Search found 780 matches

by jtlindgren
Thu Nov 15, 2018 11:13 am
Forum: Boxes
Topic: Using CWT for motor imagery feature generation
Replies: 4
Views: 2414

Re: Using CWT for motor imagery feature generation

Hi, you can try clicking the 'i' button next to the system load to see which box openvibe thinks is causing the lag. Maybe this reveals something. Also, you can read the generic scenario debugging instructions from here, http://openvibe.inria.fr/tutorial-troubleshooting-openvibe-scenarios/ The key s...
by jtlindgren
Fri Oct 26, 2018 7:54 am
Forum: Scenarios and BCI design
Topic: Foot motor imagery detection (neurofeedback/spaceship)
Replies: 3
Views: 2072

Re: Foot motor imagery detection (neurofeedback/spaceship)

I vaguely remember the spaceship has a sensitivity control somewhere, as I updated the doc in September. See the bottom of it how to control the threshold. http://openvibe.inria.fr/tie-fighter-demonstrator/ Or if there's really a crop somewhere in the pipeline, its parameters should be modifiable. Y...
by jtlindgren
Thu Oct 25, 2018 4:25 pm
Forum: Scenarios and BCI design
Topic: Foot motor imagery detection (neurofeedback/spaceship)
Replies: 3
Views: 2072

Re: Foot motor imagery detection (neurofeedback/spaceship)

Hi Travis, these numbers may depend on the data. Is the data and everything else identical? You can use Simple DSP box to scale signal and matrix streams. Likely the thresholding parameters are also modifiable... Somewhere. :)

Cheers,
Jussi
by jtlindgren
Fri Oct 19, 2018 8:49 am
Forum: Boxes
Topic: Using CWT for motor imagery feature generation
Replies: 4
Views: 2414

Re: Using CWT for motor imagery feature generation

Hi Xskola, thanks for the idea and the link! It'd be interesting to know if you got improved results from it in comparison to some baseline features (which?).

Cheers,
Jussi
by jtlindgren
Fri Oct 19, 2018 8:45 am
Forum: Boxes
Topic: Basic question - how temporal filter box works
Replies: 1
Views: 1245

Re: Basic question - how temporal filter box works

Hi, afaik temporal filter has a state that evolves over time. When a new chunk is obtained, the previous state is used, the chunk is filtered and the state is updated. That said, I definitely recommend using the temporal filter before any epoching operations. This way the risk of artifacts due to no...
by jtlindgren
Fri Oct 19, 2018 8:37 am
Forum: Boxes
Topic: Run Command
Replies: 1
Views: 1113

Re: Run Command

Hi, you can't automatically replace a scenario in designer. You can look at the ssvep examples how to use run command to launch background tasks. Thinking on it, even the run command tutorial should do that. Usually how designer is used in non-research situations is to launch different scenarios fro...
by jtlindgren
Thu Oct 04, 2018 8:24 am
Forum: Scenarios and BCI design
Topic: Help with Matlab scripting
Replies: 9
Views: 4499

Re: Help with Matlab scripting

Ok, great. Btw I imagine global variables work just as they usually do in Matlab. And you can of course pass box_in further to some of your own functions.

Cheers,
Jussi
by jtlindgren
Wed Oct 03, 2018 12:18 pm
Forum: Scenarios and BCI design
Topic: Help with Matlab scripting
Replies: 9
Views: 4499

Re: Help with Matlab scripting

Hi, the following work just fine for me. Can you try these and if they work, modify them to produce your error? function box_out = Initialize(box_in) disp('Matlab initialize function has been called.') box_in.user_data.bool = false; box_in.user_data.number = 777; box_in.user_data.string = 'teststrin...
by jtlindgren
Fri Sep 28, 2018 7:36 am
Forum: Boxes
Topic: can not connect the matlab box to matlab engine ?
Replies: 4
Views: 4470

Re: can not connect the matlab box to matlab engine ?

Hello Brodwix1 & Kiyarash, thanks for the tips! It may be that Mathworks is changing the path to the appropriate .exe from version to another, so the path we put into the box per default can be incorrect for anything except the exact version stated there. The reason why Openvibe doesn't like \ is th...
by jtlindgren
Thu Sep 27, 2018 8:02 am
Forum: Scenarios and BCI design
Topic: spaceship freetime.xml
Replies: 4
Views: 2430

Re: spaceship freetime.xml

Hi, unfortunately the spaceship is not well documented! The first thing to confirm is that the spaceship moves when you run the scenario as it is supplied in openvibe. First launch the spaceship application and once it is in the state rendering 'Ready?' (this is easier if you launch it in a window),...
by jtlindgren
Tue Sep 25, 2018 1:54 pm
Forum: OpenViBE News
Topic: Event: The 3rd International OpenViBE workshop (2018)
Replies: 0
Views: 7380

Event: The 3rd International OpenViBE workshop (2018)

Hello OpenViBErs,

if you happen to be around Miyazaki, Japan in early October 2018, come check the 3rd international OpenViBE workshop organized within the IEEE SMC 2018 conference.

More details can be found here: http://openvibe.inria.fr/openvibe-workshop-2018/


Best,
Jussi
by jtlindgren
Mon Sep 24, 2018 8:09 am
Forum: Scenarios and BCI design
Topic: BCI Controller for Semi-Autonomous Wheelchair
Replies: 4
Views: 4756

Re: BCI Controller for Semi-Autonomous Wheelchair

Hi, its definitely possible to do at least a subset of what you want with openvibe. If you want to use EMG and the two signals well synchronized, the best is if you can plug in the EMG sensor to the same amplifier you get the EEG from. I don't have the time to write a treatise how to do all what you...
by jtlindgren
Fri Sep 21, 2018 8:58 am
Forum: Acquisition server and drivers
Topic: TCP Tagging: Unable to connect to AS's TCP Tagging plugin
Replies: 7
Views: 4635

Re: TCP Tagging: Unable to connect to AS's TCP Tagging plugi

I can't reproduce the issue, the scenarios seem to work for me. If you want it fixed, please post exact step-by-step instructions how to reproduce along with list of any modifications you've made to the scenarios.


Best,
Jussi
by jtlindgren
Fri Sep 21, 2018 7:34 am
Forum: Boxes
Topic: Box Processing & Signal Lables
Replies: 4
Views: 2095

Re: Box Processing & Signal Lables

Usually the coefficients come from some algorithm like xDAWN or CSP trainer (boxes in openvibe). You can also specify them by hand. For example, if you have a signal with channels x1 and x2, then setting the spatial filter as a;b will produce one output y = a*x1 + b*x2. Having coefficients a;b;c;d; ...
by jtlindgren
Thu Sep 20, 2018 2:17 pm
Forum: Designer
Topic: Only one display on each window/tab
Replies: 1
Views: 3125

Re: Only one display on each window/tab

Hello Thinh, that seems to be a bug when running OpenViBE on Windows. On Linux, the Window Manager seems still to work. On Windows it works if the configuration has already been saved to the scenario (like in the simple-dsp.xml tutorial). On OV1.3 it still appears to work, even on Windows. We'll see...