Hi Jason,
On Thu, Dec 20, 2012 at 5:58 PM, Jason Resch <[email protected]> wrote: > > > On Thu, Dec 20, 2012 at 5:17 AM, Telmo Menezes <[email protected]>wrote: > >> Hi Roger, >> >> >>> I accidentally sent the previous email before >>> I was done, sorry. Please consider this more complete version >>> of the intended whole: >>> >>> Hi Telmo, >>> >>> Those images in the videoclips, while still remarkable, >>> probably were constructed simply by monitoring >>> sensory MRI signals just as one might from a video camera, >>> and displaying them as a raster pattern, artificially >>> converting the time voltage signal into a timespace signal. >>> >> >> Ok. We're not even sure what we're looking at. The brain is a gigantic^n >> kludge. We are seeing stuff happening in the visual cortex that can be >> meaningfully mapped to images. This stuff correlates with what the subject >> is seeing, but in a weird way. So we can speculate that we're watching, for >> example, a pattern matching process taking place. The most spectacular >> thing for me is when we see the anticipation of the ink blot explosion. >> That's something you wouldn't get from a video camera (but you could get >> from a computer running a sophisticated AI). >> >> > > The video we see is an amalgamation of the 100 video clips which most > closely match the viewer's current brain activity compared to when the > viewer watched each of those video clips. > That's just a practical detail. The 100 video clips amalgamation is just a way to reduce noise from a still very imperfect system. > It makes for an impressive display, is a very creative idea, and shows we > can use technology to read thoughts, but the raw data used to generate the > video above was just a set of ID's for any one of the control videos the > subject watched to set the baseline. We are not really seeing an image > created directly from one's brain activity. > We're unlikely to ever see that, because brain activity does not generate jpg files. But we are seeing images that correlate with brain activity and that's a type of encoding. > > Jason > > -- > You received this message because you are subscribed to the Google Groups > "Everything List" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]. > For more options, visit this group at > http://groups.google.com/group/everything-list?hl=en. > -- You received this message because you are subscribed to the Google Groups "Everything List" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/everything-list?hl=en.
