Now showing items 1-16 of 16

    • A low noise stenography method for medical images with QR encoding of patient information 

      Patiño-Vanegas A.; Contreras-Ortiz S.H.; Martinez-Santos J.C. (SPIE, 2017)
      This paper proposes an approach to facilitate the process of individualization of patients from their medical images, without compromising the inherent confidentiality of medical data. The identification of a patient from ...
    • A small vocabulary database of ultrasound image sequences of vocal tract dynamics 

      Castillo M.; Rubio F.; Porras D.; Contreras-Ortiz S.H.; Sepúlveda A. (Institute of Electrical and Electronics Engineers Inc., 2019)
      This paper presents a new database consisting of concurrent articulatory and acoustic speech data. The articulatory data correspond to ultrasound videos of the vocal tract dynamics, which allow the visualization of the ...
    • Acquisition and Analysis of Cognitive Evoked Potentials using an Emotiv Headset for ADHD Evaluation in Children 

      Mercado-Aguirre I.M.; Gutiérrez-Ruiz K.; Contreras-Ortiz S.H. (Institute of Electrical and Electronics Engineers Inc., 2019)
      Attention-deficit/hyperactivity disorder (ADHD) is a neurological condition that affects the quality of life of the patients. It can be diagnosed using a combination of psychological tests. In addition to that, the brain ...
    • Application of spatio-temporal filtering for atrial activity waveforms enhancement 

      Giraldo-Guzmán J.; Kotas M.; Piela M.; Castells F.; Łęski J.M.; Contreras-Ortiz S.H. (Association for Computing Machinery, 2019)
      In this paper, we propose to apply spatio-temporal filtering to atrial activity enhancement, prior to the detection of possible atrial arrhythmias. During normal sinus rhythm, the atrial activity is well synchronized with ...
    • Automated corneal endothelium image segmentation in the presence of cornea guttata via convolutional neural networks 

      Sierra, Juan S.; Pineda, Jesus; Viteri, Eduardo; Rueda, Daniela; Tibaduiza, Beatriz; Berrospi, Rúben D.; Tello, Alejandro; Galvis, Virgilio; Volpe, Giovanni; Millán, María S.; Romero, Lenny A.; Marrugo, Andrés G. (Cartagena de Indias, 2020-08)
      Automated cell counting in in-vivo specular microscopy images is challenging, especially in situations where single-cell segmentation methods fail due to pathological conditions. This work aims to obtain reliable cell ...
    • Automatic recognition of Colombian car license plates using convolutional neural networks and Chars74k database 

      Arroyo-Pérez, D E; Álvarez-Canchila, O I; Patiño-Saucedo, A; Rostro González, H; Patiño-Vanegas, A (Cartagena de Indias, 2020)
      A methodology for the automatic recognition of Colombian car license plates using convolutional neural networks is proposed. One of the biggest challenges when using onvolutional neural network is the demand for large ...
    • Background intensity removal in structured light three-dimensional reconstruction 

      Vargas R.; Pineda J.; Marrugo A.G.; Romero L.A. (Institute of Electrical and Electronics Engineers Inc., 2016)
      In Fourier Transform Profilometry, a filtering procedure is performed to separate the desired information (first order spectrum) from other unwanted contributions such as the background component (zero-order spectrum). ...
    • HoloEasy, a web application for computer generated holograms 

      Patiño-Vanegas A.; Diaz-Pacheco L.L.; Patiño-Vanegas J.J.; Martínez-Santos J.C. (Springer Verlag, 2018)
      If the appropriate phase and/or amplitude profile is placed on a Diffractive Optical Element (DOE) it can practically generate an image of an object (hologram) by diffraction of the light. The problem of generating computer ...
    • Implementation of an image based focusing algorithm for non-mydriatic retinal imaging 

      Marrugo A.G.; Millan M.S.; Abril H.C. (Institute of Electrical and Electronics Engineers Inc., 2014)
      Retinal photography is important for the assessment of eye diseases. The task of fine focusing the image is demanding and lack of focus is often the cause of suboptimal photographs. The advent of digital cameras has provided ...
    • LRemoving Dust Artifacts in Retinal Images via Dictionary Learning and Sparse-Based Inpainting 

      Barrios E.M.; Marrugo A.G.; Millán M.S. (Institute of Electrical and Electronics Engineers Inc., 2019)
      In the field of ophthalmology, retinal images are essential for the diagnosis of many diseases. These images are acquired with a device called the retinal camera. However, often small dust particles in the sensor produce ...
    • Male facial anthropometry and attractiveness 

      Soler C.; Kekäläinen J.; Núñez M.; Sancho M.; Núñez J.; Yaber I.; Gutiérrez R. (2012)
      The symmetry and masculinity of the face are often considered important elements of male facial attractiveness. However, facial preferences are rarely studied on natural faces. We studied the effect of these traits and ...
    • Multispectral tracking of phytoplankton in the Colombian Caribbean 

      Caicedo V.V.O.; Gómez A.P. (2004)
      In a quantitative research study, the concentration and circulation of group of micro-organisms "phytoplankton" have been found through the images of the ocean colour in the Colombian Caribbean Sea. These images have been ...
    • On the compensation of uneven illumination in retinal images for restoration by means of blind deconvolution 

      Marrugo A.G.; Vargas R.; Contreras S.; Millan M.S. (Institute of Electrical and Electronics Engineers Inc., 2016)
      Retinal eye fundus images are used for diagnostic purposes, but despite controlled conditions in acquisition they often suffer from uneven illumination and blur. In this work, we propose the use of multi-channel blind ...
    • Restoration of retinal images with space-variant blur 

      Marrugo A.G.; Millán M.S.; Šorel M.; Šroubek F. (2014)
      Retinal images are essential clinical resources for the diagnosis of retinopathy and many other ocular diseases. Because of improper acquisition conditions or inherent optical aberrations in the eye, the images are often ...
    • Speckle free optical watermarking based on pseudo-random phase encoding 

      Patino A.; Altamar H.; Martinez-Santos J.C. (Institute of Electrical and Electronics Engineers Inc., 2016)
      Watermarking is a process of embedding copiright information into an image to verify the ownership without any kind of corruption. In optical applications, the usage of diffusers is required to obtain a homogeneously ...
    • Ultrasound image enhancement: A review 

      Contreras Ortiz S.H.; Chiu T.; Fox M.D. (2012)
      Medical ultrasound imaging uses pulsed acoustic waves that are transmitted and received by a hand-held transducer. This is a mature technology that it is widely used around the world. Among its advantages are that it is ...

      Universidad Tecnológica de Bolívar - 2017 Institución de Educación Superior sujeta a inspección y vigilancia por el Ministerio de Educación Nacional. Resolución No 961 del 26 de octubre de 1970 a través de la cual la Gobernación de Bolívar otorga la Personería Jurídica a la Universidad Tecnológica de Bolívar.