Search found 264 matches

by Thibaut
Mon Jul 18, 2022 5:15 pm
Forum: Boxes
Topic: Python Box - Spectrum output
Replies: 1
Views: 5975

Re: Python Box - Spectrum output

Hello,
Indeed, for the moment only the stimulations, signals and matrices are implemented and as you say the streamed matrix do the job. But you're right, we should see to add the spectrum .... It's not planned yet but I add it to the list.
Thibaut
by Thibaut
Mon Jun 20, 2022 4:34 pm
Forum: Designer
Topic: .csv and .bdf file reader
Replies: 3
Views: 7651

Re: .csv and .bdf file reader

Hi, You have the possible Header of csv here : https://gitlab.inria.fr/openvibe/meta/- ... values-csv
Thibaut
by Thibaut
Thu Jun 16, 2022 8:14 am
Forum: Designer
Topic: .csv and .bdf file reader
Replies: 3
Views: 7651

Re: .csv and .bdf file reader

Hi,
the csv must have a specific shape to work. Maybe if you can save in gdf it's a standard format, you can use it after in OV
Thibaut
by Thibaut
Thu Jun 16, 2022 8:10 am
Forum: Discussion about OpenViBE
Topic: LSL4Unity Latency
Replies: 5
Views: 7564

Re: LSL4Unity Latency

Technically no
by Thibaut
Wed Jun 01, 2022 9:44 am
Forum: Discussion about OpenViBE
Topic: Streamed matrix multiplexer output order
Replies: 4
Views: 6674

Re: Streamed matrix multiplexer output order

Hi,
The streamed matrix multiplexer sends your multiple inputs in a single stream. The only limitation is the dimension of your streams which must be identical. If you have several inputs on the same date, they will come out in the order of the inputs on N lines (you can see with a csv).
Thibaut
by Thibaut
Mon May 30, 2022 8:34 am
Forum: Acquisition server and drivers
Topic: Acquisition server with Micromed
Replies: 4
Views: 6894

Re: Acquisition server with Micromed

Hi, I am not a network protocol expert. But in principle your piepline is good. But if you have the acquisition server on the micromed PC, I don't see why you don't have OV? Otherwise install the headset driver on the PC which already has OV. This intermediate step is mainly to test the headset and ...
by Thibaut
Mon May 30, 2022 8:26 am
Forum: Discussion about OpenViBE
Topic: LSL4Unity Latency
Replies: 5
Views: 7564

Re: LSL4Unity Latency

Hi,
When I got bothered with arduino. I did a lot of tests, among other things, sent a burst of information to see what exactly he received and when. and I tested different methods to forcibly flush the buffer.
Thibaut
by Thibaut
Wed May 18, 2022 9:14 am
Forum: Acquisition server and drivers
Topic: Acquisition server with Micromed
Replies: 4
Views: 6894

Re: Acquisition server with Micromed

Hi, For me the first step is to test everything on the same machine. If it works without problem, we can deport certain processes. However, I would recommend the use of LSL which is less restrictive for beginners (no IP addresses or other to manage just the name of a stream and must be on the same n...
by Thibaut
Wed May 18, 2022 9:05 am
Forum: Discussion about OpenViBE
Topic: LSL4Unity Latency
Replies: 5
Views: 7564

Re: LSL4Unity Latency

Hi,
I haven't this latency. So I can't say where is the problem.^^
THe only time I have this latency is when I communicate with other protocol (for example with arduino) and the answer was you must flush buffer but LSL example make that alone.
Thibaut
by Thibaut
Mon May 02, 2022 8:20 am
Forum: Designer
Topic: Temporal filter box - Band Stop filter order (Notch)
Replies: 1
Views: 6390

Re: Temporal filter box - Band Stop filter order (Notch)

HI Valeria, I'm not sure Butterworth Temporal Filter is optimized for HIgh FIlter, I have test with an order of 30 it works for me (crash at 33). But the filter is "stable" (fully operational) after 40s of signal, as it takes the last signals it's good if signal is constant not the case in EEG. In o...
by Thibaut
Fri Apr 22, 2022 9:43 am
Forum: Scenarios and BCI design
Topic: OpenViBE output to Python
Replies: 2
Views: 6172

Re: OpenViBE output to Python

HI,
You have on Web Site Tutorial for Python Box : http://openvibe.inria.fr/tutorial-using ... -openvibe/ you can make tutorial and see how to receive/send datas
Thibaut
by Thibaut
Mon Apr 11, 2022 2:50 pm
Forum: Scenarios and BCI design
Topic: Feature extraction in MI-CSP
Replies: 11
Views: 11524

Re: Feature extraction in MI-CSP

HI,
1) 500 Samples (Depends of your epoch size).
2) It's the base of classification, The dataset change all. Too much, not enough, bad input.....
Thibaut
by Thibaut
Mon Apr 11, 2022 9:50 am
Forum: Discussion about OpenViBE
Topic: mi-csp-3 number of features
Replies: 1
Views: 6083

Re: mi-csp-3 number of features

Hi Sophia, Your chunk compute is false, you must have 1s entierely so it's not (16*4) 64 but (16*3+1) 49. But It's strange because to have 1080 features vectors, it's with 54 chunks by trials (1080/20) You have 100 chunks too many. You can Test to wirte a csv with Features of one side with Stimulati...
by Thibaut
Mon Apr 11, 2022 9:31 am
Forum: Scenarios and BCI design
Topic: Feature extraction in MI-CSP
Replies: 11
Views: 11524

Re: Feature extraction in MI-CSP

Hi, 1)19x19 is bevause you have 19 features (channels) 2) 20 Chunks is because 20 trials with a size of 500 so you have 10000 sample (500*20) 3) You have 2160 features vector (1080 and 1080) with 6 features. (the CSP have reduce the feature number from your signal in fact 19 to 6) 4) Because it's th...
by Thibaut
Mon Apr 04, 2022 8:36 am
Forum: Scenarios and BCI design
Topic: Error in xDAWN Spatial Filter for P300 Speller
Replies: 2
Views: 6152

Re: Error in xDAWN Spatial Filter for P300 Speller

HI,
This bug were corrected in new version Of OpenViBE (coming soon^^) but you can use the other xdawn box (deprecated) while waiting or if you build from source code get the last developpement commit on all branch.
Thibaut