Dr. Marcelo Trivi Profile

Dr. Marcelo Trivi

Vice-Director of Ctr. at Centro de Investigaciones Opticas

SPIE Involvement:

Author

Publications (45)

Proceedings Article | 26 June 2017 Paper

Box fractal dimension in speckle images

Héctor Rabal, Eduardo Grumel, Nelly Cap, Leandro Buffarini, Marcelo Trivi

Proceedings Volume 10333, 103331H (2017) https://doi.org/10.1117/12.2269656

KEYWORDS: Fractal analysis, Speckle, Speckle pattern, Ultrasonography, Biology, Medicine, Geology, Satellite imaging, Earth observing sensors, Satellites

Read Abstract +

SPIE Journal Paper | 7 June 2016 Open Access

Characterization of spatial–temporal patterns in dynamic speckle sequences using principal component analysis

José Manuel López-Alonso, Eduardo Grumel, Nelly Lucía Cap, Marcelo Trivi, Héctor Rabal, Javier Alda

OE, Vol. 55, Issue 12, 121705, (June 2016) https://doi.org/10.1117/12.10.1117/1.OE.55.12.121705

KEYWORDS: Principal component analysis, Speckle, Speckle pattern, Optical engineering, Biological research, Statistical analysis, Image filtering, Signal to noise ratio, Lanthanum, Speckle analysis

Read Abstract +

DOWNLOAD PAPER

Proceedings Article | 9 September 2015 Paper

Characterization of dynamic speckle sequences using principal component analysis and image descriptors

José M. López-Alonso, Eduardo Grumel, Nelly Cap, Marcelo Trivi, Héctor Rabal, Javier Alda

Proceedings Volume 9598, 95980Q (2015) https://doi.org/10.1117/12.2187978

KEYWORDS: Principal component analysis, Speckle, Image analysis, Video, Signal to noise ratio, Biological research, Image processing, Statistical analysis, Lanthanum, Speckle analysis

Read Abstract +

Proceedings Article | 24 August 2015 Paper

Evaluation of Activity Images in Dynamic Speckle: In Search of Objective Estimators

Marcos Avendaño Montecinos, Victor Mora Canales, Nelly Cap, Eduardo Grumel, Hector Rabal, Marcelo Trivi, Erik Baradit

Proceedings Volume 9660, 96601Z (2015) https://doi.org/10.1117/12.2202301

KEYWORDS: Speckle, Image processing, Lanthanum, Lamps, Reflectivity, Adhesives, Medicine, Biology, Agriculture, Image segmentation

Read Abstract +

Proceedings Article | 17 July 2014 Open Access

An introductory approach to the concept of spatial coherence

H. Rabal, N. Cap, E. Grumel, M. Trivi

Proceedings Volume 9289, 92890J (2014) https://doi.org/10.1117/12.2070781

KEYWORDS: Spatial coherence, Visibility, Lanthanum, Light sources, Fourier transforms, Glasses, Light, Coherence (optics), Superposition, Education and training

Read Abstract +

DOWNLOAD PAPER

Proceedings Article | 18 November 2013 Paper

Estimation of hygroscopic power of electrotechnical materials by dynamic speckle technique

G. Bertolini, C. Cabello, R. Arizaga, M. Trivi, Gustavo Barbera

Proceedings Volume 8785, 87857G (2013) https://doi.org/10.1117/12.2026377

KEYWORDS: Speckle, Adsorption, Speckle pattern, Lanthanum, Biological research, Aluminum, Photomicroscopy, Chemical elements, Silicon, Statistical analysis

Read Abstract +

SPIE Journal Paper | 7 May 2012 Open Access

Discrimination of motile bacteria from filamentous fungi using dynamic speckle

Silvia Murialdo, Jorge Gonzalez, Lucia Passoni, Marcelo Nicolás Guzman, Gonzalo Sendra, Hector Rabal, Marcelo Trivi

JBO, Vol. 17, Issue 5, 056011, (May 2012) https://doi.org/10.1117/12.10.1117/1.JBO.17.5.056011

KEYWORDS: Bacteria, Fungi, Speckle, Image processing, Microorganisms, Image filtering, Electronic filtering, RGB color model, Bandpass filters, Optical filters

Read Abstract +

DOWNLOAD PAPER

Proceedings Article | 3 November 2011 Paper

Low cost optoelectronic system for paint drying monitoring

Ezequiel Rubinsztain, Ariel Lutenberg, Marcelo Trivi, Fernando Perez Quintián

Proceedings Volume 8011, 80118U (2011) https://doi.org/10.1117/12.902719

KEYWORDS: Speckle, Speckle pattern, Optoelectronics, CCD image sensors, Correlation function, Charge-coupled devices, Semiconductor lasers, Microcontrollers, Latex, Lanthanum

Read Abstract +

Proceedings Article | 3 November 2011 Paper

Determination of coagulation time of human blood by biospeckle technique

Mario Milver Patiño Velasco, Jairo Alfonso Vásquez Lopez, Carlos Augusto Andrade Erazo, Ricardo Arizaga, Héctor Rabal, Marcelo Trivi

