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Search Results: 1 - 10 of 179482 matches for " Arturo de la Escalera "
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Recognition Stage for a Speed Supervisor Based on Road Sign Detection
Juan-Pablo Carrasco,Arturo de la Escalera de la Escalera,José María Armingol
Sensors , 2012, DOI: 10.3390/s120912153
Abstract: Traffic accidents are still one of the main health problems in the World. A number of measures have been applied in order to reduce the number of injuries and fatalities in roads, i.e., implementation of Advanced Driver Assistance Systems (ADAS) based on image processing. In this paper, a real time speed supervisor based on road sign recognition that can work both in urban and non-urban environments is presented. The system is able to recognize 135 road signs, belonging to the danger, yield, prohibition obligation and indication types, and sends warning messages to the driver upon the combination of two pieces of information: the current speed of the car and the road sign symbol. The core of this paper is the comparison between the two main methods which have been traditionally used for detection and recognition of road signs: template matching (TM) and neural networks (NN). The advantages and disadvantages of the two approaches will be shown and commented. Additionally we will show how the use of well-known algorithms to avoid illumination issues reduces the amount of images needed to train a neural network.
Automatic Chessboard Detection for Intrinsic and Extrinsic Camera Parameter Calibration
Arturo De la Escalera,Jose María Armingol
Sensors , 2010, DOI: 10.3390/s100302027
Abstract: There are increasing applications that require precise calibration of cameras to perform accurate measurements on objects located within images, and an automatic algorithm would reduce this time consuming calibration procedure. The method proposed in this article uses a pattern similar to that of a chess board, which is found automatically in each image, when no information regarding the number of rows or columns is supplied to aid its detection. This is carried out by means of a combined analysis of two Hough transforms, image corners and invariant properties of the perspective transformation. Comparative analysis with more commonly used algorithms demonstrate the viability of the algorithm proposed, as a valuable tool for camera calibration.
Driver Drowsiness Warning System Using Visual Information for Both Diurnal and Nocturnal Illumination Conditions
Flores MarcoJavier,Armingol JoséMaría,de la Escalera Arturo
EURASIP Journal on Advances in Signal Processing , 2010,
Abstract: Every year, traffic accidents due to human errors cause increasing amounts of deaths and injuries globally. To help reduce the amount of fatalities, in the paper presented here, a new module for Advanced Driver Assistance System (ADAS) which deals with automatic driver drowsiness detection based on visual information and Artificial Intelligence is presented. The aim of this system is to locate, track, and analyze both the drivers face and eyes to compute a drowsiness index, where this real-time system works under varying light conditions (diurnal and nocturnal driving). Examples of different images of drivers taken in a real vehicle are shown to validate the algorithms used.
Identifying and Tracking Pedestrians Based on Sensor Fusion and Motion Stability Predictions
Basam Musleh,Fernando García,Javier Otamendi,José Ma Armingol,Arturo De la Escalera
Sensors , 2010, DOI: 10.3390/s100908028
Abstract: The lack of trustworthy sensors makes development of Advanced Driver Assistance System (ADAS) applications a tough task. It is necessary to develop intelligent systems by combining reliable sensors and real-time algorithms to send the proper, accurate messages to the drivers. In this article, an application to detect and predict the movement of pedestrians in order to prevent an imminent collision has been developed and tested under real conditions. The proposed application, first, accurately measures the position of obstacles using a two-sensor hybrid fusion approach: a stereo camera vision system and a laser scanner. Second, it correctly identifies pedestrians using intelligent algorithms based on polylines and pattern recognition related to leg positions (laser subsystem) and dense disparity maps and u-v disparity (vision subsystem). Third, it uses statistical validation gates and confidence regions to track the pedestrian within the detection zones of the sensors and predict their position in the upcoming frames. The intelligent sensor application has been experimentally tested with success while tracking pedestrians that cross and move in zigzag fashion in front of a vehicle.
