OpenViBE forum

Hi, you can try clicking the 'i' button next to the system load to see which box openvibe thinks is causing the lag. Maybe this reveals something. Also, you can read the generic scenario debugging instructions from here, http://openvibe.inria.fr/tutorial-troubleshooting-openvibe-scenarios/ The key s...

I vaguely remember the spaceship has a sensitivity control somewhere, as I updated the doc in September. See the bottom of it how to control the threshold. http://openvibe.inria.fr/tie-fighter-demonstrator/ Or if there's really a crop somewhere in the pipeline, its parameters should be modifiable. Y...

Hi Travis, these numbers may depend on the data. Is the data and everything else identical? You can use Simple DSP box to scale signal and matrix streams. Likely the thresholding parameters are also modifiable... Somewhere.

Cheers,
Jussi

Hi Xskola, thanks for the idea and the link! It'd be interesting to know if you got improved results from it in comparison to some baseline features (which?).

Cheers,
Jussi

Hi, afaik temporal filter has a state that evolves over time. When a new chunk is obtained, the previous state is used, the chunk is filtered and the state is updated. That said, I definitely recommend using the temporal filter before any epoching operations. This way the risk of artifacts due to no...

Hi, you can't automatically replace a scenario in designer. You can look at the ssvep examples how to use run command to launch background tasks. Thinking on it, even the run command tutorial should do that. Usually how designer is used in non-research situations is to launch different scenarios fro...

Ok, great. Btw I imagine global variables work just as they usually do in Matlab. And you can of course pass box_in further to some of your own functions.

Cheers,
Jussi

Hi, the following work just fine for me. Can you try these and if they work, modify them to produce your error? function box_out = Initialize(box_in) disp('Matlab initialize function has been called.') box_in.user_data.bool = false; box_in.user_data.number = 777; box_in.user_data.string = 'teststrin...

Hello Brodwix1 & Kiyarash, thanks for the tips! It may be that Mathworks is changing the path to the appropriate .exe from version to another, so the path we put into the box per default can be incorrect for anything except the exact version stated there. The reason why Openvibe doesn't like \ is th...

Hi, unfortunately the spaceship is not well documented! The first thing to confirm is that the spaceship moves when you run the scenario as it is supplied in openvibe. First launch the spaceship application and once it is in the state rendering 'Ready?' (this is easier if you launch it in a window),...

Hello OpenViBErs,

if you happen to be around Miyazaki, Japan in early October 2018, come check the 3rd international OpenViBE workshop organized within the IEEE SMC 2018 conference.

More details can be found here: http://openvibe.inria.fr/openvibe-workshop-2018/


Best,
Jussi

Hi, its definitely possible to do at least a subset of what you want with openvibe. If you want to use EMG and the two signals well synchronized, the best is if you can plug in the EMG sensor to the same amplifier you get the EEG from. I don't have the time to write a treatise how to do all what you...

I can't reproduce the issue, the scenarios seem to work for me. If you want it fixed, please post exact step-by-step instructions how to reproduce along with list of any modifications you've made to the scenarios.


Best,
Jussi

Usually the coefficients come from some algorithm like xDAWN or CSP trainer (boxes in openvibe). You can also specify them by hand. For example, if you have a signal with channels x1 and x2, then setting the spatial filter as a;b will produce one output y = a*x1 + b*x2. Having coefficients a;b;c;d; ...

Hello Thinh, that seems to be a bug when running OpenViBE on Windows. On Linux, the Window Manager seems still to work. On Windows it works if the configuration has already been saved to the scenario (like in the simple-dsp.xml tutorial). On OV1.3 it still appears to work, even on Windows. We'll see...