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Browsing by Autor "Natalia Valderrama"

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    Job-VS: Joint Brain-Vessel Segmentation in TOF-MRA Images
    (2023) Natalia Valderrama; Ioannis Pitsiorlas; Luisa Vargas; Pablo Arbeláez; María A. Zuluaga
    We propose the first joint-task learning framework for brain and vessel segmentation (JoB-VS) from Time-of-Flight Magnetic Resonance images. Unlike state-of-the-art vessel segmentation methods, our approach avoids the pre-processing step of implementing a model to extract the brain from the volumetric input data. Skipping this additional step makes our method an end-to-end vessel segmentation framework. JoB-VS uses a lattice architecture that favors the segmentation of structures of different scales (e.g., the brain and vessels). Its segmentation head allows the simultaneous prediction of the brain and vessel mask. Moreover, we generate data augmentation with adversarial examples, which our results demonstrate to enhance the performance. JoB-VS achieves 70.03% mean AP and 69.09% F1-score in the OASIS-3 dataset and is capable of generalizing the segmentation in the IXI dataset. These results show the adequacy of JoB-VS for the challenging task of vessel segmentation in complete TOF-MRA images.
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    Produção de palmito de Euterpe oleacea Mart.(Arecaceae) no litoral Pacífico Colombiano
    (District University of Bogotá, 2011) Martha Isabel Vallejo; Natalia Valderrama; Rodrigo Bernal; Gloria Galeano; Gerardo Arteaga; Claudia Leal
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    PRODUCCIÓN DE PALMITO DE Euterpe oleracea Mart. (ARECACEAE) EN LA COSTA PACÍFICA COLOMBIANA: ESTADO ACTUAL Y PERSPECTIVAS
    (District University of Bogotá, 2011) Martha Isabel Vallejo; Natalia Valderrama; Rodrigo Bernal; Gloria Galeano; Gerardo Arteaga; Claudia Leal
    La revista Colombia Forestal publica manuscritos originales en temáticas del campo forestal y diversos aspectos de los recursos naturales y del medio ambiente, los cuales se discriminan en las categorías de artículo de investigación, de revisión, de reflexión y notas técnicas de acuerdo con lo estipulado por COLCIENCIAS para las publicaciones científicas. De acuerdo a la clasificación de áreas científicas de la Organización para la Cooperación y el Desarrollo Económico (OCDE), la revista Colombia Forestal pertenece al gran área de Ciencias Agrícolas(4), área de Agricultura, Silvicultura y Pesca(4A) y a la disciplina Forestal (4A02).

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