BIOMETRICAL ANALYSIS OF PUPILLARY OPENING USING IMAGE PROCESSING PROCEDURES

Abstract

Pupil reflex as a feed-back reaction at the visual function level is a complex mechanism that can indicate, through deviations from normality, a very large range of ocular dysfunctions. In the first part of the paper are presented some anatomical and pathological aspects related to the configuration of the iris and the pupil, and respectively the physiological limits of functioning. In the second part of the paper there are some other researches that have as main purpose the determination of the behavior of the visual system through the pupil reflex, when the visible light radiation reaches the level of the iris and the pupil. In the third part of the paper is presented the image processing procedure applied for determining the contour of the iris-pupil assembly and the dimensional measurement of the pupil opening in real time, in the case of the IR (infrared radiation) illumination, in the case of the experimental setup. In the final part of the paper are presented the results and the conclusions regarding the methodology and the possibilities of dimensional evaluation of pupil and iris through image processing procedures.