Coordinate systems in Stytra¶
Stytra follows the common convention for displaying images on screens: the x axis increases to the right and the y axis increases downward, with (0,0) being the upper right corner. For the recorded coordinates, the same holds. The angles correspondingly increase clockwise.
Calibration establishes a mapping between the camera and projector coordinate systems.
matrices transform points from one coordinate system to another.
Visual stimuli are usually configured to take dimensions in millimeters, whereas the scaling factor is taken from the calibration procedure.