A new PRBA-based instrument to measure the shape of the cornea

Author

Vos, F.M. ; van der Heijde, G.L. ; Spoelder, H.J.W. ; van Stokkum, I.H.M. ; Groen, Frans C A

Author_Institution

Dept. of Phys. & Astron., Vrije Univ., Amsterdam, Netherlands

Volume

1

fYear

1996

fDate

1996

Firstpage

416

Abstract

We have developed a prototype-instrument providing a new way to measure the shape of the cornea. Our approach exploits properties of pseudo random binary arrays (PRBAs). Encoded in a coloured pattern (stimulus) that is mirrored to the eye PRBAs allow for unique characterization of positions both in the stimulus and the reflected image. This is used to come to an integral reconstruction of the cornea. It is demonstrated that the new technique contributes to a very robust measurement method

Keywords

CCD image sensors; biomedical measurement; colour vision; eye; image recognition; image reconstruction; light refraction; random processes; shape measurement; CCD image sensor; PRBA; coloured pattern; cornea; identification; integral reconstruction; keratometer; pattern recognition; prototype-instrument; pseudo random binary arrays; reconstruction; reflected image; relocation; shape; stimulus; unique characterization; Astronomy; Cornea; Extraterrestrial measurements; Humans; Image reconstruction; Instruments; Optical refraction; Physics; Reflection; Shape measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Instrumentation and Measurement Technology Conference, 1996. IMTC-96. Conference Proceedings. Quality Measurements: The Indispensable Bridge between Theory and Reality., IEEE

Conference_Location

Brussels

Print_ISBN

0-7803-3312-8

Type

conf

DOI

10.1109/IMTC.1996.507417

Filename

507417