Hardware calibration of eye tracker

A method of hardware calibrating a gaze tracking device with respect to a display unit by determining the actual position of the gaze tracking device with respect to the display unit and determining the size of the active area on the display unit within which the gaze tracking device is to track a user's gaze point, the method comprising:

• presenting at least one graphical guide object on an active area of the display unit, the at least one graphical guide object designating at least one distinctive feature of the gaze tracking device reflecting how the gaze tracking device may be positioned on a first side of a frame of the display unit;
• moving, in response to at least one user input movement command, at least one of the at least one graphical guide object on the active area in a first direction parallel to the first side of the frame;
• assigning, based on a current position of the at least one graphical guide object on the active area, a position value designating an actual position for the gaze tracking device on one first side of the frame;
• calculating an offset value based on the assigned position value and a known measure of the active area, the offset value representing a distance in the first direction between a well-defined point of the gaze tracking device and a well-defined point of the first side;
• determining a width measure and a height measure reflecting a physical extension of the active area;
• and
• storing, in response to a user input confirmation command, the offset value, the width measure and the height measure for use when determining a user's gaze point on the active area.

A non-transitory computer readable medium, having a computer program recorded thereon, where the computer program comprises instructions for operation by a computing processor and for hardware calibrating a gaze tracking device with respect to a display unit by determining the actual position of the gaze tracking device with respect to the display unit and determining the size of the active area on the display unit within which the gaze tracking device is to track a user's gaze point, said instructions comprising:

• instructions for presenting at least one graphical guide object on an active area of the display unit, the at least one graphical guide object designating at least one distinctive feature of a gaze tracking device reflecting how the gaze tracking device may be positioned on a first side of a frame of the display unit;
• instructions for moving, in response to at least one user input movement command, at least one of the at least one graphical guide object on the active area in a first direction parallel to the first side of the frame;
• instructions for assigning, based on a current position of the at least one graphical guide object on the active area, a position value designating an actual position for the gaze tracking device on one first side of the frame;
• instructions for calculating an offset value based on the assigned position value and a known measure of the active area, the offset value representing a distance in the first direction between a well-defined point of the gaze tracking device and a well-defined point of the first side;
• instructions for determining a width measure and a height measure reflecting a physical extension of the active area;
• and
• instructions for storing, in response to a user input confirmation command, the offset value, the width measure and the height measure for use when determining a user's gaze point on the active area.