Dr. Adrianos Retalis Profile

Dr. Adrianos Retalis

Senior Researcher at National Observatory of Athens

SPIE Involvement:

Author

Publications (20)

Proceedings Article | 12 August 2016 Paper

Increasing spatial resolution of CHIRPS rainfall datasets for Cyprus with artificial neural networks

Filippos Tymvios, Silas Michaelides, Adrianos Retalis, Dimitrios Katsanos, Jos Lelieveld

Proceedings Volume 9688, 96880G (2016) https://doi.org/10.1117/12.2242820

KEYWORDS: Artificial neural networks, Spatial resolution, Data modeling, Neurons, Satellites, Climatology, Meteorology, Earth observing sensors, Image resolution, Satellite imaging

Read Abstract +

Proceedings Article | 16 October 2015 Paper

Intercomparison between MODIS 3km aerosol optical depth product and ground PM10 measurements over Athens, Greece

Adrianos Retalis, Dimitris Paronis, Dimitris Katsanos

Proceedings Volume 9640, 96400S (2015) https://doi.org/10.1117/12.2194517

KEYWORDS: Aerosols, MODIS, Phase modulation, Atmospheric modeling, Data modeling, Satellites, Atmospheric particles, Performance modeling, Detection and tracking algorithms, Statistical analysis

Read Abstract +

Proceedings Article | 12 August 2014 Paper

Monitoring water quality parameters for Case II waters in Cyprus using satellite data

Christiana Papoutsa, Adrianos Retalis, Leonidas Toulios, Diofantos Hadjimitsis

Proceedings Volume 9229, 922911 (2014) https://doi.org/10.1117/12.2069788

KEYWORDS: Water, Landsat, Satellites, Algorithm development, Remote sensing, Data modeling, Reflectivity, Phosphorus, Atmospheric modeling, Earth observing sensors

Read Abstract +

Proceedings Article | 5 August 2013 Paper

Image based analysis for assessing coastal water quality temporal and spatial variations in Limassol Harbor area in Cyprus

Christiana Papoutsa, Adrianos Retalis, Michael Scoullos, Maria Loizidou, Marina Argyrou, Diofantos Hadjimitsis

Proceedings Volume 8795, 879528 (2013) https://doi.org/10.1117/12.2029098

KEYWORDS: Water, Reflectivity, Image quality, Image analysis, Remote sensing, Atmospheric corrections, Earth observing sensors, Image processing, Satellites, Landsat

Read Abstract +

Proceedings Article | 5 August 2013 Paper

Using ERS-2 and ALOS PALSAR images for soil moisture and inundation mapping in Cyprus

Dimitrios Alexakis, Athos Agapiou, Kyriacos Themistocleous, Adrianos Retalis, Diofantos Hadjimitsis

Proceedings Volume 8795, 87950Z (2013) https://doi.org/10.1117/12.2028337

KEYWORDS: Soil science, Backscatter, Floods, Radar, Image filtering, Synthetic aperture radar, Vegetation, Principal component analysis, Image fusion, Natural disasters

Read Abstract +

Proceedings Article | 5 August 2013 Paper

A satellite-based approach for land cover/use changes in Acheron River catchment (Greece)

Aikaterini Kostara, Adrianos Retalis, Eva Papastergiadou

Proceedings Volume 8795, 879519 (2013) https://doi.org/10.1117/12.2029074

KEYWORDS: Vegetation, Agriculture, Satellites, Earth observing sensors, Remote sensing, Satellite imaging, Environmental sensing, Ecosystems, Landsat, Reflectivity

Read Abstract +

Proceedings Article | 5 August 2013 Paper

Development of an educational e-material on remote sensing environmental applications: a case study for schools

Theodora Nikitopoulou, Adrianos Retalis

Proceedings Volume 8795, 879503 (2013) https://doi.org/10.1117/12.2028125

KEYWORDS: Remote sensing, Environmental sensing, Internet, Satellites, Satellite imaging, Data storage, Earth observing sensors, Physical sciences, Printed circuit board testing, Software development

Read Abstract +

SPIE Journal Paper | 7 November 2012

Monitoring urban land cover using satellite remote sensing techniques and field spectroradiometric measurements: case study of "Yialias" catchment area in Cyprus

Dimitrios Alexakis, Diofantos Hadjimitsis, Athos Agapiou, Kyriacos Themistocleous, Adrianos Retalis

JARS, Vol. 6, Issue 01, 063603, (November 2012) https://doi.org/10.1117/12.10.1117/1.JRS.6.063603

KEYWORDS: Image classification, Satellites, Remote sensing, Image segmentation, Satellite imaging, Principal component analysis, Earth observing sensors, Vegetation, Fractal analysis, Volume rendering

