Setup SSVEP BCI example - Revision history

ViktorKL: /* Adjusting the Stimulation */

2016-11-09T16:21:46Z

‎Adjusting the Stimulation

ViktorKL at 14:40, 5 November 2016

2016-11-05T14:40:13Z

ViktorKL at 15:14, 3 November 2016

2016-11-03T15:14:49Z

ViktorKL at 11:06, 3 November 2016

2016-11-03T11:06:44Z

ViktorKL at 07:15, 29 October 2016

2016-10-29T07:15:56Z

ViktorKL at 15:16, 27 October 2016

2016-10-27T15:16:07Z

ViktorKL at 14:12, 27 October 2016

2016-10-27T14:12:14Z

ViktorKL at 13:04, 27 October 2016

2016-10-27T13:04:59Z

ViktorKL: /* Adjusting the SSVEP-BCI */

2016-10-27T13:01:48Z

‎Adjusting the SSVEP-BCI

ViktorKL: /* Adjusting the SSVEP-BCI */

2016-10-27T13:01:26Z

‎Adjusting the SSVEP-BCI

@@ Line 42: / Line 42: @@
 == Adjusting the Stimulation ==
-For stimulation, a second screen hast to be attached to the control computer. The BCI then will adapt automatically to the adjusted frequencies. The configuration of the stimulation can be set by clicking the stimulation icon: [[File:Stimulus.png|20px|link=]]. Consequently, the window for setting the stimulation opens.
+For stimulation, a second screen hast to be attached to the control computer. Performance issues in the visualization of the stimulation are mostly the consequence of old graphic drivers. Since challenging graphical tasks are performed, the latest graphic driver should be installed on the operating system.
 [[File:StimulationFeature.jpg|center|900px|thumb| Stimulation feature of the SSVEP-BCI plugin.]]
@@ Line 49: / Line 51: @@
 The fourth button initializes the visualization of the screen keyboard device. In the group box "BCI Speller" a short phrase can be set in order to show to the subject in reinitialize the accuracy feature. In this example the chosen phrase is "TU Ilmenau". By clicking the button "start measurement" in the SSVEP-BCI configuration window. A measurement can be started then.
 == Handling of the Screen Keyboard ==

@@ Line 5: / Line 5: @@
 == Editing the Processing Pipeline ==
-In the following figure an edited setup of the SSVEP-BCI processing pipeline is shown in the MNE-Scan GUI environment. For this example the NoiseReduction plugin was interposed as a preprocessing step in order to increase the Signal-to-Noise ratio. However, the SSVEP-BCI plugin can also be processed with "raw" (unfiltered) data by connecting it directly with the  acquisition plugin.
+In the following figure an edited setup of the SSVEP-BCI processing pipeline is shown in the MNE Scan GUI environment. For this example the NoiseReduction plugin was interposed as a preprocessing step in order to increase the Signal-to-Noise ratio. However, the SSVEP-BCI plugin can also be processed with "raw" (unfiltered) data by connecting it directly with the  acquisition plugin.
-[[File:MNE-Scan processing pipelilne.jpeg|frame|center|SSVEP BCI processing pipeline in the MNE-Scan environment]]
+[[File:MNE-Scan processing pipelilne.jpeg|frame|center|SSVEP BCI processing pipeline in the MNE Scan environment]]
 == Adjusting the SSVEP-BCI ==

@@ Line 43: / Line 43: @@
 For stimulation, a second screen hast to be attached to the control computer. The BCI then will adapt automatically to the adjusted frequencies. The configuration of the stimulation can be set by clicking the stimulation icon: [[File:Stimulus.png|20px|link=]]. Consequently, the window for setting the stimulation opens.
 Three tests can be started by clicking the associated buttons. Every test beholds different numbers of flickering panels with a different size. Each panel can be selected with the first combo box. With the second combo box, the frequency of the selected panel can be adjusted. Below of the combo boxes, the refresh rate of the subject's screen is displayed. If the stimulation screen is shown on the wrong monitor, the screens' numbers have to be exchanged in the main settings of the operating system.
-The fourth button initializes the visualization of the screen keyboard device. In the group box "BCI Speller" a short phrase can be set in order to show to the subject in reinitialize the accuracy feature. By clicking the button "start measurement" ind the SSVEP-BCI configuration window. A measurement can be started then.
+The fourth button initializes the visualization of the screen keyboard device. In the group box "BCI Speller" a short phrase can be set in order to show to the subject in reinitialize the accuracy feature. In this example the chosen phrase is "TU Ilmenau". By clicking the button "start measurement" in the SSVEP-BCI configuration window. A measurement can be started then.

