title: Open-access operating algorithms for commercial videokeratographer and improvement of corneal sampling.
abstract: We present an algorithm to process images of reflected Placido rings captured by a commercial videokeratoscope. Raw data are obtained with no Cartesian-to-polar-coordinate conversion, thus avoiding interpolation and associated numerical artifacts. The method provides a characteristic equation for the device and is able to process around 6 times more corneal data than the commercial software. Our proposal allows complete control over the whole process from the capture of corneal images until the computation of curvature radii.
authors: Instituto Universitario de Física Aplicada a las Ciencias y las Tecnologías, Universidad de Alicante, Alicante, Spain. julian.espinosa@ua.es
authors: Julián
authors: J
authors: Espinosa
authors: David
authors: D
authors: Mas
authors: Jorge
authors: J
authors: Pérez
authors: Ana Belén
authors: AB
authors: Roig
mesh_terms: D000465:Algorithms; D016477:Artifacts; D002138:Calibration; D003315:Cornea / Q000502:physiology*; D019781:Corneal Topography; D003952:Diagnostic Imaging / Q000379:methods; D004867:Equipment Design; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000295:instrumentation / Q000379:methods; D012984:Software; D013499:Surface Properties; D014741:Video Recording / Q000379:methods