Read Abstract +

Proceedings Article | 1 November 2012 Paper

The development of air quality indices through image-retrieved AOT and PM10 measurements in Limassol Cyprus

Kyriacos Themistocleous, Diofantos Hadjimitsis, Adrianos Retalis, Nektarios Chrysoulakis

Proceedings Volume 8534, 85340B (2012) https://doi.org/10.1117/12.974701

KEYWORDS: Geographic information systems, Satellites, Atmospheric corrections, Satellite imaging, Air contamination, Algorithm development, Earth observing sensors, Aerosols, Atmospheric particles, Sun

Read Abstract +

Proceedings Article | 1 November 2012 Paper

The use of volcanic beach sand as a pseudo-invariant target for atmospheric correction using Landsat images

Kyriacos Themistocleous, Diofantos Hadjimitsis, Adrianos Retalis, Nektarios Chrysoulakis

Proceedings Volume 8534, 85340L (2012) https://doi.org/10.1117/12.974697

KEYWORDS: Reflectivity, Atmospheric corrections, Landsat, Earth observing sensors, Satellites, Calibration, Satellite imaging, Scalable video coding, Atmospheric optics, Remote sensing

Read Abstract +

Proceedings Article | 1 November 2012 Paper

The comparison of the darkest pixel and empirical line atmospheric correction methods to retrieve aerosol optical thickness using the radiative transfer equations

Kyriacos Themistocleous, Diofantos Hadjimitsis, Adrianos Retalis, Nektarios Chrysoulakis

Proceedings Volume 8534, 85340K (2012) https://doi.org/10.1117/12.974688

KEYWORDS: Atmospheric corrections, Reflectivity, Satellites, Satellite imaging, Earth observing sensors, Aerosols, Electroluminescence, Detection and tracking algorithms, Atmospheric optics, Landsat

Read Abstract +

Proceedings Article | 19 October 2012 Paper

Flood mapping of Yialias River catchment area in Cyprus using ALOS PALSAR radar images

Dimitrios Alexakis, Diofantos Hadjimitsis, Athos Agapiou, Kyriacos Themistocleous, Adrianos Retalis, Silas Michaelides, Stelios Pashiardis, F. Tymvios

Proceedings Volume 8531, 85310S (2012) https://doi.org/10.1117/12.974581

KEYWORDS: Backscatter, Floods, Soil science, Radar, Image filtering, Satellites, Synthetic aperture radar, Data acquisition, Atmospheric corrections, Meteorology

Read Abstract +

SPIE Journal Paper | 3 July 2012

Development of a new image based atmospheric correction algorithm for aerosol optical thickness retrieval using the darkest pixel method

Kyriacos Themistocleous, Diofantos Hadjimitsis, Adrianos Retalis, Nektarios Chrysoulakis

JARS, Vol. 6, Issue 01, 063538, (July 2012) https://doi.org/10.1117/12.10.1117/1.JRS.6.063538

KEYWORDS: Atmospheric corrections, Satellites, Earth observing sensors, Reflectivity, Sun, Photometry, Satellite imaging, Algorithm development, Aerosols, Detection and tracking algorithms

Read Abstract +

Proceedings Article | 4 October 2011 Paper

Monitoring urban land cover with the use of satellite remote sensing techniques as a means of flood risk assessment in Cyprus

Dimitris Alexakis, Diofantos Hadjimitsis, Athos Agapiou, Kyriacos Themistocleous, Adrianos Retalis

Proceedings Volume 8176, 81761Z (2011) https://doi.org/10.1117/12.898185

KEYWORDS: Floods, Image classification, Satellites, Satellite imaging, Earth observing sensors, Remote sensing, Fractal analysis, Vegetation, Principal component analysis, Image processing

