PUPIL SIZE CHART SOFTWARE

A developed 120-fps pupillometry demo system was able to achieve a calibration accuracy of 0.003 mm and an averaged temporal pupil measurement detection accuracy of 0.0059 mm in stereo mode. We offer a selection of six state-of-the-art open-source pupil detection algorithms (Starburst, Swirski, ExCuSe, ElSe, PuRe and PuReST) to perform the pupil measurement.

PUPIL SIZE CHART SOFTWARE

This work’s core outcome is an integrated cross-platform (macOS, Windows and Linux) pupillometry software called PupilEXT, featuring a user-friendly graphical interface covering the relevant requirements of professional pupil response research.

Our goal was to make a professional remote pupil measurement pipeline for laboratory conditions accessible for everyone. Here, we developed an open-source pupillometry platform consisting of hardware and software competitive with high-end commercial stereo eye-tracking systems. Moreover, commercial systems rely on closed software, restricting conclusions about the used pupil-tracking algorithms. Mostly commercial solutions are used as measurement devices in pupillometry which is associated with high investments. Diameter changes in the range of 10 –2 mm are of interest, requiring reliable and characterized measurement equipment to accurately detect neurocognitive effects on the pupil. The human pupil behavior has gained increased attention due to the discovery of the intrinsically photosensitive retinal ganglion cells and the afferent pupil control path’s role as a biomarker for cognitive processes. 2Interactive Graphic Systems, Department of Computer Science, Technical University of Darmstadt, Darmstadt, Germany.

1Laboratory of Lighting Technology, Department of Electrical Engineering and Information Technology, Technical University of Darmstadt, Darmstadt, Germany.

Babak Zandi 1*, Moritz Lode 1, Alexander Herzog 1, Georgios Sakas 2 and Tran Quoc Khanh 1

Pupil size chart