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Quevedo E.,Oceanic Platform of the Canary Islands | Quevedo E.,University of Las Palmas de Gran Canaria | De La Cruz J.,University of Las Palmas de Gran Canaria | Callico G.M.,University of Las Palmas de Gran Canaria | And 2 more authors.
Digest of Technical Papers - IEEE International Conference on Consumer Electronics | Year: 2014

Super-Resolution (SR) covers a set of techniques which objective is to improve the resolution of a video sequence or a single frame. In this scope, a fusion SR algorithm has been used, where High-Resolution (HR) images are constructed from several observed Low-Resolution (LR) images. In this paper, this approach is combined with a Multi-Camera (MC) system to take advantage at the same time from the spatial and temporal correlations between the recorded sequences, in order to improve the quality of the super-resolved HR sequence. © 2014 IEEE.


Quevedo E.,Oceanic Platform of the Canary Islands | De La Cruz J.,University of Las Palmas de Gran Canaria | Callico G.M.,University of Las Palmas de Gran Canaria | Tobajas F.,University of Las Palmas de Gran Canaria | Sarmiento R.,University of Las Palmas de Gran Canaria
IEEE Transactions on Consumer Electronics | Year: 2014

Super-Resolution (SR) covers a set of techniques whose objective is to improve the resolution of a video sequence or a single frame. In this scope, a fusion SR algorithm has been used, where High-Resolution (HR) images are constructed from several observed Low-Resolution (LR) images. In this paper, this approach is combined with a Multi-Camera (MC) system to take advantage of the spatial and temporal correlations between the recorded sequences, in order to improve the quality of the super-resolved HR sequence. The results show that the proposed combination outperforms the quality of typical SR applications, such as consumer electronics, surveillance video or remote sensing. © 1975-2011 IEEE.


Quevedo E.,Oceanic Platform of the Canary Islands | De La Cruz J.,University of Las Palmas de Gran Canaria | Sanchez L.,University of Las Palmas de Gran Canaria | Callico G.M.,University of Las Palmas de Gran Canaria | Tobajas F.,University of Las Palmas de Gran Canaria
IEEE Transactions on Consumer Electronics | Year: 2015

Super-Resolution (SR) consists in processing an image or a set of images in order to enhance the resolution of a video sequence or a single frame. In this paper, fusion SR techniques are considered, where High-Resolution (HR) images are constructed from several observed Low-Resolution (LR) images, thereby increasing the high-frequency components and removing the degradations caused by the recording process of LR imaging acquisition devices. This paper follows a strategy combining the selection of the most appropriate frames and adaptive sized Macro-Blocks (MBs) together with a Multi-Camera (MC) system. This proposal optimizes the spatial and temporal correlations between the recorded sequences, and minimizes the appearance of annoying artifacts at the same time, improving the quality of the super-resolved HR sequence and reducing the computational cost by more than a factor of two. This type of image enhancement systems has many applications in Consumer Electronics appliances related to imaging. More specifically, many camera suppliers are incorporating Super-Resolution in their high-end products. © 1975-2011 IEEE.


Quevedo E.,Oceanic Platform of the Canary Islands | Quevedo E.,University of Las Palmas de Gran Canaria | De La Cruz J.,University of Las Palmas de Gran Canaria | Sanchez L.,University of Las Palmas de Gran Canaria | And 2 more authors.
2015 IEEE International Conference on Consumer Electronics, ICCE 2015 | Year: 2015

Variable Size Block-Matching Super-Resolution covers a set of techniques which objective is to improve the resolution of a video sequence or a single frame considering variable sized Macro-Blocks. In this paper, this approach is combined with a Multi-Camera system to take advantage from the spatial and temporal correlations between frames. © 2015 IEEE.


Gelado-Caballero M.D.,University of Las Palmas de Gran Canaria | Lopez-Garcia P.,University of Las Palmas de Gran Canaria | Prieto S.,University of Las Palmas de Gran Canaria | Patey M.D.,University of Las Palmas de Gran Canaria | And 2 more authors.
Journal of Geophysical Research: Atmospheres | Year: 2012

There are very few sets of long-term measurements of aerosol concentrations over the North Atlantic Ocean, yet such data is invaluable in quantifying atmospheric dust inputs to this ocean region. We present an 8-year record of total suspended particles (TSP) collected at three stations on Gran Canaria Island, Spain (Taliarte at sea level, Tafira 269 m above sea level (a.s.l.) and Pico de la Gorra 1930 m a.s.l.). Using wet and dry deposition measurements, the mean dust flux was calculated at 42.3 mg m-2 d-1. Air mass back trajectories (HYSPLIT, NOAA) suggested that the Sahara desert is the major source of African dust (dominant during 32-50% of days), while the Sahel desert was the major source only 2-10% of the time (maximum in summer). Elemental composition ratios of African samples indicate that, despite the homogeneity of the dust in collected samples, some signatures of the bedrocks can still be detected. Differences were found for the Sahel, Central Sahara and North of Sahara regions in Ti/Al, Mg/Al and Ca/Al ratios, respectively. Elements often associated with pollution (Pb, Cd, Ni, Zn) appeared to share a common origin, while Cu may have a predominantly local source, as suggested by a decrease in the enrichment factor (EF) of Cu during dust events. The inter-annual variability of dust concentrations is investigated in this work. During winter, African dust concentration measurements at the Pico de la Gorra station were found to correlate with the North Atlantic Oscillation (NAO) index. Copyright 2012 by the American Geophysical Union.

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