Zobrazeno 1 - 10
of 134
pro vyhledávání: '"Héctor Rabal"'
Autor:
Marcelo Trivi, Héctor Rabal, Eduardo Emilio Grumel, Leandro Buffarini, Myrian Tebaldi, Nelly Cap
Publikováno v:
Frontiers in Optics / Laser Science.
We present adaptive algorithms for speckle dynamic images with light of different wavelengths. We carried out an experiment to test this approach, namely reading hidden drawing under paper and papyrus.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::45b5d0f54d3d9e85a66623b1211fd1b2
https://doi.org/10.1364/fio.2020.jw6b.26
https://doi.org/10.1364/fio.2020.jw6b.26
Publikováno v:
Frontiers in Optics / Laser Science.
We propose the generalization of the Laguerre Gauss Transform by using elliptical kernels in vortices metrology. This permits the generation of a family of very close vortices used to measure strain in cardiac ultrasound images.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::12afe730c486ba2c057decd0efee41ab
https://doi.org/10.1364/fio.2020.jth4b.31
https://doi.org/10.1364/fio.2020.jth4b.31
Publikováno v:
Optics and Lasers in Engineering. 106:61-67
The paint-coating is part of several industrial processes, including the automotive industry, architectural coatings, machinery and appliances. These paint-coatings must comply with high quality standards, for this reason evaluation techniques from p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cc4da4edc17670a979266d08d54f7669
https://doi.org/10.1016/j.optlaseng.2018.02.013
https://doi.org/10.1016/j.optlaseng.2018.02.013
Publikováno v:
Optics and Lasers in Engineering. 106:47-55
We propose a simple generalization of the box fractal dimension in images by considering the curve obtained from its value as a function of the binarization threshold. This curve can be used to partially describe ordinary images, textures, static and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a88cdb7c22f46aa28e005d8add831352
https://doi.org/10.1016/j.optlaseng.2018.02.006
https://doi.org/10.1016/j.optlaseng.2018.02.006
Publikováno v:
Optics Communications. 389:212-223
We report a new theoretical and experimental study on hologravures, as holographic computer-generated laser-engravings. A geometric theory of images based on the general principles of light ray behaviour is shown. The models used are also applicable
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fdccfcff6a053741d82eda239be85efe
https://doi.org/10.1016/j.optcom.2016.11.018
https://doi.org/10.1016/j.optcom.2016.11.018
Autor:
Nelly Cap, Eduardo Emilio Grumel, E. Baradit Allendes, Héctor Rabal, Marcelo Trivi, L. Buffarini, M. Avendaño Montecinos
We propose a generalized Box Fractal algorithm to segment activity speckle images. The time history of the intensity value at every pixel of the frames is taken as a time series. The plot of this time series is then considered an image in a plane, an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a63655a36bb3f7972cd34353972402c3
https://www.sciencedirect.com/science/article/abs/pii/S0143816619301757
https://www.sciencedirect.com/science/article/abs/pii/S0143816619301757
Autor:
Adel Elmaghraby, Astrid Lorena Villamizar Amado, Héctor Rabal, Eduardo Emilio Grumel, Myrian Tebaldi, Daniel Sierra-Sosa
Publikováno v:
Optics and Lasers in Engineering. 136:106317
We present an approach based on optical vortex density to characterize a dynamic process. The proposal is tested in real experiments involving the drying of paint as case study. In this case, speckle patterns are generated by coherent light scattered
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::089b07285d05260a95982e78495d4e63
https://doi.org/10.1016/j.optlaseng.2020.106317
https://doi.org/10.1016/j.optlaseng.2020.106317
Autor:
Héctor Rabal, Leandro Buffarini, Nelly Cap, Marcelo Trivi, Paul T. Finger, Eduardo Emilio Grumel
Publikováno v:
Optics and Lasers in Engineering. 129:106084
Herein we present a generalized algorithm for processing activity images. Existing algorithms are applicable only to particular cases, and a new, broader approach is therefore proposed here that is based on a set of tuneable filters for images, using
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5613c9838987b8163df8be3028f64030
https://doi.org/10.1016/j.optlaseng.2020.106084
https://doi.org/10.1016/j.optlaseng.2020.106084
Publikováno v:
SEDICI (UNLP)
Universidad Nacional de La Plata
instacron:UNLP
CONICET Digital (CONICET)
Consejo Nacional de Investigaciones Científicas y Técnicas
instacron:CONICET
Universidad Nacional de La Plata
instacron:UNLP
CONICET Digital (CONICET)
Consejo Nacional de Investigaciones Científicas y Técnicas
instacron:CONICET
The concept of spatial coherence is usually hard to comprehend the first time that it is studied. We propose here a fully intuitive geometric description that does not contain mathematical difficulties, and permits one to understand how a Young’s f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e349bb10ceb917c0f7048c848b487c95
https://doi.org/10.7149/opa.48.2.63
https://doi.org/10.7149/opa.48.2.63
Publikováno v:
Optical Methods for Inspection, Characterization, and Imaging of Biomaterials III.
In this paper, we propose a generalization of the box fractal dimension in images by considering the curve obtained from its value as a function of the binarization threshold. This curve can be used to describe speckle patterns. We show some examples
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d1ee1ad6770ef2fd1a153f0390a429ba
https://doi.org/10.1117/12.2269656
https://doi.org/10.1117/12.2269656