Pupil Center as a Function of Pupil Diameter

Zaheer Ahmed, Diako Mardanbegi, Dan Witzner Hansen

Research output: Conference Article in Proceeding or Book/Report chapterArticle in proceedingsResearchpeer-review


We investigate the gaze estimation error induced by pupil size changes using simulated data. We investigate the influence of pupil diameter changes on estimated gaze point error obtained by two gaze estimation models. Simulation data show that at wider viewing angles and at small eye-camera distances, error increases with increasing pupil sizes. The maximum error recorded for refracted pupil images is 2.4° of visual angle and 1.5° for non-refracted pupil projections.
Original languageEnglish
Title of host publicationETRA '16 Proceedings of the Ninth Biennial ACM Symposium on Eye Tracking Research & Applications
Number of pages4
PublisherAssociation for Computing Machinery
Publication date14 Mar 2016
ISBN (Print)978-1-4503-4125-7
Publication statusPublished - 14 Mar 2016


  • image processing, eye tracking, gaze estimation, pupildynamics, human computer interaction


Dive into the research topics of 'Pupil Center as a Function of Pupil Diameter'. Together they form a unique fingerprint.

Cite this