Proceedings Volume 8011, 80118S (2011) https://doi.org/10.1117/12.902185

KEYWORDS: Blood, Speckle, Speckle pattern, Statistical analysis, Blood vessels, Biological research, Tissues, Video, Plasma, Proteins

Read Abstract +

Proceedings Article | 3 November 2011 Paper

Gastric mucosa analysis using speckle patterns: a medical diagnosis alternative

Carlos Augusto Andrade Eraso, Mario Milver Patiño Velasco, Jairo Alfonso Vásquez Lopez, Jaury Leon Tellez, Luis Eduardo Bravo, Hector Rabal, Marcelo Trivi

Proceedings Volume 8011, 80118I (2011) https://doi.org/10.1117/12.901830

KEYWORDS: Speckle pattern, Biopsy, Speckle, Tissues, Medical diagnostics, Diagnostics, Biological research, Biomedical optics, Statistical analysis, Endoscopy

Read Abstract +

Proceedings Article | 14 September 2010 Paper

Biospeckle descriptors: a performance comparison

G. Hernán Sendra, Ana Dai Pra, Lucia Passoni, Ricardo Arizaga, Hector Rabal, Marcelo Trivi

Proceedings Volume 7387, 73871K (2010) https://doi.org/10.1117/12.870682

KEYWORDS: Diffusers, Speckle pattern, Speckle, Fuzzy logic, Lanthanum, Computer simulations, Image processing, Nonlinear response, Statistical analysis, Optical signal processing

Read Abstract +

Proceedings Article | 14 September 2010 Paper

Dynamic laser speckle: decision models with computational intelligence techniques

Marcelo Guzman, Gustavo Meschino, Ana Dai Pra, Marcelo Trivi, Lucía Passoni, Héctor Rabal

Proceedings Volume 7387, 738717 (2010) https://doi.org/10.1117/12.870688

KEYWORDS: Speckle pattern, Speckle, Neural networks, Fuzzy logic, Genetic algorithms, Image processing, Visualization, Brain mapping, Ions, Error analysis

Read Abstract +

SPIE Journal Paper | 1 November 2009 Open Access

Analysis of bacterial chemotactic response using dynamic laser speckle

Silvia Murialdo, Gonzalo Sendra, Lucia Passoni, Ricardo Arizaga, Jorge Gonzalez, Héctor Rabal, Marcelo Trivi

JBO, Vol. 14, Issue 06, 064015, (November 2009) https://doi.org/10.1117/12.10.1117/1.3262608

KEYWORDS: Speckle, Bacteria, Biological research, Image processing, Lanthanum, Signal processing, Microorganisms, Cameras, Contamination, Optical coherence tomography

Read Abstract +

DOWNLOAD PAPER

Proceedings Article | 17 June 2009 Paper

Analysis of low activity in dynamic speckle patterns

M. Guzman, G. Sendra, H. Rabal, R. Arizaga, M. Trivi

Proceedings Volume 7389, 73892P (2009) https://doi.org/10.1117/12.827394

KEYWORDS: Speckle pattern, Diffusers, Speckle, Computer simulations, Lanthanum, Biological research, Numerical simulations, Image processing, Optical metrology, Electronic filtering

Read Abstract +

SPIE Journal Paper | 1 May 2008

Dynamic speckle algorithms comparison using receiver operating characteristic

C. Ortiz, Gonzalo Sendra, Hector Rabal, Ricardo Arizaga, Marcelo Trivi

OE, Vol. 47, Issue 05, 057005, (May 2008) https://doi.org/10.1117/12.10.1117/1.2920429

KEYWORDS: Speckle, Image processing, Electronic filtering, Speckle pattern, Optical engineering, Receivers, Lanthanum, CCD cameras, Tissues, Diagnostics

Read Abstract +

SPIE Journal Paper | 1 May 2007

Characterization of dynamic speckles by the difference histogram method

Adriana Mavilio Nunez, Margarita Fernandez Limia, Mercedes Lazo, Hector Rabal, Ricardo Arizaga, Marcelo Trivi

OE, Vol. 46, Issue 05, 057005, (May 2007) https://doi.org/10.1117/12.10.1117/1.2736306

KEYWORDS: Speckle, Speckle pattern, Image analysis, Optical engineering, Statistical analysis, Humidity, Wavelet transforms, Image processing, Correlation function, Image classification

Read Abstract +

Proceedings Article | 15 September 2006 Paper

Activity speckle measurements comparison using R.O.C. (receiver operating characteristic) methods

Héctor Rabal, Christian Ortiz, Marcelo Trivi, Ricardo Arizaga

Proceedings Volume 6341, 63412B (2006) https://doi.org/10.1117/12.695497

KEYWORDS: Speckle, Image processing, Speckle pattern, Receivers, Diagnostics, Statistical methods, Biological research, Tissues, Statistical analysis, Digital signal processing

