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jarrod · Joined: Apr 17, 2012 Posts: 9

I would like to use a key press to start an image presentation, and record a time-event marker into the EEG data file. What is the best way of doing this?

Can BioEra present Jpg images like a slideshow or just windows media as flash/wmp files?

jarrod · Joined: Apr 17, 2012 Posts: 9

Thanks for this....the examples that you have posted...how can i get to download? When i paste the link in my browser i just get script on the screen and the links don't seem to be clickable..

jarek · Joined: Oct 22, 2007 Posts: 1075

Yes, BioEra can show jpg images like a slideshow. You can use ImageSequencer and connect it to ImageDisplay. Then use anything like Button (or KeyboardSource) to trigger the input and send the images to display them.

The time event markers can be recorded with using XDF.

Here is an example how to write it:

http://proatech.com/design/xdf_write_annot.bpd

And here how to read a file written in above design:

http://proatech.com/design/xdf_read_annot.bpd

jarek · Joined: Oct 22, 2007 Posts: 1075

I made the links clickable now. When you click on any of them, you should see a dialog with option to save the file. Save the file and open it in BioEra.

jarrod · Joined: Apr 17, 2012 Posts: 9

Thanks for this...i have a couple of questions regarding the image presentation....using the image sequencer when you go to the settings tab you can see image files: [a.gif]
Do you have to specify a particular directory for the files, and can you give a list of files in that folder/directory?
Do you have to use gif format or can these also be jpg mov etc?

To activate the image with a key press i have joined the button box to the logical input. Is this correct?
I would also like this same keypress to make a mark in the data file ( presumably if the connect this to a something like edf writer it will do this...?

Also how do i specify timing between the events....ie the duration of each image on the screen.

Would it be possible for you to provide an example to work from?

jarek · Joined: Oct 22, 2007 Posts: 1075

The ImageSequencer can only get file names, no directories.

You could use OSInfo and option \"Files in folder\" to get a list of files in a particular folder. Then use PropertySetter and set the retrieved list into ImageSequencer.

Yes, other image files formats like jpg, bmp are supported.

Timing between events. Well there are many ways. For example Timer, which will send output values at defined time intervals.

jarrod · Joined: Apr 17, 2012 Posts: 9

thanks...

still having problems with the connections between the elements for the slideshow re: connections between the
elements. I get the OSInfo and option \"Files in folder\" to get a list of files in a particular folder.

The issue is the use PropertySetter and connecting this to the retrieved list into ImageSequencer. I also need to mark the start of each event in the data with either a keypress or a time marker

Would it be possible to post an example as it really helps to see the layout?

jarek · Joined: Oct 22, 2007 Posts: 1075

Here is an example. It loads image files from a folder and then displays them in 1 second interval.

http://proatech.com/design/ImageShow.bpd

jarrod · Joined: Apr 17, 2012 Posts: 9

thanks Jarek....it really helps to see the layout and connections