Search found 25 matches

by ariandy
Sun Jul 25, 2010 5:48 pm
Forum: Discussion about OpenViBE
Topic: connection between OpenVibe
Replies: 50
Views: 37490

Re: connection between OpenVibe

oops.. sorry, post deleted. changed my mind. :oops:
by ariandy
Wed Jun 09, 2010 1:44 pm
Forum: Discussion about OpenViBE
Topic: connection between OpenVibe
Replies: 50
Views: 37490

Re: connection between OpenVibe

yrenard wrote:Dear ariandy,

this code is surely available as part of the official VRPN package !
Just look at the vrpn/client_src folder in the vrpn_07_15.zip archive :)

Hope this helps,
Yann
Oops, sorry, didn't check through :oops:

Thanks BTW :)
by ariandy
Sat Jun 05, 2010 4:45 am
Forum: Discussion about OpenViBE
Topic: connection between OpenVibe
Replies: 50
Views: 37490

Re: connection between OpenVibe

Dear yannick, here is the sample program. For your information, you can find its sources from the standard VRPN release 07.13 (It should still be present in more recent releases). You should use it in a console this way : vrpn_print_devices peripheral_name@host_name e.g. vrpn_print_devices openvibe...
by ariandy
Sun Feb 07, 2010 10:49 am
Forum: Boxes
Topic: About Classifier Trainer Box
Replies: 13
Views: 11560

Re: About Classifier Trainer Box

Dear ariandy, Well, my feeling is that those performances are almost the same :) Ah, yes you right.. I can't tell, this just reflects that the classifier had better performances classifying feature vectors which it wasn't trained on. Statistically, it should be able to to classify the future featur...
by ariandy
Mon Feb 01, 2010 1:12 pm
Forum: Boxes
Topic: About Classifier Trainer Box
Replies: 13
Views: 11560

Re: About Classifier Trainer Box

Dear ariandy, indeed, you can test different values for the partition number in the K-fold test. But generally, you will end with an almost optimal value between 3 and 10 partitions. I'm not sure from your feedback whether the documentation of the box was clear or not. However, you should probably ...
by ariandy
Sun Jan 24, 2010 11:28 am
Forum: Boxes
Topic: About Classifier Trainer Box
Replies: 13
Views: 11560

Re: About Classifier Trainer Box

Dear Yann, Laurent, I have additional questions regarding this box. Now it's about number of partitions for K-Fold Test. I've test my EEG recording with various numbers of partitions from 3 to 10, and different partition gives different classifier performance. In a simple way, in order to get the be...
by ariandy
Sat Jan 23, 2010 5:54 pm
Forum: Designer
Topic: Displaying epoched signal
Replies: 1
Views: 1679

Displaying epoched signal

Dear OpenViBE developers, I'm sorry if this is a stupid question, is it possible to display epoched signal? If its possible, where exactly I can tap input for Signal Display Box? I'm learning how randomly-looked EEG signal transforms step by step until it can be recognised (feature extracted), from ...
by ariandy
Sat Jan 23, 2010 2:58 pm
Forum: Discussion about OpenViBE
Topic: The accuracy of moving things by thought
Replies: 8
Views: 8987

Re: The accuracy of moving things by thought

Hello. I don't know well (Yann should :D ) but I think it's OK with only C3 and C4. Adding electrodes on neighbour position (C1/C2, FC1/FC2) can help but in most case C3/C4 are sufficient. Currently I only have access to 2 channel EEG hardware, and upgrading is not really an option right now. Any s...
by ariandy
Sat Jan 23, 2010 7:29 am
Forum: Discussion about OpenViBE
Topic: The accuracy of moving things by thought
Replies: 8
Views: 8987

Re: The accuracy of moving things by thought

Dear Yrenard, The accuracy mostly depends on the ability of the subject to generate discriminable brain activity. Trained subject will have better separation while new comers will have difficulties. People in our lab are using motor imagery only for experiments, a few times a year. We usually have t...
by ariandy
Mon Nov 23, 2009 3:10 pm
Forum: Boxes
Topic: About Classifier Trainer Box
Replies: 13
Views: 11560

Re: About Classifier Trainer Box

yes, you can. If so, the training process will rely on the first-half part of the EEG data. When the train trigger is detected by the classifier trainer, the file reading is paused, and the trainer box do its job with the data it received so far. When the training is done, the EEG file reading is r...
by ariandy
Sat Nov 21, 2009 2:07 pm
Forum: Boxes
Topic: About Classifier Trainer Box
Replies: 13
Views: 11560

Re: About Classifier Trainer Box

Dear Laurent, Thank you for your fast response and clear explanation, it helps me understanding the process. I used the GDF file reader box, but I didn't stop my EEG recording session right after my XML stimulations over, so maybe about last half of my GDF file is mostly unused. And I didn't knew th...
by ariandy
Thu Nov 19, 2009 1:25 pm
Forum: Boxes
Topic: About Classifier Trainer Box
Replies: 13
Views: 11560

About Classifier Trainer Box

Hello. I have several question about using the Classifier Trainer Box. In Classifier Trainer Box, the parameter for "Train Trigger" is by default set to "OVTK_StimulationID_EndOfFile". From the documentation, this is stimulation to trigger the training process. So if I want to train for a Motor Imag...
by ariandy
Sat Oct 31, 2009 3:29 pm
Forum: Designer
Topic: Sample scenarios
Replies: 32
Views: 28744

Re: Sample scenarios

Hello, I'm close to accidentally click "Post new topic" until I found this thread :oops: In OV new release (0.4.0 rev 1737), where is sample scenarios located? I looked into dist/share/ but no "openvibe-scenarios" like in previous version. I search for xml files using linux find, also no result. :?:
by ariandy
Sat Oct 31, 2009 3:29 pm
Forum: Discussion about OpenViBE
Topic: Compatible with ModularEEG (P2 format) ???
Replies: 1
Views: 2571

Re: Compatible with ModularEEG (P2 format) ???

It says on the website that the ModularEEG is currently being integrated in OpenVibe. Does anyone knows if this has been accompliahed? Does OpenVibe now works with the ModualrEEG? Also, I'm looking to use EEG signals to control a robot. I'll probably need to program a PIC micrcontroller with the EE...
by ariandy
Sat Oct 31, 2009 2:16 pm
Forum: Help for building the software
Topic: Installation error when running linux-build
Replies: 9
Views: 7118

Re: Installation error when running linux-build

Thanks for your support, but it seems the problem is on my ubuntu setup. Now OpenVibe runs well on fresh ubuntu installation, so instead of tinkering with OV installation problem i rather use my time to study more about biofeedback and BCIs. And this thread is closed. Thank you. And congratulation f...