Title :
A new instrument to measure the shape of the cornea based on pseudorandom color coding
Author :
Vos, Franciscus M. ; Van der Heijde, Rob G L ; Spoelder, Hans J W ; Van Stokkum, Ivo H M ; Groen, Franciscus C A
Author_Institution :
Dept. of Phys. & Astron., Vrije Univ., Amsterdam, Netherlands
fDate :
8/1/1997 12:00:00 AM
Abstract :
We have developed a prototype instrument providing a new way to measure the shape of the cornea. Our approach exploits properties of pseudorandom binary arrays (PRBAs). Encoded in a colored pattern (stimulus) that is mirrored to the eye, a large PRBA allows for unique identification of unambiguously characterized positions both in stimulus and 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 :
biology computing; biomedical measurement; computerised instrumentation; eye; image coding; image colour analysis; medical image processing; parameter estimation; shape measurement; biomedical signal analysis; colored pattern; cornea shape measurement; identification; image processing; integral reconstruction; parameter estimation; prototype instrument; pseudorandom binary arrays; pseudorandom color coding; reflected image; robust measurement; stimulus; Astronomy; Biomedical measurements; Cornea; Instruments; Optical refraction; Physics; Reflection; Robustness; Shape measurement; Surface reconstruction;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
