Browsing by Author "Torres Urgell, Lluís"
Now showing items 1-20 of 61
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A block adaptive pyramid coding system
(1988)
Conference report
Open AccessIn this paper we present a new block adaptive coding scheme which uses non-rectangular Laplacian Pyramid Algorithms. The proposed method JB adapted to the local image contents. The original image is broken into subimages ... -
A contribution to video coding using layers
(1998)
Conference report
Open AccessLayered representations of video sequences, originally introduced in [1], are important in several applications. Specifically, they are very appropriate for object tracking, object manipulation, content-based scalability ... -
A feature-based subband coding scheme
(Institute of Electrical and Electronics Engineers (IEEE), 1996)
Conference report
Restricted access - publisher's policyA feature-based subband coding scheme is presented. It is intended for the coding of the texture component of a two-component image model. The primary component contains the strong edges, individually described by their ... -
A new adaptive method for image compression using Karhunen-Loeve transform
(Institute of Electrical and Electronics Engineers (IEEE), 1987)
Conference report
Open AccessThe Karhunen-Loeve transformation (KLT) is an optimal method for encoding images in the MSE sense. Only one spatially adaptive method is known to be reported in the literature. Many other suboptimal encoding methods have ... -
A new approach to texture coding using stochastic vector quantization
(IEEE Computer Society, 1994)
Conference report
Open AccessA new method for texture coding which combines 2-D linear prediction and stochastic vector quantization is presented in this paper. To encode a texture, a linear predictor is computed first. Next, a codebook following the ... -
A non-rectangular pyramid coding system
(1988)
Conference report
Open AccessRectangular sampling lattices bave been extensively applied to image coding. Sampling is a fundamental orera.tion m image coding systems as a proper selection of the sampling lattice minimizes the physica support of the ... -
A region-based subband coding scheme
(1997-07)
Article
Restricted access - publisher's policyThis paper describes a region-based subband coding scheme intended for efficient representation of the visual information contained in image regions of arbitrary shape. QMF filters are separately applied inside each region ... -
A robust motion estimation and segmentation approach to represent moving images with layers
(IEEE COMPUTER SOCIETY, 1997)
Conference report
Open AccessThe paper provides a robust representation of moving images based on layers. To that goal, we have designed efficient motion estimation and segmentation techniques by affine model fitting suitable for the construction of ... -
A simple and efficient face detection algorithm for video database applications
(Institute of Electrical and Electronics Engineers (IEEE), 2000)
Conference report
Open AccessThe objective of this work is to provide a simple and yet efficient tool to detect human faces in video sequences. This information can be very useful for many applications such as video indexing and video browsing. In ... -
Actividades en procesado de la imagen del Grupo de Procesado de Señal
(Escola Tècnica Superior d'Enginyers de Telecomunicació de Barcelona, 1993)
Article
Open Access -
Algoritmos de clasificacion de contenido visual
(2012-06-26)
Research report
Restricted access - confidentiality agreementEntregable E.3.2.1. -
Algoritmos de clasificación de eventos simples a partir de descriptores multimodales
(2012-02-15)
Research report
Restricted access - confidentiality agreementDeriberable 4.1.1 -
An adaptive pyramid image coding system
(Institute of Electrical and Electronics Engineers (IEEE), 1988)
Conference report
Open AccessThe Laplacian Pyramid is a new and efficient method for image encoding. The method is of increasing interest as band-pass pyramids and multiresolution images are being used in other image processing applications. The Pyramid ... -
An efficient technique of texture representation in segmentation-based image coding schemes
(IEEE IEEE, 1995)
Conference report
Open AccessIn segmentation-based image coding techniques the image to be compressed is first segmented. Then, the information is coded describing the shape and the interior of the regions. A new method to encode the texture obtained ... -
An improvement on codebook search for vector quantization
(1994-02)
Article
Open AccessPresents a simple but effective algorithm to speed up the codebook search in a vector quantization scheme when a MSE criterion is used. A considerable reduction in the number of operations is achieved. This algorithm was ... -
Analysis and synthesis of textures through the inference of Boolean functions
(1997-05)
Article
Restricted access - publisher's policyThis work deals with Boolean functions of non-linear and linear basis. The Boolean random functions of non-linear basis were proposed by Serra (1988,1989). These functions are generated through a Poisson point process upon ... -
Análisis de no estacionariedades en la interpolación de imágenes. Aplicación a codificación piramidal y zoom
(1991)
Conference report
Open AccessIn some applications of digital image processing the fact that an image is a non estacionary signal can cause some undesirable effects. That is the case of block effect in transform coding, or destructive effects on contours ... -
Anotaciones de las bases de datos
(2011-11-30)
Research report
Restricted access - confidentiality agreementEntregable 1.2.2 -
Automatic face recognition of video sequences using self-eigenfaces
(-, 2000)
Conference report
Open AccessThe objective of this work is to provide an efficient face recognition scheme useful for video indexing applications. In particular we are addressing the following problem: given a set of known images and given a video ... -
Automatic left ventricular contour extraction for volume calculation from echocardiographic images
(1989)
Conference report
Open AccessThis paper presents a new fully automated algorithm that extracts LV epicardial and endocardial borders from 2-D echocardiograms. The method is based on a radial search approach, which is the best way to use some a priori ...
