10-05-2022 04:31 PM
Hello Everyone
Here I include the rar file used.
This program is used to detect eye movements based on the polarity of the signal. the polarity detected on channel 1 and channel 2 is the half-signal polarity.
eye activity that is detected looking up is when the eye from its normal position then looks up. but when looking back to the normal position, a signal will be detected as when looking down.
So, I want to combine 2 eye movements to make one command. this way I have to determine the polarity of the signal for the 2 movements. where the polarity will cross the threshold. like the following picture.
But i don't know how to detect the polarity if there's crossing threshold.
10-05-2022 10:29 PM
@Array01 wrote:
Hello Everyone
Here I include the rar file used. No, there were no attachments.
This program is used to detect eye movements based on the polarity of the signal. the polarity detected on channel 1 and channel 2 is the half-signal polarity. What are the two signals? Horizontal & Vertical Eye position? In what units (degrees, mV, something else?)eye activity that is detected looking up is when the eye from its normal position then looks up. but when looking back to the normal position, a signal will be detected as when looking down. This doesn't make a lot of sense.
So, I want to combine 2 eye movements to make one command. this way I have to determine the polarity of the signal for the 2 movements. where the polarity will cross the threshold. like the following picture. This doesn't make much sense either.
But i don't know how to detect the polarity if there's crossing threshold.
Some comments (from someone who has, in fact, recorded 3D Eye Positions in human subjects):
If the above questions seem unfamiliar to you. you may need to learn a little about rotatory movements of (spherical) objects. Note that you can also say you want to study only horizontal movements involving the eye rotating about an earth-vertical axis, or vertical movements where the eye rotates in a vertical plane that includes the initial gaze position.
If this sounds too mysterious and weird to you (it can get even more complicated!), I recommend first solving the 1D problem of horizontal eye movements that start with the eye looking along an axis lying in an earth-horizontal plane that intersects the eye, with movements (or gaze positions) that remain in this horizontal plane.
Bob Schor
10-06-2022 01:36 AM
thanks for the response sir
Here I include the rar file used.
This program is used to detect eye movements based on the polarity of the signal. the polarity detected on channel 1 and channel 2 is the half-signal polarity. I will use this motion detection result as a command input for the device.
in this program, the polarity relationship with the command as shown below.
after I did some research, it turns out that eye activity that is detected looking up is when the eye is from its normal position and then looks up. but when looking back to the normal position, a signal will be detected as when looking down.
So, I want to combine 2 eye movements to make one command. this way i have to determine the polarity of the signal for the 2 movements. where the polarity will cross the threshold. like the following picture.