Alexandros Andre Chaaraoui

Alexandros Andre Chaaraoui
Google Inc. | Google · Machine Intelligence

PhD in Computer Science

About

26
Publications
9,109
Reads
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996
Citations
Additional affiliations
February 2014 - June 2015
University of Alicante
Position
  • PostDoc Position
October 2010 - present
University of Alicante
Position
  • PhD Student

Publications

Publications (26)
Data
Machine learning method based on a bag of key poses model and sequence alignment. This method handles multiclass classification of data with sequential or temporal relation. Any type of feature expressed as an array of double values can be used. This data has to be acquired in an ordered fashion, so that a sequence of features with a meaningful ord...
Article
Full-text available
Vision-based human action recognition allows to detect and understand meaningful human motion. This makes it possible to perform advanced human-computer interaction, among other applications. In dynamic environments, adaptive methods are required to support changing scenario characteristics. Specifically, in human–robot interaction, smooth interact...
Thesis
Full-text available
Human behaviour analysis is being of great interest in the field of artificial intelligence. Specifically, human action recognition deals with the lowest level of semantic interpretation of meaningful human behaviours, as walking, sitting or falling. In the field of ambient-assisted living, the recognition of such actions at home can support severa...
Article
Vision-based human action recognition is an essential part of human behavior analysis, which is currently in great demand due to its wide area of possible applications. In this paper, an optimization of a human action recognition method based on a cooperative coevolutionary algorithm is proposed. By means of coevolution, three different populations...
Article
Full-text available
Privacy in image and video data has become an important subject since cameras are being installed in an increasing number of public and private spaces. Specifically, in assisted living, intelligent monitoring based on computer vision can allow one to provide risk detection and support services that increase people's autonomy at home. In the present...
Article
Recent advances in computer vision technologies have made possible the development of intelligent monitoring systems for video surveillance and ambient-assisted living. By using this technology, these systems are able to automatically interpret visual data from the environment and perform tasks that would have been unthinkable years ago. These achi...
Conference Paper
Full-text available
In a near future, a greater number of individuals in long-term care will live alone. New solutions are needed in order to provide them support and increase their autonomy at home. Intelligent monitoring systems based on computer vision may provide a solution. However, pri-vacy related issues must be solved beforehand. In this paper, we propose a le...
Article
Full-text available
This paper presents a novel silhouette-based feature for vision-based human action recognition, which relies on the contour of the silhouette and a radial scheme. Its low-dimensionality and ease of extraction result in an outstanding proficiency for real-time scenarios. This feature is used in a learning algorithm that by means of model fusion of m...
Conference Paper
Full-text available
Ambient assisted living technologies and services make it possible to help elderly and impaired people and increase their personal autonomy. Specifically, vision-based approaches enable the recognition of human behaviour, which in turn allows to build valuable services upon. However, a main constraint is that these have to be able to work on-line a...
Article
Full-text available
This paper aims to determine which is the best human action recognition method based on features extracted from RGB-D devices, such as the Microsoft Kinect. A review of all the papers that make reference to MSR Action3D, the most used dataset that includes depth information acquired from a RGB-D device, has been performed. We found that the validat...
Article
Full-text available
Due to progress and demographic change, society is facing a crucial challenge related to increased life expectancy and a higher number of people in situations of dependency. As a consequence, there exists a significant demand for support systems for personal autonomy. This article outlines the vision@home project, whose goal is to extend independen...
Conference Paper
Full-text available
Since the Microsoft Kinect has been released, the usage of marker-less body pose estimation has been enormously eased. Based on 3D skeletal pose information, complex human gestures and actions can be recognised in real time. However, due to errors in tracking or occlusions, the obtained information can be noisy. Since the RGB-D data is available, t...
Conference Paper
Full-text available
Social progress and demographic changes favor increased life expec-tancy and the number of people in situations of dependency. As a consequence, the demand for support systems for personal autonomy is increasing. This arti-cle outlines the vision @ home project, whose goal is the development of vi-sion-based services for monitoring and recognition...
Article
In this paper, a human action recognition method is presented in which pose representation is based on the contour points of the human silhouette and actions are learned by making use of sequences of multi-view key poses. Our contribution is twofold. Firstly, our approach achieves state-of-the-art success rates without compromising the speed of the...
Article
Interest in RGB-D devices is increasing due to their low price and the wide range of possible applications that come along. These devices provide a marker-less body pose estimation by means of skeletal data consisting of 3D positions of body joints. These can be further used for pose, gesture or action recognition. In this work, an evolutionary alg...
Conference Paper
Full-text available
Human action recognition constitutes a core component of advanced human behavior analysis. The detection and recog-nition of basic human motion enables to analyze and under-stand human activities, and to react proactively providing different kinds of services from human-computer interaction to health care assistance. In this paper, a feature-level...
Article
Full-text available
RESUMEN (ABSTRACT) El reto de implantar los nuevos grados exige un continuado esfuerzo de coordinación de las asignaturas de cada curso y de los diferentes cursos entres sí. En este trabajo se presentan los resultados de los diferentes proyectos que se han realizado para coordinar las asignaturas de los tres primeros cursos del Grado en Ingeniería...
Article
Full-text available
When novice researchers in the fields of Computer Vision and Human Behaviour Analysis/Understanding (HBA/HBU) initiate new projects applied to Ambient-Assisted Living (AAL) scenarios, a lack of specific, publicly available frameworks, tools and datasets is perceived. This work is an attempt to fill that particular gap, by presenting different field...
Conference Paper
Full-text available
The growth in interest in RGB-D devices (e.g. Microsoft Kinect or ASUS Xtion Pro) is based on their low price, as well as the wide range of possible applications. These devices can provide skeletal data consisting of 3D position, as well as orientation data, which can be further used for pose or action recognition. Data for 15 or 20 joints can be r...
Conference Paper
Full-text available
This paper presents a novel multi-view human action recognition approach based on a bag-of-key-poses. In the case of multi-view scenarios, it is especially difficult to perform accurate action recognition that still runs at an admissible recognition speed. The presented method aims to fill this gap by combining a silhouette-based pose representatio...
Article
Full-text available
Human Behaviour Analysis (HBA) is more and more being of interest for computer vision and artificial intelligence researchers. Its main application areas, like Video Surveillance and Ambient-Assisted Living (AAL), have been in great demand in recent years. This paper provides a review on HBA for AAL and ageing in place purposes focusing specially o...
Conference Paper
Full-text available
Este artículo describe la especificación y el diseño de una interfaz de control domótico basada en un sistema de detección de postura por visión. Mediante las imágenes captadas por una cámara cenital se detecta la dirección y el sentido de la postura del usuario empleando varias técnicas de inteligencia artificial basadas en análisis de componentes...

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