Pedro Henríquez

Learn More
We introduce a morphological approach to curve evolution. The differential operators used in the standard PDE snake models can be approached using morphological operations on a binary level set. By combining the morphological operators associated to the PDE components we achieve a new snakes evolution algorithm. This new solution is based on numerical(More)
We propose new mathematical models to study the variation of lens distortion models when modifying zoom setting in the case of zoom lenses. The new models are based on a polynomial approximation to account for the variation of the radial distortion parameters through the range of zoom lens settings and, on the minimization of a global error energy measuring(More)
The paper describes a 3D head pose tracking system designed for immersive applications. The proposed system is based on a random forest's head detection and pose regression model. The main novel contributions include the application, in immersive technologies, of a head tracker using a range data sensor, the Kalman filter and the random forest, with(More)
The aim of this paper is both: to introduce the project called HESPERIA (homeland security: technologies for the security in public spaces and infrastructures) and to describe the task about acoustic surveillance in the project. The objective of HESPERIA consortium is the development of technologies to allow the creation of innovative security systems,(More)
BACKGROUND Epidemiological evidence suggests a cardioprotective role of α-linolenic acid (ALA), a plant-derived ω-3 fatty acid. It is unclear whether ALA is beneficial in a background of high marine ω-3 fatty acids (long-chain n-3 polyunsaturated fatty acids) intake. In persons at high cardiovascular risk from Spain, a country in which fish consumption is(More)
Active contours, or snakes, are computer-generated curves that move within images to find out salient image structures like object boundaries. Energy based formulations using a level set approach have been successfully used to model the snake evolution. The Euler-Lagrange equation associated to such energies yields to partial differential equations (PDE)(More)
(2016) Wize Mirror-a smart, multisensory cardio-metabolic risk monitoring system. It is advisable to refer to the publisher's version if you intend to cite from the work. Keywords: Unobtrusive health monitoring 3D face detection Tracking and reconstruction 3D morphometric analysis Psychosomatic status recognition Multimodal data integration a b s t r a c t(More)
We propose a novel method for real-time camera motion tracking in planar view scenarios. This method relies on the geometry of a tripod, an initial estimation of camera pose for the first video frame and a primitive tracking procedure. This process uses lines and circles as primitives, which are extracted applying classification and regression tree. We have(More)