Read Abstract +

The increase of flood inundation occuring in different regions all over the world have enhanced the need for effective flood risk management. As floods frequency is increasing with a steady rate due to ever increasing human activities on physical floodplains there is a respectively increasing of financial destructive impact of floods. A flood can be determined as a mass of water that produces runoff on land that is not normally covered by water. However, earth observation techniques such as satellite remote sensing can contribute toward a more efficient flood risk mapping according to EU Directives of 2007/60. This study strives to highlight the need of digital mapping of urban sprawl in a catchment area in Cyprus and the assessment of its contribution to flood risk. The Yialias river (Nicosia, Cyprus) was selected as case study where devastating flash floods events took place at 2003 and 2009. In order to search the diachronic land cover regime of the study area multi-temporal satellite imagery was processed and analyzed (e.g Landsat TMETM+, Aster). The land cover regime was examined in detail by using sophisticated post-processing classification algorithms such as Maximum Likelihood, Parallelepiped Algorithm, Minimum Distance, Spectral Angle and Isodata. Texture features were calculated using the Grey Level Co-Occurence Matrix. In addition three classification techniques were compared : multispectral classification, texture based classification and a combination of both. The classification products were compared and evaluated for their accuracy. Moreover, a knowledge-rule method is proposed based on spectral, texture and shape features in order to create efficient land use and land cover maps of the study area. Morphometric parameters such as stream frequency, drainage density and elongation ratio were calculated in order to extract the basic watershed characteristics. In terms of the impacts of land use/cover on flooding, GIS and Fragstats tool were used to detect identifying trends, both visually and statistically, resulting from land use changes in a flood prone area such as Yialias by the use of spatial metrics. The results indicated that there is a considerable increase of urban areas cover during the period of the last 30 years. All these denoted that one of the main driving force of the increasing flood risk in catchment areas in Cyprus is generally associated to human activities.

Proceedings Article | 25 October 2010 Paper

Smart monitoring of water quality in Asprokremmos Dam in Paphos, Cyprus using satellite remote sensing and wireless sensor platform

Christiana Papoutsa, Diofantos Hadjimitsis, Kyriacos Themistocleous, Skevi Perdikou, Adrianos Retalis, Leonidas Toulios

Proceedings Volume 7831, 78310Q (2010) https://doi.org/10.1117/12.864824

KEYWORDS: Satellites, Landsat, Sensors, Reflectivity, Satellite imaging, Earth observing sensors, Remote sensing, Image analysis, Atmospheric corrections, Algorithm development

Read Abstract +

Proceedings Article | 12 October 2010 Paper

Accuracy assessment of atmospheric correction algorithms using sun-photometers (AERONET), lidar system, and in situ spectroradiometers

Kyriacos Themistocleous, G. Diofantos Hadjimitsis, Adrianos Retalis, Nektarios Chrysoulakis

Proceedings Volume 7827, 78270E (2010) https://doi.org/10.1117/12.864825

KEYWORDS: Atmospheric corrections, Accuracy assessment, LIDAR, Reflectivity, Satellites, Detection and tracking algorithms, Earth observing sensors, Landsat, Calibration, Remote sensing

Read Abstract +

Proceedings Article | 12 October 2010 Paper

Spectro-radiometric measurements of non-variant targets intended for the removal of atmospheric effects from satellite images: the case study of Lemesos area in Cyprus

G. Diofantos Hadjimitsis, Kyriacos Themistocleous, Vassilis Trigkas, Alexandros Matsas, Retalis Adrianos, Chrysoulakis Nektarios

Proceedings Volume 7827, 78270D (2010) https://doi.org/10.1117/12.864806

KEYWORDS: Reflectivity, Satellite imaging, Satellites, Earth observing sensors, Atmospheric corrections, Calibration, Landsat, Target acquisition, Laser scanners, Sensors

Read Abstract +

Proceedings Article | 13 February 2004 Paper

Satellite remote sensing and GIS for sustainable development in Skiathos Island, Greece

Diofantos Hadjimitsis, Adrianos Retalis, Christopher Clayton

Proceedings Volume 5239, (2004) https://doi.org/10.1117/12.511522

KEYWORDS: Remote sensing, Satellites, Vegetation, Earth observing sensors, Geographic information systems, Satellite imaging, Near infrared, Landsat, Reflectivity, Environmental sensing

Read Abstract +

Proceedings Article | 13 February 2004 Paper

On the darkest pixel atmospheric correction algorithm: a revised procedure applied over satellite remotely sensed images intended for environmental applications

Diofantos Hadjimitsis, Christopher Clayton, Adrianos Retalis

Proceedings Volume 5239, (2004) https://doi.org/10.1117/12.511520

KEYWORDS: Atmospheric corrections, Satellites, Reflectivity, Satellite imaging, Earth observing sensors, Landsat, Sensors, Remote sensing, Environmental sensing, Atmospheric optics

Read Abstract +

Proceedings Article | 14 March 2003 Paper

Exploring the need for identifying suitable pseudo-invariant targets for applying atmospheric correction in multitemporal studies using satellite remotely sensed imagery

Diofantos Hadjimitsis, Christopher Clayton, Paraskevi Perdikou, A. Retalis

Proceedings Volume 4886, (2003) https://doi.org/10.1117/12.463317

KEYWORDS: Atmospheric corrections, Reflectivity, Earth observing sensors, Satellites, Satellite imaging, Landsat, Atmospheric modeling, Atmospheric optics, Aerosols, Atmospheric sensing

Read Abstract +

Showing 5 of 20 publications

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Keywords/Phrases

Search In:

Publication Years