P300 speller limitation

[okbalefthanded]

Hi,
I'm working on P300 based BCI using BCI2000, my application has 9 targets as symbols (I use image for each one), what I noticed is that for a 3x3 matrix the possibility to use icon files isn't possible, I'm asking such a limitation is imposed and how can I surpass it?

Thanks in advance for any help or suggestion.

Regards,
Okba

[pbrunner]

Okba,

I have just verified that it works with a 3x3 matrix in the SVN trunk version [1]. Can you please download and compile BCI2000 svn trunk with Visual Studio 2012 and try to reproduce your problem? Please also be aware that for the images, the background color of the P300 speller window has to match the top left corner pixel color of your images.

Regards, Peter

[1] http://www.bci2000.org/svn/trunk

[okbalefthanded]

I've succeeded in building the current svn trunk BCI2000 with Visual studio 2012, for a better explanation I attach pictures of the different windows:

1)TargetDefinitions: here, the regular 6x6 targets for a speller, as we can see the Icon file column to input target images works well.

2)Target Definition 3x3: here I want to work with a 3x3 speller matrix, after changing the column and row number the colmun of Icon file disappear: