Dr. Lenny A. Romero Perez Profile

Dr. Lenny A. Romero Perez

at Univ Tecnologica de Bolivar

SPIE Involvement:

Author

Publications (23)

SPIE Journal Paper | 14 August 2024

Hybrid lighting enhances color accuracy in DLP-based 3D imaging

Erik Barrios, Jesus Pineda, Lenny Romero, María Millán, Andres Marrugo

OE, Vol. 63, Issue 08, 083105, (August 2024) https://doi.org/10.1117/12.10.1117/1.OE.63.8.083105

KEYWORDS: Digital Light Processing, Light sources and illumination, Skin, Light sources, Stereoscopy, Projection systems, Color tone, Color, Color difference, Optical engineering

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Proceedings Article | 7 June 2024 Presentation + Paper

Improving skin color accuracy in DLP-based 3D reconstruction

Erik Barrios, Jesus Pineda, Lenny Romero, María Millán, Andres Marrugo

Proceedings Volume 13038, 130380E (2024) https://doi.org/10.1117/12.3013523

KEYWORDS: Fringe analysis, Digital Light Processing, Light sources and illumination, Skin, Projection systems, Light sources, Color tone, Biomedical applications, 3D modeling, Stereoscopy, Digital image processing

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Proceedings Article | 16 June 2023 Presentation + Paper

Deep-learning enabled single-shot 3D feature detection in fringe projection profilometry

Juan Peña, Eberto Benjumea, Raúl Vargas, Lenny Romero, Alberto Patiño-Vanegas, Andres Marrugo

Proceedings Volume 12524, 1252404 (2023) https://doi.org/10.1117/12.2663955

KEYWORDS: Object detection, 3D image processing, Imaging systems, Cameras, 3D projection, Projection systems, Deep learning, Systems modeling

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Proceedings Article | 16 June 2023 Presentation + Paper

Challenges and opportunities in pixel-wise calibration methods for structured light systems

Raul Vargas, Fernando Quintero, Lenny Romero, Andres Marrugo

Proceedings Volume 12524, 125240G (2023) https://doi.org/10.1117/12.2664197

KEYWORDS: Calibration, Cameras, 3D modeling, Systems modeling, Imaging systems, Structured light, Projection systems, Visual process modeling, Performance modeling, Matrices

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Proceedings Article | 13 June 2023 Presentation + Paper

Deep neural networks for evaluation of specular microscopy images of the corneal endothelium with Fuchs' dystrophy

Sergio Sanchez, Kevin Mendoza, Fernando Quintero, Angélica Prada, Alejandro Tello, Virgilio Galvis, Lenny Romero, Andres Marrugo

Proceedings Volume 12527, 125270P (2023) https://doi.org/10.1117/12.2663895

KEYWORDS: Data modeling, Machine learning, Image quality, Microscopy, Image classification, Deep learning, Image segmentation

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Proceedings Article | 31 May 2022 Presentation + Paper

Toward high accuracy measurements in structured light systems

Raul Vargas, Lenny Romero, Song Zhang, Andres Marrugo

Proceedings Volume 12098, 120980A (2022) https://doi.org/10.1117/12.2618922

KEYWORDS: Calibration, 3D modeling, Systems modeling, Cameras, Imaging systems, Structured light, Projection systems, 3D metrology, Fringe analysis

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Proceedings Article | 2 September 2021 Presentation + Paper

Skin color correction via convolutional neural networks in 3D fringe projection profilometry

Erik Barrios, Jesus Pineda, Lenny Romero, María Millán, Andres Marrugo

Proceedings Volume 11804, 118041P (2021) https://doi.org/10.1117/12.2594331

KEYWORDS: Skin, Reflectivity, Convolutional neural networks, Digital Light Processing, Projection systems, Data modeling, Optical properties, Light sources and illumination, Image processing, Fringe analysis

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Proceedings Article | 1 August 2021 Presentation

Deep learning for robust segmentation of corneal endothelium images in the presence of cornea guttata

Juan Sierra, Jesús Pineda Castro, Jhacson Meza, Daniela Rueda, Rúben Berrospi, Alejandro Tello, Virgilio Galvis, Giovanni Volpe, Maria Millán García-Varela, Lenny Romero Perez, Andrés Marrugo

