How to interpret norm_pos_x/y? Some of them are beyong 0-1 range

[weix...@gmail.com]

So I exported the raw data and found that some norm_pos_x norm_pos_y are beyond 0 to 1 range (all the way up to 100 and some are negative). To my understanding, Pupil uses normalized coordinates, with 0,0 being the bottom left and 1,1 being the top right, but why am I getting this?

[Antonio Lutfi]

I asked the same question some years back. It's because, at that frame, the eye was gazing outside of the bounds of the frame

Antonio 

On Jan 21, 2018 6:25 AM, <weix...@gmail.com> wrote:

So I exported the raw data and found that some norm_pos_x norm_pos_y are beyond 0 to 1 range (all the way up to 100 and some are negative). To my understanding, Pupil uses normalized coordinates, with 0,0 being the bottom left and 1,1 being the top right, but why am I getting this?

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[weix...@gmail.com]

Thank you!
For my research, it means I have to remove all those negative data points, then...

On Saturday, January 20, 2018 at 6:28:27 PM UTC-5, Antonio Lutfi wrote:
> I asked the same question some years back. It's because, at that frame, the eye was gazing outside of the bounds of the frame
>
>
> Antonio 
>
>
> On Jan 21, 2018 6:25 AM, <weix...@gmail.com> wrote:
> So I exported the raw data and found that some norm_pos_x norm_pos_y are beyond 0 to 1 range (all the way up to 100 and some are negative). To my understanding, Pupil uses normalized coordinates, with 0,0 being the bottom left and 1,1 being the top right, but why am I getting this?
>
>
>
> --
>
> You received this message because you are subscribed to the Google Groups "pupil-discuss" group.
>

> To unsubscribe from this group and stop receiving emails from it, send an email to pupil-discus...@googlegroups.com.