How to display martix based paradigm for non-alphabetic character set

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rahulchaurasiya
Posts: 9
Joined: 06 May 2014, 05:46

How to display martix based paradigm for non-alphabetic character set

Post by rahulchaurasiya » 19 May 2015, 00:56

Hello,
I want to use a 64 character set (in 8X8 matrix format) as display paradigm. The character set consists of Devanagari script alphabet.
Is it possible to do this using BCI2000?
If not what should I do?

pbrunner
Posts: 344
Joined: 17 Sep 2010, 12:43

Re: How to display martix based paradigm for non-alphabetic character set

Post by pbrunner » 19 May 2015, 08:53

Rahulchaurasiya,

In addition to the text characters, it is possible to display icons (bitmaps) in the P3Speller matrix. Please see the description of this functionality on the following BCI2000 wiki page:

http://www.bci2000.org/wiki/index.php/U ... esentation

Regards, Peter

rahulchaurasiya
Posts: 9
Joined: 06 May 2014, 05:46

Re: How to display martix based paradigm for non-alphabetic character set

Post by rahulchaurasiya » 20 May 2015, 01:17

Thanks peter for your quick reply.

rahulchaurasiya
Posts: 9
Joined: 06 May 2014, 05:46

Re: How to display martix based paradigm for non-alphabetic character set

Post by rahulchaurasiya » 22 May 2015, 00:43

Hello there.

I am able to display special characters (from non-English alphabetic language) in the display matrix by entering the icon files for them into the 4th column of the speller target properties (i.e. Icon Files).
But, Now when I am working in the copy-mode, I want the same characters to be displayed as a result (for that I should enter the same character in the enter column (the second column of the speller target properties). Additionally, I want the subset of same character set to be presented in TextToSpell and TextResult column. Is it possible to do this? ( I am not able to figure out the way for that.)

pbrunner
Posts: 344
Joined: 17 Sep 2010, 12:43

Re: How to display martix based paradigm for non-alphabetic character set

Post by pbrunner » 22 May 2015, 17:09

Rahulchaurasiya,

I remember that a group in Japan used the BCI2000 P300 speller with native Japanese characters [1]. This requires that BCI2000 P3Speller Application to use a specific font for display and unicode to store the strings. After looking through the code of the P300Speller Application I think that this Japanese group had to modify the code a bit. If you have moderate programming skill you should be able to replicate these modifications. If so, let me know and I can provide you some guidance on which changes you need to apply throughout the P300Speller source code.

Regards, Peter

[1] https://i.ytimg.com/vi/YhMtgspW5Qs/mqdefault.jpg

rahulchaurasiya
Posts: 9
Joined: 06 May 2014, 05:46

Re: How to display martix based paradigm for non-alphabetic character set

Post by rahulchaurasiya » 24 May 2015, 03:22

Hello Peter,

I actually want to modify the code for my application. Would you please suggest me the file (and if possible the function) which I will have to modify to handle fonts (supporting unicodes and special characters).
Will I have to do some kind of compilation to see the change in BCILauncher?

rahulchaurasiya
Posts: 9
Joined: 06 May 2014, 05:46

Re: How to display martix based paradigm for non-alphabetic character set

Post by rahulchaurasiya » 26 May 2015, 00:35

Hello peter,
just a gentle reminder, in case if you have missed my last post.

pbrunner
Posts: 344
Joined: 17 Sep 2010, 12:43

Re: How to display martix based paradigm for non-alphabetic character set

Post by pbrunner » 01 Jun 2015, 16:50

Rahulchaurasiya,

sorry for the late response. I was busy with a research experiment.

I have been looking into the Unicode issue and we probably need to make some modifications to the BCI2000 core the support this feature. I will give you an update with the next week on the findings.

Regards, Peter

rahulchaurasiya
Posts: 9
Joined: 06 May 2014, 05:46

Re: How to display martix based paradigm for non-alphabetic character set

Post by rahulchaurasiya » 08 Jun 2015, 06:44

Hi peter,
any update on the issue?

pbrunner
Posts: 344
Joined: 17 Sep 2010, 12:43

Re: How to display martix based paradigm for non-alphabetic character set

Post by pbrunner » 25 Jun 2015, 17:30

Rahulchaurasiya,

sorry for the long delay. After looking into the issue, we realized that this will require a few changes to BCI2000. I have a summer student that will try to implement these changes in the next month.

Regards, Peter

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