look_vec[0] = -look_vec[0]? about gazeml HOT 2 CLOSED

I applied this negation to match the coordinate system of the gaze vector to that used commonly in datasets such as MPIIGaze and UT Multiview (OpenGL to standard camera coordinates).

The gaze vector there is defined to be relative to the camera, and a negation to both pitch and yaw are applied to make the frontal-gaze (0, 0) be one where the eyes stare straight into the normalized camera. The final gaze vector in the code segment you're referring to in src/datasources/unityeyes.py yields such a set of pitch-yaw values where they have to be negated before conversion to unit vector representation, for the final angular distance/error calculation.

Also see https://www.mpi-inf.mpg.de/departments/computer-vision-and-multimodal-computing/research/gaze-based-human-computer-interaction/appearance-based-gaze-estimation-in-the-wild/ for reference on this.

from gazeml.

Thank you so much

from gazeml.