Driver Drowsiness Warning System Using Visual Information for Both Diurnal and Nocturnal Illumination Conditions
Marco Javier Flores,José María Armingol,Arturo de la Escalera
EURASIP Journal on Advances in Signal Processing , 2010, DOI: 10.1155/2010/438205
Abstract: Every year, traffic accidents due to human errors cause increasing amounts of deaths and injuries globally. To help reduce the amount of fatalities, in the paper presented here, a new module for Advanced Driver Assistance System (ADAS) which deals with automatic driver drowsiness detection based on visual information and Artificial Intelligence is presented. The aim of this system is to locate, track, and analyze both the drivers face and eyes to compute a drowsiness index, where this real-time system works under varying light conditions (diurnal and nocturnal driving). Examples of different images of drivers taken in a real vehicle are shown to validate the algorithms used.
Distributed Pedestrian Detection Alerts Based on Data Fusion with Accurate Localization
Fernando García,Felipe Jiménez,José Javier Anaya,José María Armingol,José Eugenio Naranjo,Arturo de la Escalera
Sensors , 2013, DOI: 10.3390/s130911687
Abstract: Among Advanced Driver Assistance Systems (ADAS) pedestrian detection is a common issue due to the vulnerability of pedestrians in the event of accidents. In the present work, a novel approach for pedestrian detection based on data fusion is presented. Data fusion helps to overcome the limitations inherent to each detection system (computer vision and laser scanner) and provides accurate and trustable tracking of any pedestrian movement. The application is complemented by an efficient communication protocol, able to alert vehicles in the surroundings by a fast and reliable communication. The combination of a powerful location, based on a GPS with inertial measurement, and accurate obstacle localization based on data fusion has allowed locating the detected pedestrians with high accuracy. Tests proved the viability of the detection system and the efficiency of the communication, even at long distances. By the use of the alert communication, dangerous situations such as occlusions or misdetections can be avoided.
Context-Aided Sensor Fusion for Enhanced Urban Navigation
Enrique David Martí,David Martín,Jesús García,Arturo de la Escalera,José Manuel Molina,José María Armingol
Sensors , 2012, DOI: 10.3390/s121216802
Abstract: ?The deployment of Intelligent Vehicles in urban environments requires reliable estimation of positioning for urban navigation. The inherent complexity of this kind of environments fosters the development of novel systems which should provide reliable and precise solutions to the vehicle. This article details an advanced GNSS/IMU fusion system based on a context-aided Unscented Kalman filter for navigation in urban conditions. The constrained non-linear filter is here conditioned by a contextual knowledge module which reasons about sensor quality and driving context in order to adapt it to the situation, while at the same time it carries out a continuous estimation and correction of INS drift errors. An exhaustive analysis has been carried out with available data in order to characterize the behavior of available sensors and take it into account in the developed solution. The performance is then analyzed with an extensive dataset containing representative situations. The proposed solution suits the use of fusion algorithms for deploying Intelligent Transport Systems in urban environments.
El Padre Isla y su familia en Santiago
Martínez de la Escalera, José
Cuadernos de Estudios Gallegos , 1994,
Abstract: Not available. No disponible.
p-Charlar
DE LA PLAYA ARTURO
Desde el Jardín de Freud , 2003,
Abstract: Para el psicoanálisis existe una verdad que afirma que no hay relación sexual. fue bajo la influencia de la lógica matemática que Lacan se permitió formular una novedosa teoría de la sexuación y de los determinantes que deciden sobre una posición masculin
El sujeto de la memoria colectiva
Ana María Martínez de la Escalera
Revista Observaciones Filosóficas , 2007,
Abstract: En el texto se conduce la lectura política de una movilización (las madres argentinas de la Plaza de mayo) en demanda de justicia absoluta. Demanda que recusa las lecturas habituales (éticas y políticas) y plantea ante todo la importancia y a la vez los límites de una apuesta que se juega todo por la visibilidad. deben los movimientos de resistencia resignarse a la pura demanda de visibilidad? es esto hacer justicia?
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