Prof. Stelios P. Mertikas Profile

Prof. Stelios P. Mertikas

Director of Graduate Studies at Technical Univ of Crete

SPIE Involvement:

Editor | Author

Proceedings Article | 19 June 2015 Paper

Detection of small-scale rockfall incidents using their seismic signature

Achilleas Tripolitsiotis, Antonis Daskalakis, Stelios Mertikas, Dionysios Hristopulos, Zach Agioutantis, Panagiotis Partsinevelos

Proceedings Volume 9535, 953519 (2015) https://doi.org/10.1117/12.2192591

KEYWORDS: Algorithm development, Detection and tracking algorithms, Optical spheres, Signal detection, Sensors, Environmental sensing, Optical inspection, Imaging systems, Remote sensing, Computing systems

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Proceedings Article | 12 August 2014 Paper

Rockfall detection along road networks using close range photogrammetry

Panagiotis Partsinevelos, Stelios Mertikas, Zacharias Agioutantis, Vassilis Tsioukas, Achilleas Tripolitsiotis, Panagiotis Zervos

Proceedings Volume 9229, 92291M (2014) https://doi.org/10.1117/12.2068787

KEYWORDS: Photogrammetry, Cameras, Roads, Sensors, Image processing, Vegetation, Geodesy, Safety, Lenses, Laser scanners

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Proceedings Article | 5 August 2013 Paper

Land movement monitoring at the Mavropigi lignite mine using spaceborne D-InSAR

Eirini Papadaki, Achilleas Tripolitsiotis, Chrysanthos Steiakakis, Zacharias Agioutantis, Stelios Mertikas, Panagiotis Partsinevelos, Pavlos Schilizzi

Proceedings Volume 8795, 87951A (2013) https://doi.org/10.1117/12.2027100

KEYWORDS: Mining, Interferometry, Synthetic aperture radar, Global Positioning System, Satellites, Radar, Image processing, Visualization, Geodesy, Satellite imaging

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Proceedings Article | 8 October 2011 Paper

Preparatory works for the altimeter calibration of the Sentinel-3 mission using the dedicated calibration site in Crete and Gavdos

Stelios Mertikas, A. Daskalakis, Ef. Koutroulis, A. Tripolitsiotis, P. Partsinevelos

Proceedings Volume 8175, 81750U (2011) https://doi.org/10.1117/12.899133

KEYWORDS: Satellites, Calibration, Transponders, Prototyping, Microwave radiation, Antennas, Geodesy, Radar, Sensors, Satellite communications

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Proceedings Article | 18 October 2010 Paper

Absolute calibration of Jason satellite radar altimeters at Gavdos Cal/Val facility using independent techniques

S. Mertikas, A. Daskalakis, V. Tserolas, W. Hausleitner, I. Tziavos, G. Vergos, V. Zervakis, X. Frantzis, A. Tripolitsiotis, P. Partsinevelos, D. Andrikopoulos

Proceedings Volume 7825, 78250C (2010) https://doi.org/10.1117/12.865991

KEYWORDS: Satellites, Calibration, Transponders, Global Positioning System, Radar, Receivers, Atmospheric modeling, Radiometry, Satellite navigation systems, Sensors

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Proceedings Article | 10 September 2009 Paper

Recent developments for the estimation of the altimeter bias for the Jason-1 and 2 satellites using the dedicated calibration site at Gavdos

Stelios Mertikas, Rigas Ioannides, X. Frantzis, A. Tripolitsiotis, P. Partsinevelos, I. Tziavos, G. Vergos, Walter Hausleitner

Proceedings Volume 7473, 74730C (2009) https://doi.org/10.1117/12.830403

KEYWORDS: Satellites, Calibration, Global Positioning System, Radar, Geodesy, Ground-based vicarious calibration of satellites, Software development, Troposphere, Sensors, Data modeling

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Proceedings Article | 13 October 2008 Paper

An alternative procedure for the estimation of the altimeter bias for the Jason-1 satellite using the dedicated calibration site at Gavdos

Stelios Mertikas, Ath. Papadopoulos, Erricos Pavlis

Proceedings Volume 7105, 71050H (2008) https://doi.org/10.1117/12.799495

KEYWORDS: Satellites, Calibration, Global Positioning System, Radar, Ground-based vicarious calibration of satellites, Transponders, Geodesy, Troposphere, Radiometry, Sensors

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Proceedings Article | 3 October 2006 Paper

Fusion of Quickbird satellite images for vegetation monitoring in previously mined reclaimed areas

E. Ieronimidi, Stelios Mertikas, D. Hristopoulos

Proceedings Volume 6366, 636611 (2006) https://doi.org/10.1117/12.683905

KEYWORDS: Image fusion, Wavelets, Multispectral imaging, Near infrared, Principal component analysis, Spatial resolution, Vegetation, Satellite imaging, Satellites, RGB color model

