Where is th origin of the coordinates system?

[act_jemy]

Good morning everyone,
I am starting right now with my eye tracker and trying some simple coding with Java.
I read that gaze coordinates are given in a top-left oriented 2D coordinates system but I can't understand where is the origin. Is it in the center of the screen? Or on top of a corner?

Thank you in advance.

Best regards,
Jessica

[kimarionizetha]

i think the origin of the coordinate is on the top left .

[Martin]

Correct, top left is 0,0