Search found 35 matches

by ikara
12 Jan 2012, 09:15
Forum: Known Issues
Topic: P300 Classifier crashes
Replies: 5
Views: 2807

Re: P300 Classifier crashes

Generating feature weights works fine in my system as well.
The problem appears when I use the P300Classifier (trained with the files in "Classification.rar")
to test the "Matrix Task.rar" files. It is then that the Classifier crashes, and I'm using the
latest SVN version.
by ikara
11 Jan 2012, 15:01
Forum: Configuration
Topic: Acquiring GSR signal in BCI2000
Replies: 17
Views: 7958

Re: Acquiring GSR signal in BCI2000

Thank you very much! :)
by ikara
10 Jan 2012, 12:51
Forum: Configuration
Topic: Acquiring GSR signal in BCI2000
Replies: 17
Views: 7958

Re: Acquiring GSR signal in BCI2000

Hi mellinger and thank you for the reply, I took a look at the IIRFilterBase code and also the wiki for more information, and the Process() you are referring to, has no loop over channels, unless you were talking about a different .cpp file IIRFilterBase::Process( const GenericSignal& Input, Generic...
by ikara
10 Jan 2012, 11:29
Forum: Known Issues
Topic: P300 Classifier crashes
Replies: 5
Views: 2807

Re: P300 Classifier crashes

No message from the Classifier. As soon as the "Overall Progress" bar starts filling, the P300Classifier freezes and I get a generic WindowsXP message that P300Classifier.exe has encountered a problem and it's going to close. Visual Studio Just-in-time Debugger says that "An unhandled win32 exceptio...
by ikara
10 Jan 2012, 06:33
Forum: Software Development
Topic: C# Programming
Replies: 4
Views: 2401

Re: C# Programming

Well, you could do some research regarding which brain potential you're going to use. P300, mu rhythm, SSVEP etc... In respect to your choice of potential, i'm pretty sure you can "map" certain gameplay functions. For example you can use SSVEP to control a "Space invades" game, since you have little...
by ikara
09 Jan 2012, 06:46
Forum: Known Issues
Topic: P300 Classifier crashes
Replies: 5
Views: 2807

P300 Classifier crashes

I'm encountering this problem whenever I try to load some test files in the classifier. I'm using 9 channels (8 for EEG and 1 for GSR) both for the training and the test files (TransmitChlist set to channels 1-8 that contain the EEG Signal) During the classifier training, the signal is filtered 0.1-...
by ikara
23 Dec 2011, 09:42
Forum: Configuration
Topic: Acquiring GSR signal in BCI2000
Replies: 17
Views: 7958

Re: Acquiring GSR signal in BCI2000

Thanks mellinger for the reply, I was actually looking at the SourceFilter code, in my attempt to understand how it works, but I couldn't find any explicit information regarding specific channels. I looked on SourceFilter.cpp IIRFilterBase.cpp and FilterDesign.cpp The idea is to obtain RAW signal fr...
by ikara
22 Dec 2011, 06:59
Forum: Configuration
Topic: Acquiring GSR signal in BCI2000
Replies: 17
Views: 7958

Re: Acquiring GSR signal in BCI2000

Anyone? :?: :roll:
by ikara
07 Dec 2011, 12:07
Forum: Configuration
Topic: Acquiring GSR signal in BCI2000
Replies: 17
Views: 7958

Re: Acquiring GSR signal in BCI2000

Another question I'd like to ask is how can I apply different filters to different channels of the gUSBamp amplifier. Since EEG signal needs a BP filter between 0.1-60Hz and GSR a LP filter with cutoff frequency at 1Hz, I was wondering if it is possible to apply a different filter for my EEG Signal ...
by ikara
02 Dec 2011, 09:48
Forum: Known Issues
Topic: BCILauncher questions
Replies: 1
Views: 1966

BCILauncher questions

Hey, I'm having some issues on properly using BCI2000Launcher. I use it to load some .prm training files, for my p300 experiment, but i can't seem to be able to run them all. I press Launch and the operator module loads with my last .prm file and after the session is finished i don't know how to pro...
by ikara
02 Dec 2011, 09:25
Forum: Known Issues
Topic: P300 Intensification won't work on Icons
Replies: 1
Views: 1863

P300 Intensification won't work on Icons

Hey, I just wanted to point out that in the latest version of BCI2000 (October 2011)
if icons are used in the p300 speller, then they won't intensify.
Letters/charactes on the other hand seem to work fine.
by ikara
29 Nov 2011, 10:24
Forum: Configuration
Topic: Acquiring GSR signal in BCI2000
Replies: 17
Views: 7958

Re: Acquiring GSR signal in BCI2000

I'm returning to this topic because I have some questions regarding the CommonReference and CommonGround values in the source tab. I'm using g.USBamp to acquire EEG signal (8 active electrodes + GND + REF) through GAMMAbox (GAMMAbox outputs are connected only to the first two blocks of the g.USBamp)...
by ikara
21 Nov 2011, 05:43
Forum: Configuration
Topic: Acquiring GSR signal in BCI2000
Replies: 17
Views: 7958

Re: Acquiring GSR signal in BCI2000

So if I'm not mistakes when I use float32 instead of int16 I can fill in the SourceChGain with "1" and no conversion will take place according to this formula: http://www.bci2000.org/wiki/images/math/e/2/2/e2211c94e40182a0e24012b7861eb562.png stored samples are gonna be identical to the acquired one...
by ikara
17 Nov 2011, 11:54
Forum: Configuration
Topic: Acquiring GSR signal in BCI2000
Replies: 17
Views: 7958

Re: Acquiring GSR signal in BCI2000

I'm using g.USBamp and g.GSRsensor in a speller experiment. Both signals from the (8) active EEG electrodes AND the g.GSRsensor go through the g.USBamp amplifier. System: WIN XP SP3, BCI2000 3.0.2 I'm having a hard time with the Source settings I believe I've set up everything correctly (I'm posting...
by ikara
16 Nov 2011, 13:18
Forum: Known Issues
Topic: Application takes to long to confirm new parameters
Replies: 1
Views: 1950

Application takes to long to confirm new parameters

I've been recently experiencing problems with BCI2000 ver 3.0.3 I'm using g.tec g.USBamp equipment, on a Windows XP SP3 PC, with the latest drivers for Nvidia FX 5500. for a P300 speller application experiment The issue is that when I hit the "Set Config" button it take a lot of time since the "Star...