← Older revision		Revision as of 11:06, 3 November 2016
Line 42:		Line 42:
	== Adjusting the Stimulation ==		== Adjusting the Stimulation ==

−	The configuration of the stimulation can be set by clicking the stimulation icon: [[File:Stimulus.png\|20px\|link=]]	+	For stimulation, a second screen hast to be attached to the control computer. The BCI then will adapt automatically to the adjusted frequencies. The configuration of the stimulation can be set by clicking the stimulation icon: [[File:Stimulus.png\|20px\|link=]]. Consequently, the window for setting the stimulation opens.
		+
		+	Three tests can be started by clicking the associated buttons. Every test beholds different numbers of flickering panels with a different size. Each panel can be selected with the first combo box. With the second combo box, the frequency of the selected panel can be adjusted. Below of the combo boxes, the refresh rate of the subject's screen is displayed. If the stimulation screen is shown on the wrong monitor, the screens' numbers have to be exchanged in the main settings of the operating system.
		+
		+	The fourth button initializes the visualization of the screen keyboard device. In the group box "BCI Speller" a short phrase can be set in order to show to the subject in reinitialize the accuracy feature. By clicking the button "start measurement" ind the SSVEP-BCI configuration window. A measurement can be started then.

@@ Line 13: / Line 13: @@
 Like already mentioned, in the thesis "[http://opac.lbs-ilmenau.gbv.de/DB=1/SET=2/TTL=1/CMD?ACT=SRCHA&IKT=1016&SRT=YOP&TRM=Development+of+a+BCI+based+on+real-time+neural+source+localization Development of a BCI based on real-time neural source localization]" different scientific approaches are combined in order to realize this BCI. The adjustment of these features can be done by clicking the configuration icon:[[File:Configuration.png|20px|link=]] on the SSVEP-BCI's GUI which is depictured in the previous figure. With this command, the configuration GUI is opened which is shown in the following figure.
-[[File:SSVEPConfigurationWindow.jpg|right|900px|thumb| Configuration Window of the SSVEP-BCI plugin]]
+[[File:SSVEPConfigurationWindow.jpg|center|900px|thumb| Configuration Window of the SSVEP-BCI plugin]]
 The adjustments can be done online during the processing of the plugin with the configuration GUI:

@@ Line 4: / Line 4: @@
 == Editing the Processing Pipeline ==
 In the following figure an edited setup of the SSVEP-BCI processing pipeline is shown in the MNE-Scan GUI environment. For this example the NoiseReduction plugin was interposed as a preprocessing step in order to increase the Signal-to-Noise ratio. However, the SSVEP-BCI plugin can also be processed with "raw" (unfiltered) data by connecting it directly with the  acquisition plugin.
 [[File:MNE-Scan processing pipelilne.jpeg|frame|center|SSVEP BCI processing pipeline in the MNE-Scan environment]]
 == Adjusting the SSVEP-BCI ==
@@ Line 18: / Line 15: @@
 [[File:SSVEPConfigurationWindow.jpg|right|900px|thumb| Configuration Window of the SSVEP-BCI plugin]]
-Following adjustment can be done with the configuration GUI:
+The adjustments can be done online during the processing of the plugin with the configuration GUI:
 ===== Channel Select =====
-The channel select is realized with a .txt-file which is located under "''MNE-CPP Folder''-bin-mne_scan_plugins-resources-ssvepBCI", like the already included "Pinning_Scheme_Duke_Dry_64.txt" file. These files behold the mapping of the channel names according to the channel number in the FIFF-file. You can change the current selected folder or link the plugin to a new edited file.
+The channel select is realized with a .txt-file which is located under "''MNE-CPP Folder''-bin-mne_scan_plugins-resources-ssvepBCI", like the already included "Pinning-Scheme-Duke-Dry-64.txt" file. These files behold the mapping of the channel names according to the channel number in the FIFF-file. You can change the current selected folder or link the plugin to a new edited file.
 In the latter case, the new edited file-name has to be changed in line 241 of the "ssvepbciconfiguration.cpp" file. Also the default channels can be changed in the ssvepbci.cpp file in line 104 and 106.
 Now the channel can be selected or deleted by drag&drop between the available- and delete-section
 ===== Feature Extraction =====
-The feature extraction can be realized with either the MEC or the CCA algorithm. Both approaches are described in the corresponding [http://opac.lbs-ilmenau.gbv.de/DB=1/SET=2/TTL=1/CMD?ACT=SRCHA&IKT=1016&SRT=YOP&TRM=Development+of+a+BCI+based+on+real-time+neural+source+localization thesis].
+The feature extraction can be realized with either the MEC or the CCA algorithm. Both approaches are described in the corresponding [http://opac.lbs-ilmenau.gbv.de/DB=1/SET=2/TTL=1/CMD?ACT=SRCHA&IKT=1016&SRT=YOP&TRM=Development+of+a+BCI+based+on+real-time+neural+source+localization thesis]. Also the number of generated harmonics of the reference signal can be set in this frame.

← Older revision		Revision as of 13:04, 27 October 2016
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−	[[File:SSVEPConfigurationWindow.jpg\|~~10px~~\|~~framed~~\|~~link=~~]]	+	[[File:SSVEPConfigurationWindow.jpg\|right\|200px\| Configuration Window of the SSVEP-BCI plugin]]

← Older revision		Revision as of 13:01, 27 October 2016
Line 15:		Line 15:


−	[[File:SSVEPConfigurationWindow.jpg\|~~100px~~\|framed\|link=]]	+	[[File:SSVEPConfigurationWindow.jpg\|10px\|framed\|link=]]