Search found 239 matches

by jlegeny
Thu Nov 30, 2017 4:53 pm
Forum: Scenarios and BCI design
Topic: MI Classification Accuracy changes with OpenVibe Versions
Replies: 4
Views: 3717

Re: MI Classification Accuracy changes with OpenVibe Version

Hello, one thing to try to set this option is to create a file called openvibe-workspace.conf which you put just next to your xml scenario. Then put this line into the file: Plugin_Classification_RandomizeKFoldTestData=true The token will be loaded by any scenario next to it when it is started. In t...
by jlegeny
Thu Sep 26, 2013 2:39 pm
Forum: Scenarios and BCI design
Topic: Apparatus & speller?
Replies: 1
Views: 2224

Re: Apparatus & speller?

Hello yoshi, openvibe speller works reasonably well when you have at least 8 electrodes on the scalp, mostly in the occipital region: Pz, Oz, O1, O2, O7, O8, CPz, Cz, etc. A new, more complete tutorial on P300 is now available here: http://openvibe.inria.fr/using-the-p300-scenarios-inside-openvibe/ ...
by jlegeny
Thu Sep 26, 2013 9:19 am
Forum: Discussion about OpenViBE
Topic: Dividing data set into training and test data sets
Replies: 2
Views: 3332

Re: Dividing data set into training and test data sets

Hello nsprt,

how is your data set structured? How are the trials tagged? Depending on the stream structure you can either use Stimulation Based Epoching or Time Based Epoching to extract the data you need.

Cheers
Jozef
by jlegeny
Mon Sep 23, 2013 9:54 am
Forum: Scenarios and BCI design
Topic: VRPN and Processing developing environment
Replies: 4
Views: 4110

Re: VRPN and Processing developing environment

hello r0b0t1t0, you do not need to download additional files for the included SSVEP scenarios and application. The problem you are running into can be due to several things. By default Windows firewall will cut off any application trying to connect to any network service and display a window on whic...
by jlegeny
Mon Sep 16, 2013 9:43 am
Forum: Acquisition server and drivers
Topic: [ERROR] with Emotiv Research
Replies: 3
Views: 3596

Re: [ERROR] with Emotiv Research

Hello mmccart92,

Indeed it could be a problem with the API itself, OpenViBE is currently compiled only with the 1.0.0.x series of the SDK, it is possible that Emotiv did make some breaking changes in the v2.

We will look into this.

Regards
Jozef
by jlegeny
Mon Jul 29, 2013 11:35 am
Forum: Discussion about BCI and related topics
Topic: EEG hardware to detect variations in brain waves
Replies: 2
Views: 6020

Re: EEG hardware to detect variations in brain waves

Hello, fernan.left we provide a list of EEG devices available for use with OpenViBE here: http://openvibe.inria.fr/supported-hardware/ As for the channels, each channel represents the whole brain activity on one specific area of brain, depending on where you place the electrode. In order to get an i...
by jlegeny
Thu Jul 25, 2013 2:59 pm
Forum: Designer
Topic: xDawn P 300 online not working
Replies: 1
Views: 2510

Re: xDawn P 300 online not working

Hello AlexandrP, the scenarios in the P300 chain have all a decimation box with a factor of 4 with exception of the first acquisition scenario. You can remove these decimation boxes instead of adding an oversampling factor. Please note that the current implementation of the P300 processing has a bug...
by jlegeny
Fri Jul 05, 2013 9:23 am
Forum: Help for building the software
Topic: Linux-build fails & IT++ problem
Replies: 8
Views: 10795

Re: Linux-build fails & IT++ problem

Hello, glad to hear that you have solved your problem. It is weird though that you still had traces of OGRE in the dependency folder as OGRE should be installed as a native dependency. Could you send me the log of your dependency installation so I can look at it? In my tests with debian the listing ...
by jlegeny
Thu Jul 04, 2013 4:19 pm
Forum: Discussion about OpenViBE
Topic: CSV Import
Replies: 4
Views: 4631

Re: CSV Import

Signal display should be able to display data from a CSV file. How is your data formatted in the file? Can you give us an example here?
by jlegeny
Thu Jul 04, 2013 3:59 pm
Forum: Scenarios and BCI design
Topic: Frequency analysis of signal acquired by SSVEP scenario
Replies: 1
Views: 2426

Re: Frequency analysis of signal acquired by SSVEP scenario

Hi lezan, sorry for a delayed reply. Indeed in your case there is no SSVEP response present in the signal. The accuracy of around 50% inside a binary classifier is consistent with chance level, i.e.: your classifier selects a class at random. CSP itself is a spatial filter (linear combination of ava...
by jlegeny
Thu Jul 04, 2013 3:05 pm
Forum: Help for building the software
Topic: Linux-build fails & IT++ problem
Replies: 8
Views: 10795

Re: Linux-build fails & IT++ problem

From your log I can see that your source directory is polluted by files generated by the CMake. This can happen when the cmake is ran manually with wrong parameters. I would recommend creating a new clean source directory and re-do the building. Alternatively you can sweep your /opt/openvibe-0.16.0-...
by jlegeny
Thu Jul 04, 2013 1:42 pm
Forum: Designer
Topic: Designer Crash v0.16.0
Replies: 4
Views: 4032

Re: Designer Crash v0.16.0

Hello Ed, I have just tested the example scenarios with OpenViBE 0.16.0 as a fresh install and I could not reproduce the crash. Have you modified the example scenarios in any way? Can you provide the log from the designer? It is situated inside C:\Users\ YOURLOGIN \AppData\Roaming\openvibe\log Regar...
by jlegeny
Thu Jul 04, 2013 1:10 pm
Forum: Boxes
Topic: Need help VRPN JAVA-howto receive stimulation from Java code
Replies: 2
Views: 3964

Re: Need help VRPN JAVA-howto receive stimulation from Java

Hello,

if you can run a VRPN button server in you Java program, then you can use the VRPN Client box inside openvibe to listen to the button presses and assign stimulations to them.

Regards
Jozef
by jlegeny
Thu Jul 04, 2013 12:56 pm
Forum: Help for building the software
Topic: Linux-build fails & IT++ problem
Replies: 8
Views: 10795

Re: Linux-build fails & IT++ problem

Hello I have just tested the installation of OpenViBE on Debian. I have modified the dependency installer so it uses the Ubuntu part on Debian and it worked. I have updated the dependency installer in the SVN release and I am uploading it here to this post (as a txt file, rename it to .sh before run...
by jlegeny
Mon Jul 01, 2013 4:37 pm
Forum: OpenViBE News
Topic: New release of OpenViBE 0.16.0 available
Replies: 1
Views: 6078

Re: New release of OpenViBE 0.16.0 available

(trimmed changelog up to 19.jun.2013) Upgrading from v0.15.0 ====================== - For thorough instructions, see here . - User scenarios using "external application launcher" must be updated as the usage of the launcher has changed. See below. - User subprojects such as applications and plugins ...