imagery feature generation

I actually run into some problems while trying to use this box in practice and I would like to ask you for your opininon on this. I have an MI scenario with feature extraction using CWT + the mentioned python box, nothing really special going on there. I can sucessfully train the classifier (both on...
by xskola
Wed Oct 10, 2018 8:26 am
Forum: Boxes
Topic: Using CWT for motor imagery feature generation
Replies: 4
Views: 4458

Using CWT for motor imagery feature generation

Dear all, recently I've tried to use the continuous wavelet analysis box as a feature generator for motor imagery BCI scenarios. My use case was similar to using FFT for that purposes, I did not really care about the timing of the features (relevant pieces of the EEG signal are selected using the 'S...
by xskola
Fri Apr 27, 2018 11:58 am
Forum: Boxes
Topic: Incremental classifier learning
Replies: 4
Views: 2700

Re: Incremental classifier learning

Well, you were right :) The issue was in the timing of the feature vectors. I didn't care enough and created all the fake timestamps with the same starting and ending time. Although this is enough to feed into the classifier, the multiplexer box did not forward these features to the output. I just c...
by xskola
Tue Apr 24, 2018 1:53 pm
Forum: Boxes
Topic: Incremental classifier learning
Replies: 4
Views: 2700

Re: Incremental classifier learning

Thank you for the reply! Yes, i actually meant between-session incremental learning. I was able to read the necessary feature vectors (modified to be starting at 0.1s each) via CSV file reader, and the only problem I am facing now is how to insert data from multiple sources (CSV reader and the new f...
by xskola
Mon Apr 23, 2018 3:29 pm
Forum: Boxes
Topic: Incremental classifier learning
Replies: 4
Views: 2700

Incremental classifier learning

Hi, I am trying to implement incremental learning for an MI scenario. I set up a simple scenario (following the example in OV stock scenario files) that re-trains my classifier after the stimulation from clock stimulator is sent. This works, however, I noticed that after the training is triggered, t...
by xskola
Wed Apr 04, 2018 1:15 pm
Forum: Help for building the software
Topic: Missing boxes after compiling on Linux
Replies: 6
Views: 10373

Re: Missing boxes after compiling on Linux

Oh my, such a stupid mistake! Thanks a ton, I run the script from extras-Release and everything seems to work like a charm now.
by xskola
Wed Apr 04, 2018 12:55 pm
Forum: Help for building the software
Topic: Missing boxes after compiling on Linux
Replies: 6
Views: 10373

Re: Missing boxes after compiling on Linux

The library location should be clear (empty LD_LIBRARY_PATH), previous builds are not installed on the computer. I tried the clean build, the log is here: https://www.fi.muni.cz/~xskola/build.log . The following is the output from running openvibe-designer.sh: 2345 (process ID) old priority 0, new p...
by xskola
Wed Apr 04, 2018 7:14 am
Forum: Help for building the software
Topic: Missing boxes after compiling on Linux
Replies: 6
Views: 10373

Re: Missing boxes after compiling on Linux

Hi again, I tried looking into the build log, but the missing dependencies seem to be non-essential to the missing boxes: $ grep -i fail rebuild.log -- FAILED to find liblsl (optional) ... -- FAILED to find VRPN -- FAILED to find Emotiv API (optional driver) -- FAILED to find MindMedia NeXus device ...
by xskola
Sat Mar 24, 2018 11:09 am
Forum: Help for building the software
Topic: Missing boxes after compiling on Linux
Replies: 6
Views: 10373

Missing boxes after compiling on Linux

Hi! I have compiled OV on Debian 9.3 and am able to run the application, however, some of the boxes are missing (not available). For example; acquisition client, sinus oscillator, confusion matrix, MI-related boxes, etc. I guess something went wrong (missing dependency) during the compilation. Can y...
by xskola
Wed Mar 14, 2018 10:39 am
Forum: Help for building the software
Topic: 'symbol lookup error' while running Debian build
Replies: 2
Views: 7943

Re: 'symbol lookup error' while running Debian build

Hello Jussi, thank you for your reply! It actually helped me a lot to fix the issue. The problem lies in the co-presence of Matlab on the computer where I attempted to compile and run Openvibe. The script running designed (openvibe-designer.sh) searches for matlab, and adds the required library path...
by xskola
Tue Mar 13, 2018 1:12 pm
Forum: Help for building the software
Topic: 'symbol lookup error' while running Debian build
Replies: 2
Views: 7943

'symbol lookup error' while running Debian build

Hello, I suceeded in building the 2.0.1 (and git) versions in Debian 9.3, but there is an error popping up while starting the designed from the shell script: /home/xskola/dev/meta/dist/designer-Release/bin/openvibe-designer: symbol lookup error: /home/xskola/dev/meta/dist/designer-Release/lib/libope...