Method of Determining Reflections of Light

Research output: Patent


A method of filtering glints by processing an image of a user's cornea to obtain coordinates of desired glints from a configuration of light sources, comprising processing an image, in a first image space, of a user's cornea to determine coordinates of respective multiple positions of glints; and iteratively: selecting from the coordinates a first and a second set of coordinates; computing from the first set of coordinates a transformation that transforms the first set of coordinates into first coordinates of a predetermined spatial configuration; and testing whether the transformation transforms also the second set into positions that match second positions of the predetermined configuration. The coordinates of the desired glints are selected as those first and second sets which are transformed into coordinates that match the first and second coordinates of the predetermined configuration. The method is based on a geometrical homography and is expedient for robust gaze estimation in connection with e.g. eye tracking.
Original languageEnglish
Country/TerritoryUnited States
Priority date29/10/2010
Priority numberWO2010EP66495 20101029
Publication statusPublished - 1 Feb 2014


  • Gaze Estimation
  • Glint Filtering
  • Geometrical Homography
  • Eye Tracking
  • Light Source Configuration


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