Proceedings Volume 11804, 118041F (2021) https://doi.org/10.1117/12.2594231

KEYWORDS: Image segmentation, Cornea, Microscopy, In vivo imaging, Transparency, Neural networks

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SPIE Journal Paper | 21 May 2021

Three-dimensional multimodal medical imaging system based on freehand ultrasound and structured light

Jhacson Meza, Sonia Contreras-Ortiz, Lenny Romero Perez, Andrés Marrugo

OE, Vol. 60, Issue 05, 054106, (May 2021) https://doi.org/10.1117/12.10.1117/1.OE.60.5.054106

KEYWORDS: Imaging systems, 3D image processing, Calibration, Cameras, Ultrasonography, Stereo vision systems, Medical imaging, 3D modeling, Projection systems, 3D acquisition

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Proceedings Article | 21 August 2020 Presentation + Paper

Hybrid calibration method for improving 3D measurement accuracy of structured light systems

Andres Marrugo, Raul Vargas, Song Zhang, Lenny Romero

Proceedings Volume 11490, 1149008 (2020) https://doi.org/10.1117/12.2567650

KEYWORDS: Calibration, 3D modeling, Cameras, Error analysis, Systems modeling, Imaging systems, Projection systems, 3D metrology, Structured light

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Proceedings Article | 19 August 2020 Presentation + Paper

Automated corneal endothelium image segmentation in the presence of cornea guttata via convolutional neural networks

Juan Sierra, Jesus Pineda, Eduardo Viteri, Daniela Rueda, Beatriz Tibaduiza, Rúben Berrospi, Alejandro Tello, Virgilio Galvis, Giovanni Volpe, María Millán, Lenny Romero, Andrés Marrugo

Proceedings Volume 11511, 115110H (2020) https://doi.org/10.1117/12.2569258

KEYWORDS: Image segmentation, Cornea, Microscopy, Convolution, Convolutional neural networks, Computer programming, In vivo imaging, Software development, Neural networks

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Proceedings Article | 19 May 2020 Presentation + Paper

Toward the generation of reproducible synthetic surface data in optical metrology

Jesus Pineda, Hernando Altamar-Mercado, Lenny Romero, Andrés Marrugo

Proceedings Volume 11397, 113970C (2020) https://doi.org/10.1117/12.2558730

KEYWORDS: Microscopy, Microscopes, Reflectivity, 3D modeling, Interferometry, Objectives, Optical metrology, Surface roughness, Sensors, Mirrors, Computer simulations

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Proceedings Article | 18 May 2020 Presentation + Paper

What is the best triangulation approach for a structured light system?

Jhacson Meza, Raul Vargas, Lenny Romero, Song Zhang, Andres Marrugo

Proceedings Volume 11397, 113970D (2020) https://doi.org/10.1117/12.2559119

KEYWORDS: Projection systems, Cameras, Distortion, Error analysis, Imaging systems, Calibration, Structured light, 3D modeling, Fringe analysis, Matrices

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Proceedings Article | 3 January 2020 Paper

A low-cost multi-modal medical imaging system with fringe projection profilometry and 3D freehand ultrasound

Jhacson Meza, Pedro Simarra, Sara Contreras-Ojeda, Lenny Romero, Sonia Contreras-Ortiz, Fernando Arámbula Cosío, Andrés Marrugo

Proceedings Volume 11330, 1133004 (2020) https://doi.org/10.1117/12.2542712

KEYWORDS: Ultrasonography, Medical imaging, Imaging systems, 3D image processing, Calibration, Image registration, Infrared imaging, Infrared search and track, Infrared radiation, Breast

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Proceedings Article | 21 June 2019 Paper

A flexible and simplified calibration procedure for fringe projection profilometry

Raúl Vargas, Andrés Marrugo, Jesus Pineda, Lenny Romero

Proceedings Volume 11057, 110571R (2019) https://doi.org/10.1117/12.2527607

KEYWORDS: Calibration, 3D modeling, Cameras, Projection systems, 3D metrology, Imaging systems, Stereo vision systems, Fringe analysis, 3D image reconstruction

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Proceedings Article | 13 May 2019 Paper

Wide-field 3D imaging with an LED pattern projector for accurate skin feature measurements via Fourier transform profilometry

