Retrieved models by sample size.

The algorithm is able to find the mapping model for the three different data samples. The number of the coefficients remains the same, however, the mean absolute error (MAE) / mean squared error (MSE) values changes. The differences are small are lesser than the size of a pixel (e.g, Δ(200-150) = 0.046, Δ(150-75) = 0.0432). This means that when calculating the gaze position in the camera frame, these differences are not noticeable.