title: Acoustic Biometric System Based on Preprocessing Techniques and Linear Support Vector Machines.
abstract: Drawing on the results of an acoustic biometric system based on a MSE classifier, a new biometric system has been implemented. This new system preprocesses acoustic images, extracts several parameters and finally classifies them, based on Support Vector Machine (SVM). The preprocessing techniques used are spatial filtering, segmentation-based on a Gaussian Mixture Model (GMM) to separate the person from the background, masking-to reduce the dimensions of images-and binarization-to reduce the size of each image. An analysis of classification error and a study of the sensitivity of the error versus the computational burden of each implemented algorithm are presented. This allows the selection of the most relevant algorithms, according to the benefits required by the system. A significant improvement of the biometric system has been achieved by reducing the classification error, the computational burden and the storage requirements.
authors.affiliation: Departamento de Ciencia de los Materiales e Ingeniería Metalúrgica, Expresión Gráfica de la Ingeniería, Ingeniería Cartográfica, Geodesia y Fotogrametría, Ingeniería Mecánica e Ingeniería de los Procesos de Fabricación, Área de Ingeniería Mecánica, Universidad de Valladolid, Paseo del Cauce 59, 47011 Valladolid, Spain. lvalpue@eii.uva.es.
authors.forename: Lara
authors.initials: L
authors.lastname: del Val
authors.affiliation: Departamento de Teoría de la Señal y Comunicaciones e Ingeniería Telemática, Universidad de Valladolid, Paseo Belén 15, 47011 Valladolid, Spain. alberto.izquierdo@tel.uva.es.
authors.forename: Alberto
authors.initials: A
authors.lastname: Izquierdo-Fuente
authors.affiliation: Departamento de Teoría de la Señal y Comunicaciones e Ingeniería Telemática, Universidad de Valladolid, Paseo Belén 15, 47011 Valladolid, Spain. juavil@tel.uva.es.
authors.forename: Juan J
authors.initials: JJ
authors.lastname: Villacorta
authors.affiliation: Informática, Universidad Pontificia de Salamanca, Calle Compañía 5, 37002 Salamanca, Spain. mrabosoma@upsa.es.
authors.forename: Mariano
authors.initials: M
authors.lastname: Raboso
mesh_terms: D000162:Acoustics; D001699:Biometry / Q000379:methods*; D005260:Female; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods*; D008297:Male; D012815:Signal Processing, Computer-Assisted; D060388:Support Vector Machine
keywords: acoustic biometric system; acoustic images; preprocessing techniques; support vector machine