Search found 212 matches
- Mon Apr 22, 2024 3:18 pm
- Forum: OpenViBE News
- Topic: Highlight your work!
- Replies: 0
- Views: 741
Highlight your work!
Dear OpenViBE community, We are in the process of creating a new showcase video of OpenViBE and would like to display the diverse research activities within our community. This video will eventually be displayed online and also used as background material in conferences and workshops. We therefore i...
- Mon Mar 18, 2024 1:38 pm
- Forum: Scenarios and BCI design
- Topic: motor imaginary CSP online 4. xml crashes
- Replies: 2
- Views: 2016
Re: motor imaginary CSP online 4. xml crashes
Hi,
In addition to Kyungho's answer, I had a look at the code, and the log actually means that you do not have any outputs on the box.
Have you changed any box configuration ?
I agree with Kyungho on the fact that upgrading to a newer version of OpenViBE would likely help.
Thomas
In addition to Kyungho's answer, I had a look at the code, and the log actually means that you do not have any outputs on the box.
Have you changed any box configuration ?
I agree with Kyungho on the fact that upgrading to a newer version of OpenViBE would likely help.
Thomas
- Wed Jan 31, 2024 9:59 am
- Forum: Discussion about BCI and related topics
- Topic: 3 Channel MI BCI
- Replies: 5
- Views: 2197
Re: 3 Channel MI BCI
Hi,
You can try to run some motor imagery with only 3 channels, following the motor imagery exemples provided in OpenViBE.
Although it is possible, the low number of channels may lead to poor classification results.
Kind regards,
Thomas
You can try to run some motor imagery with only 3 channels, following the motor imagery exemples provided in OpenViBE.
Although it is possible, the low number of channels may lead to poor classification results.
Kind regards,
Thomas
- Fri Jan 26, 2024 1:58 pm
- Forum: OpenViBE News
- Topic: OpenviBE 3.6.0 released
- Replies: 0
- Views: 3643
OpenviBE 3.6.0 released
We are pleased to announce the release of OpenViBE-3.6.0 ( download ). This release comes with big a infrastructural update with the use of miniconda for the management of dependencies. This means that OpenViBE has now a more modern and harmonised dependency management across platforms. This notably...
- Thu Jan 25, 2024 9:24 am
- Forum: Scenarios and BCI design
- Topic: Troubleshooting Brain Waves Monitoring
- Replies: 4
- Views: 786
Re: Troubleshooting Brain Waves Monitoring
Thanks for the details.
Could you also share your unity code to understand what are the values that you are logging ?
Thank you.
Thomas
Could you also share your unity code to understand what are the values that you are logging ?
Thank you.
Thomas
- Wed Jan 24, 2024 8:47 am
- Forum: Scenarios and BCI design
- Topic: Troubleshooting Brain Waves Monitoring
- Replies: 4
- Views: 786
Re: Troubleshooting Brain Waves Monitoring
Hi amemov, Thanks for your message. Unfortunately I don't know what settings you are using on each boxes of the scenario, but I am wondering, if the frequencies you are logging are not a sampling frequencies (the amount of samples per seconds) that are being received by Unity rather than the signal ...
- Tue Jan 02, 2024 8:31 am
- Forum: Scenarios and BCI design
- Topic: Troubleshooting motor imagery spatial filter (mi-csp-2-train-CSP.xml)
- Replies: 10
- Views: 24510
Re: Troubleshooting motor imagery spatial filter (mi-csp-2-train-CSP.xml)
Hi,
That's strange indeed.
You could send me the files using any file transfer platform and I'll try to dig a bit more.
Thanks,
Thomas
That's strange indeed.
You could send me the files using any file transfer platform and I'll try to dig a bit more.
Thanks,
Thomas
- Wed Dec 20, 2023 10:31 am
- Forum: Boxes
- Topic: GDF replay to XDF
- Replies: 3
- Views: 17236
Re: GDF replay to XDF
Hi Mike, If you were using OV 3.1, there is an issue with the stimulations recorded in GDF file in that version. If you are also recording stimulations, you might want to look at the following for explanation and fix: https://gitlab.inria.fr/openvibe/gdf-file-fixer/-/tree/master And you shouldn't ha...
- Wed Dec 13, 2023 9:38 am
- Forum: Boxes
- Topic: GDF replay to XDF
- Replies: 3
- Views: 17236
Re: GDF replay to XDF
Hi Mike, There are some scale and offsets applied to data when storing to GDF. This could be the reason you are seeing differences. What version of OpenViBE are you using ? Note that from OpenViBE 3.3.1, when recording GDF with OpenViBE (GDF File Writer) and playing it back with OpenViBE (GDF File R...
- Wed Dec 13, 2023 9:34 am
- Forum: Scenarios and BCI design
- Topic: Troubleshooting motor imagery spatial filter (mi-csp-2-train-CSP.xml)
- Replies: 10
- Views: 24510
Re: Troubleshooting motor imagery spatial filter (mi-csp-2-train-CSP.xml)
Hi membrane286, Did you make any progress on this ? The CSP Spatial Filter Trainer box is trying to get eigen vectors and eigen values from covariance matrices from its two signal inputs. The error message indicates that it failed at doing so. This could be for two reasons: - The matrix inversion on...
- Fri Nov 24, 2023 3:15 pm
- Forum: Designer
- Topic: Saving Timestamps from Stimulations
- Replies: 1
- Views: 15081
Re: Saving Timestamps from Stimulations
Hi Faali002,
I've replied to the question on your post here.
Please let me know if my answer suits your needs.
Cheers,
Thomas
I've replied to the question on your post here.
Please let me know if my answer suits your needs.
Cheers,
Thomas
- Fri Nov 24, 2023 3:13 pm
- Forum: Discussion about OpenViBE
- Topic: Timestamps for the Cues of Graz MI BCI Stimulator
- Replies: 3
- Views: 17810
Re: Timestamps for the Cues of Graz MI BCI Stimulator
Hi Faali002, You can save the stimulations in a CSV file with the CSV File Writer box. From OpenViBE 3.2.0 (although I suggest using the latest version of course), you can record stimulations only in a CSV file. For this you need to right click on the CSV File Writer box and select inputs > input 1 ...
- Thu Nov 23, 2023 3:00 pm
- Forum: Scenarios and BCI design
- Topic: Time based epoching Box
- Replies: 4
- Views: 7274
Re: Time based epoching Box
Hi illusion, I looked at the data you sent me and understood what is going on. Basically, there are more features than expected because the TimeBaseEpoching creates more epochs than excpected. However this is not really a bug. This is due to the "epoching offset / sampling rate" ratio. If I take the...
- Thu Nov 09, 2023 10:59 am
- Forum: Scenarios and BCI design
- Topic: Time based epoching Box
- Replies: 4
- Views: 7274
Re: Time based epoching Box
Hi illusion, Thanks for the detailed message. Indeed, numbers are not matching. I just tried with the default data file provided with OpenViBE saving data in CSV files to count samples, and the counts are ok for me. The Time Based Epoching is actually going from 0.5 to 4.5 seconds (starts at 0.5 and...
- Thu Nov 09, 2023 10:06 am
- Forum: Boxes
- Topic: how to run classifier online and with pre=recorded EEG
- Replies: 3
- Views: 8069
Re: how to run classifier online and with pre=recorded EEG
Hi Jeff, Indeed you don't want to use the StimulationBasedEpoching since it would mean that you already know the class, and therefore don't need the classifier... The StimulationBasedEpoching is only needed for training, to filter each class in the corresponding input the classifier trainer. If you ...