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openyou / emokit

Open source driver for accessing raw data from the Emotiv EPOC EEG headset
http://www.openyou.org
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8000 value #109

Closed Joaquimdcp closed 10 years ago

Joaquimdcp commented 10 years ago

Hi there, I wear the helmet numbers are around the value of 8000 but when I put it continue in 8000 but slightly mad dynamic as I know that the sensors make good contact?

Thank you

olorin commented 10 years ago

I can't tell if there's an actual question or issue here. Can you rephrase?

warrenarea commented 10 years ago

yes the values you are getting are correct, the 8,000 is actually two bytes strung together. data+quality
if i understand it right the 'data' is the neural activity, and the 'quality' is rated 0-4 on the quality of the signal.

warrenarea commented 10 years ago

I was incorrect in this matter, I thought that the value was 'data and quality' compressed together into two bytes, but its actually just one.

"Emokit parses the sensor values as an unsigned integer. Thus, to get values between -8192 and 8192, subtract 8192. "

ghost commented 10 years ago

That makes a lot of sense. Need to change that in the code then.

On Sep 18, 2014, at 12:57 PM, warrenarea notifications@github.com<mailto:notifications@github.com> wrote:

I was incorrect in this matter, I thought that the value was 'data and quality' compressed together into two bytes, but its actually just one.

"Emokit parses the sensor values as an unsigned integer. Thus, to get values between -8192 and 8192, subtract 8192. "

— Reply to this email directly or view it on GitHubhttps://github.com/openyou/emokit/issues/109#issuecomment-56077547.