Andrés Marrugo, Lenny Romero, Jaime Meneses

Proceedings Volume 10991, 1099102 (2019) https://doi.org/10.1117/12.2518649

KEYWORDS: Cameras, Skin, Projection systems, 3D modeling, Imaging systems, Fourier transforms, Calibration, Light emitting diodes, Fringe analysis, Dermatology, Structured light, 3D metrology, 3D imaging metrology, Dimensional metrology

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Proceedings Article | 13 May 2019 Paper

Toward an automatic 3D measurement of skin wheals from skin prick tests

Andrés Marrugo, Lenny Romero, Jesus Pineda, Raúl Vargas, Hernando Altamar-Mercado, Javier Marrugo, Jaime Meneses

Proceedings Volume 10991, 1099104 (2019) https://doi.org/10.1117/12.2519034

KEYWORDS: Skin, Calibration, Cameras, 3D modeling, 3D metrology, Imaging systems, Fringe analysis, 3D image processing, Dermatology, Profilometers, 3D acquisition, 3D imaging metrology, Medical diagnostic instruments

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Proceedings Article | 28 January 2015 Paper

Programmable diffractive optical elements for extending the depth of focus in ophthalmic optics

Lenny Romero, María Millán, Zbigniew Jaroszewicz, Andrzej Kołodziejczyk

Proceedings Volume 9287, 92871E (2015) https://doi.org/10.1117/12.2073866

KEYWORDS: Optical components, Image segmentation, Diffractive optical elements, Eye, Modulation transfer functions, Image quality, Chemical elements, Axicons, Point spread functions, Spatial light modulators

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SPIE Journal Paper | 18 March 2014

Programmable diffractive lens for ophthalmic application

Maria Millan, Elisabet Perez-Cabre, Lenny Romero, Natalia Ramirez

OE, Vol. 53, Issue 06, 061709, (March 2014) https://doi.org/10.1117/12.10.1117/1.OE.53.6.061709

KEYWORDS: Eye, Spatial light modulators, Monochromatic aberrations, Modulation transfer functions, Image sensors, CCD image sensors, Liquid crystal on silicon, Visualization, Image quality, Modulators

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Proceedings Article | 18 November 2013 Paper

Ophthalmic compensation of visual ametropia based on a programmable diffractive lens

Maria Millán, Elisabet Pérez-Cabré, Lenny Romero, Natalia Ramírez

Proceedings Volume 8785, 8785CO (2013) https://doi.org/10.1117/12.2025472

KEYWORDS: Eye, Spatial light modulators, CCD image sensors, Liquid crystal on silicon, Image sensors, Visualization, Phase shift keying, Modulation transfer functions, Phase modulation, Geometrical optics

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Proceedings Article | 5 May 2012 Paper

Extended focal depth imaging using single and double peacock eye phase diffractive elements

Lenny Romero, María Millán, Zbigniew Jaroszewicz, Andrzej Kolodziejczyk

Proceedings Volume 8429, 84291R (2012) https://doi.org/10.1117/12.923028

KEYWORDS: Image segmentation, Optical components, Eye, Point spread functions, Spatial light modulators, Diffractive optical elements, Modulation transfer functions, Optical design, Multiplexing, Image quality

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SPIE Journal Paper | 27 April 2012 Open Access

Double peacock eye optical element for extended focal depth imaging with ophthalmic applications

Lenny Romero, María Millán, Zbigniew Jaroszewicz, Andrzej Kolodziejczyk

JBO, Vol. 17, Issue 04, 046013, (April 2012) https://doi.org/10.1117/12.10.1117/1.JBO.17.4.046013

KEYWORDS: Eye, Image segmentation, Optical components, Spatial light modulators, Lenses, Multiplexing, Phase shift keying, Liquid crystal on silicon, Point spread functions, Modulation transfer functions

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Proceedings Article | 14 May 2010 Paper

Multiorder varifocal moiré zone plates

Z. Jaroszewicz, A. Kołodziejczyk, M. Millan, L. Romero Perez, I. Golub

Proceedings Volume 7717, 77171D (2010) https://doi.org/10.1117/12.854117

KEYWORDS: Zone plates, Chemical elements, Manufacturing, Spherical lenses, Optical components, Superposition, Chromatic aberrations, Optical design, Diffractive optical elements, Diffraction

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Showing 5 of 23 publications

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