title: Local fringe density determination by adaptive filtering.
abstract: We demonstrate a method to easily and quickly determine the local fringe density map of a fringe pattern. The method is based on an isotropic adaptive bandpass filter that is tuned at different frequencies. The modulation map after applying a specific bandpass frequencies filter presents a maximum response in the regions where the bandpass filter and fringe frequencies coincide. We show a set of simulations and experimental results that prove the effectiveness of the proposed method.
authors.affiliation: Laboratorio de Instrumentación Espacial, Instituto Nacional de Técnica Aeroespacial, Carretera de Ajalvir Km 4, 28850, Torrejón de Ardoz, Madrid, Spain. jvargas@fis.ucm.es
authors.forename: J
authors.initials: J
authors.lastname: Vargas
authors.forename: J Antonio
authors.initials: JA
authors.lastname: Quiroga
authors.forename: T
authors.initials: T
authors.lastname: Belenguer