Contents tagged with calibration
26 Sep 2011
EventIDE provides a built-in calibration procedure for all supported eye-tracker models. The built-in GLM calibration is recommended, even if you calibrate your eye-tracker with native manufacturer tools. The GLM calibration procedure uses the least square linear method to fit the eye-tracker gaze positions to pixel coordinates on the screen. The linear fitting is done separately for X and Y signals and results in estimation of two pairs of coefficients of a General Liner Model: X Gain, X offset and Y gain and Y offset. The coefficients are applied into GLM equations (shown below) that are later used in EventIDE during runtime eye-tracking.