INTECIN   20395
INSTITUTO DE TECNOLOGIAS Y CIENCIAS DE LA INGENIERIA "HILARIO FERNANDEZ LONG"
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Development of a low cost pupillometer-eyetracker and applications
Autor/es:
ARTURO BIANCHETTI; LILIANA I. PEREZ; SILVIA A. COMASTRI
Lugar:
Porto
Reunión:
Congreso; 8th Ibero American Optics Meeting/11th Latin American Meeting on Optics, Lasers, and Applications.; 2013
Institución organizadora:
Red Iberoamericana de Optica
Resumen:
The determination of ocular pupil diameter and gaze direction is important in various psychophysical and cognitive testsand can be accomplished using commercial, academic or open-source devices. In this work we develop a table-toppupillometer eyetracker termed Blick, the hardware costs 50 dollars and the software is open source(https://github.com/abianchetti/blick). The hardware is mounted in a portable holder and comprises an illuminationsystem (two infrared LEDs generating 0.13 W/m2 at 22 cm) and a detection system (containing an USB camera, aninfrared filter and a 16mm lens system) The software, programmed in C++ using OpenCV and cvblob libraries,processes eye images in real time and supplies plots and tables of pupil diameter and gaze direction and a video of theeye. As applications, capturing the right eye of six young emmetropes and after performing the pixel-mm andhomographic calibrations (required to determine diameter in mm and gaze direction), we conduct three tests. Thecorresponding tasks are to detect mistakes in three series of four poker cards, to recognize letters F between distractorsand to write a sentence via eye movements using Blick as eye tracker and the tool Dasher (MacKays´s CambridgeGroup). We obtain that Blick´s performance is satisfactory (errors being 0.05 mm in pupil diameter and 1 degree in gazedirection); that there are slight pupil dilations when subjects used to playing cards find mistakes and when some subjectsfind targets and, finally, that Blick can be employed as eyetracker to allow communication of disabled persons.