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The intent of this study is to remotely monitor the status of revegetation growth in a reclaimed, previously mined region on the island of Milos, Greece. Quickbird multispectral (spatial resolution 2.4m×2.4m) and panchromatic (spatial resolution 0.6m×0.6m) images have been fused to obtain an optimal combination of the initial spatial and spectral resolution. The Blue (450nm-520nm), Green (520nm-600nm) and Near Infrared (760nm-900nm) bands of the multispectral image have been used for vegetation monitoring. Different fusion methods, like the Principal Component Analysis, the Intensity-Hue-Saturation transform and the Wavelet The goal of this study is to remotely monitor the status of re-vegetation growth in a reclaimed, previously mined region on the island of Milos, Greece. Quickbird multispectral (spatial resolution 2.4m×2.4m) and panchromatic (spatial resolution 0.6m×0.6m) images have been fused to obtain an optimal combination of the initial spatial and spectral resolution. The Blue (450nm-520nm), Green (520nm-600nm) and Near Infrared (760nm-900nm) bands of the multispectral image have been used for vegetation monitoring. Different fusion methods, like the Principal Component Analysis, the Intensity-Hue-Saturation transform and the Wavelet Analysis have been applied to Quickbird images. Both statistical (correlation coefficient, accuracy measures, etc.) and subjective (i.e., visual) measures have been used to evaluate the produced fused images. The degree to which each of the fused images retains the spectral and spatial features of the initial images has been thus estimated. Based on statistical measures, it has been found that the Additive Wavelet Principal Component "A Trous" and the Additive Wavelet Intensity Mallat methods effectively preserve most of the spectral information of the original multispectral image. On the other hand, the "A Trous" and Intensity-Hue-Saturation fusion techniques retain most of the spatial information of the panchromatic image. Additionally, the IHS transform offers a compromise between the spectral and spatial content of the fused image. Since the spectral content in the NIR band is of primary importance for monitoring re-vegetation growth, the Additive Wavelet Mallat and the IHS transforms are the most suitable choices.

Proceedings Article | 16 November 2004 Paper

Permanent facility for calibration/validation of satellite altimetry: GAVDOS

Stelios Mertikas, Erricos Pavlis, Ilias Tziavos, Eftichios Koutroulis, Kirill Palamartchouk, Thanassis Papadopoulos, George Vergos

Proceedings Volume 5569, (2004) https://doi.org/10.1117/12.566361

KEYWORDS: Satellites, Global Positioning System, Calibration, Data modeling, Transponders, Sensors, Solar energy, Geodesy, Satellite laser ranging, Environmental sensing

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Proceedings Article | 14 February 2003 Paper

A European radar altimeter calibration and sea-level monitoring site for Jason-1 and ENVISAT at the island of Gavdos, Crete, Greece

Stelios Mertikas, Erricos Pavlis, Panos Drakopoulos, Kirill Palamartchouk

Proceedings Volume 4880, (2003) https://doi.org/10.1117/12.462517

KEYWORDS: Calibration, Global Positioning System, Satellites, Transponders, Radar, Sensors, Geodesy, Meteorological satellites, Environmental sensing, Distance measurement

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Showing 5 of 10 publications

SPIE Conference Volume | 29 October 2018

Remote Sensing of the Ocean, Sea Ice, Coastal Waters, and Large Water Regions 2018

SPIE Conference Volume | 21 November 2017

Remote Sensing of the Ocean, Sea Ice, Coastal Waters, and Large Water Regions 2017

SPIE Conference Volume | 28 November 2016

Remote Sensing of the Ocean, Sea Ice, Coastal Waters, and Large Water Regions 2016

SPIE Conference Volume | 13 November 2015

Remote Sensing of the Ocean, Sea Ice, Coastal Waters, and Large Water Regions 2015

SPIE Conference Volume | 12 November 2014

Remote Sensing of the Ocean, Sea Ice, Coastal Waters, and Large Water Regions 2014

Showing 5 of 13 publications

Conference Committee Involvement (18)

Remote Sensing of the Ocean, Sea Ice, Coastal Waters, and Large Water Regions 2023

4 September 2023 | Amsterdam, Netherlands

Remote Sensing of the Ocean, Sea Ice, Coastal Waters, and Large Water Regions 2022

6 September 2022 | Berlin, Germany

Remote Sensing of the Ocean, Sea Ice, Coastal Waters, and Large Water Regions 2021

13 September 2021 | Online Only, Spain

Remote Sensing of the Ocean, Sea Ice, Coastal Waters, and Large Water Regions 2020

22 September 2020 | Online Only, United Kingdom

Remote Sensing of the Ocean, Sea Ice, Coastal Waters, and Large Water Regions 2019

9 September 2019 | Strasbourg, France

Remote Sensing of the Ocean, Sea Ice, Coastal Waters, and Large Water Regions 2018

10 September 2018 | Berlin, Germany

Remote Sensing of the Ocean, Sea Ice, Coastal Waters, and Large Water Regions 2017

11 September 2017 | Warsaw, Poland

Remote Sensing of the Ocean, Sea Ice, Coastal Waters, and Large Water Regions 2016

26 September 2016 | Edinburgh, United Kingdom

Remote Sensing of the Ocean, Sea Ice, Coastal Waters, and Large Water Regions 2015

23 September 2015 | Toulouse, France

Remote Sensing of the Ocean, Sea Ice, Coastal Waters, and Large Water Regions 2014

24 September 2014 | Amsterdam, Netherlands

Remote Sensing of the Ocean, Sea Ice, Coastal Waters, and Large Water Regions 2013

24 September 2013 | Dresden, Germany

Remote Sensing of the Ocean, Sea Ice, Coastal Waters, and Large Water Regions 2012

26 September 2012 | Edinburgh, United Kingdom

Remote Sensing of the Ocean, Sea Ice, Coastal Waters, and Large Water Regions 2011

21 September 2011 | Prague, Czech Republic

Remote Sensing of the Ocean, Sea Ice, and Large Water Regions 2010

22 September 2010 | Toulouse, France

Remote Sensing of the Ocean, Sea Ice, and Large Water Regions 2009

31 August 2009 | Berlin, Germany

Remote Sensing of the Ocean, Sea Ice, and Large Water Regions 2008

15 September 2008 | Cardiff, Wales, United Kingdom

Remote Sensing of the Ocean, Sea Ice, and Large Water Regions 2007

17 September 2007 | Florence, Italy

Remote Sensing of the Ocean, Sea Ice, and Large Water Regions 2006

11 September 2006 | Stockholm, Sweden

Showing 5 of 18 Conference Committees

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