Read Abstract +

Proceedings Article | 15 September 2006 Paper

Dynamic speckle texture processing using averaged dimensions

Héctor Rabal, Ricardo Arizaga, Nelly Cap, Marcelo Trivi, Adriana Mavilio Nuñez, Margarita Fernandez Limia

Proceedings Volume 6341, 63412G (2006) https://doi.org/10.1117/12.695503

KEYWORDS: Speckle, Image segmentation, Speckle pattern, Lanthanum, Computer simulations, Image classification, Laser scattering, Light scattering, Tissues, Natural surfaces

Read Abstract +

Proceedings Article | 15 September 2006 Paper

Application of a laser speckle method for determining chemotactic responses of Pseudomonas aeruginosa toward attractants

Silvia Murialdo, Lucía Passoni, Gonzalo Sendra, Héctor Rabal, Ricardo Arizaga, Nelly Cap, Marcelo Trivi

Proceedings Volume 6341, 63412D (2006) https://doi.org/10.1117/12.695500

KEYWORDS: Speckle, Wavelets, Speckle pattern, Pathogens, Bacteria, Signal processing, Electronic filtering, Image filtering, Lanthanum, Tissues

Read Abstract +

Proceedings Article | 15 September 2006 Paper

A numerical model for dynamic speckle and its application to the analysis of temporally evolving processes

Héctor Rabal, Marcelo Trivi, Ricardo Arizaga, Alejandro Federico, Gustavo Galizzi, Guillermo Kaufmann

Proceedings Volume 6341, 63411G (2006) https://doi.org/10.1117/12.695369

KEYWORDS: Speckle, Speckle pattern, Scattering, Image segmentation, Image processing, Statistical analysis, Laser scattering, Light scattering, Computer simulations, Reflectivity

Read Abstract +

Proceedings Article | 27 August 2005 Paper

Biological specimens analysis using dynamic speckle spectral bands

G. Sendra, J. Salerno, C. Weber, H. Rabal, R. Arizaga, M. Trivi

Proceedings Volume 5858, 585811 (2005) https://doi.org/10.1117/12.612606

KEYWORDS: Speckle, Biological research, Linear filtering, Image filtering, Electronic filtering, Lanthanum, Optical filters, Speckle pattern, Blood circulation, Speckle analysis

Read Abstract +

Proceedings Article | 21 October 2004 Paper

Temporal evolution of speckle in foams

A. Martinez, C. Ortiz, Hector Rabal, Ricardo Arizaga, Marcelo Trivi

Proceedings Volume 5622, (2004) https://doi.org/10.1117/12.591715

KEYWORDS: Foam, Speckle, Speckle pattern, CCD cameras, Lanthanum, Laser scattering, Dynamic light scattering, Light scattering, Corrosion, Blood circulation

Read Abstract +

Proceedings Article | 21 October 2004 Paper

Speckle contrast dithering simulations

G. Sendra, Hector Rabal, Marcelo Trivi, Ricardo Arizaga

Proceedings Volume 5622, (2004) https://doi.org/10.1117/12.591754

KEYWORDS: Speckle, Image processing, Speckle pattern, Computer simulations, Image resolution, Quantization, CCD cameras, Lanthanum, Cameras, Imaging systems

Read Abstract +

Proceedings Article | 19 November 2003 Paper

Numerical model for dynamic speckle: preliminary results

Marcelo Trivi, Hector Rabal, Ricardo Arizaga, Nelly Cap, E. Grumel

Proceedings Volume 4829, (2003) https://doi.org/10.1117/12.527084

KEYWORDS: Scattering, Speckle, Light scattering, Speckle pattern, Laser scattering, Lutetium, Lanthanum, Tissues, Natural surfaces, Refractive index

Read Abstract +

Proceedings Article | 19 November 2003 Paper

Soap film analysis by speckle interferometer

Myrian Tebaldi, Luciano Angel, Marcelo Trivi, Nestor Bolognini

Proceedings Volume 4829, (2003) https://doi.org/10.1117/12.524882

KEYWORDS: Speckle, Interferometers, Diffusers, Speckle pattern, Visibility, Lanthanum, UV optics, Interferometry, Fringe analysis, Spatial frequencies

Read Abstract +

SPIE Journal Paper | 1 February 2002

Display of local activity using dynamical speckle patterns

Ricardo Arizaga, Nelly Cap, Hector Rabal, Marcelo Trivi

OE, Vol. 41, Issue 02, (February 2002) https://doi.org/10.1117/12.10.1117/1.1428739

KEYWORDS: Speckle, Speckle pattern, Diffusers, Image segmentation, Image processing, Optical engineering, Tissues, Statistical analysis, Corrosion, Blood circulation

Proceedings Article | 23 October 2001 Paper

Speckle index in dynamic processes: application to drying of paint

Marcelo Trivi, Hector Rabal, Nelly Cap, Ricardo Arizaga

Proceedings Volume 4398, (2001) https://doi.org/10.1117/12.445550

KEYWORDS: Speckle, Speckle pattern, Laser scattering, Light scattering, Tissues, Natural surfaces, Lanthanum, Statistical analysis, Frame grabbers, Aerosols

Read Abstract +