Results 11 to 20 of about 145 (109)

Analysis of the Cluster Prominence Feature for Detecting Calcifications in Mammograms. [PDF]

J Healthc Eng, 2018
In mammograms, a calcification is represented as small but brilliant white region of the digital image. Earlier detection of malignant calcifications in patients provides high expectation of surviving to this disease. Nevertheless, white regions are difficult to see by visual inspection because a mammogram is a gray‐scale image of the breast.
Cruz-Bernal A, Flores-Barranco MM, Almanza-Ojeda DL, Ledesma S, Ibarra-Manzano MA.   +4 more
europepmc   +2 more sources

Improving EEG-Based Motor Imagery Classification for Real-Time Applications Using the QSA Method. [PDF]

Comput Intell Neurosci, 2017
We present an improvement to the quaternion‐based signal analysis (QSA) technique to extract electroencephalography (EEG) signal features with a view to developing real‐time applications, particularly in motor imagery (IM) cognitive processes. The proposed methodology (iQSA, improved QSA) extracts features such as the average, variance, homogeneity ...
Batres-Mendoza P, Ibarra-Manzano MA, Guerra-Hernandez EI, Almanza-Ojeda DL, Montoro-Sanjose CR, Romero-Troncoso RJ, Rostro-Gonzalez H.   +6 more
europepmc   +2 more sources

A Perceptive Approach to Digital Image Watermarking Using a Brightness Model and the Hermite Transform

Mathematical Problems in Engineering, Volume 2018, Issue 1, 2018., 2018
This work presents a watermarking technique in digital images using a brightness model and the Hermite Transform (HT). The HT is an image representation model that incorporates important properties of the Human Vision System (HVS), such as the analysis of local orientation, and the model of Gaussian derivatives of early vision.
Boris Escalante-Ramírez, S. L. Gomez-Coronel, Khaled Loukhaoukha   +2 more
wiley   +1 more source

Multiple‐Fault Detection Methodology Based on Vibration and Current Analysis Applied to Bearings in Induction Motors and Gearboxes on the Kinematic Chain

Shock and Vibration, Volume 2016, Issue 1, 2016., 2016
Gearboxes and induction motors are important components in industrial applications and their monitoring condition is critical in the industrial sector so as to reduce costs and maintenance downtimes. There are several techniques associated with the fault diagnosis in rotating machinery; however, vibration and stator currents analysis are commonly used ...
Juan Jose Saucedo-Dorantes, Miguel Delgado-Prieto, Juan Antonio Ortega-Redondo, Roque Alfredo Osornio-Rios, Rene de Jesus Romero-Troncoso, Konstantinos N. Gyftakis   +5 more
wiley   +1 more source

Vibration Suppression for Improving the Estimation of Kinematic Parameters on Industrial Robots

Shock and Vibration, Volume 2016, Issue 1, 2016., 2016
Vibration is a phenomenon that is present on every industrial system such as CNC machines and industrial robots. Moreover, sensors used to estimate angular position of a joint in an industrial robot are severely affected by vibrations and lead to wrong estimations.
David Alejandro Elvira-Ortiz, Rene de Jesus Romero-Troncoso, Arturo Yosimar Jaen-Cuellar, Luis Morales-Velazquez, Roque Alfredo Osornio-Rios, Konstantinos N. Gyftakis   +5 more
wiley   +1 more source

Desempeño de un Sistema de Comunicación Digital Empleando Codificación de Línea

Ingenierías USBMed, 2018
En el área de las telecomunicaciones es importante analizar el impacto del tipo de codificación de canal sobre el sistema de comunicación digital, estos sistemas emplean técnicas de procesamiento digital de señales que incorporan elementos hardware ...
Oscar Iván Velásquez Andrade, Javier Alexis Urresty Sánchez, Victor Fabián Miramá Pérez, Claudia Milena Hernández Bonilla, Pablo Emilio Jojoa Gómez   +4 more
doaj   +1 more source

Comparación de Métodos de Reducción de Dimensión Basados en Análisis por Localidades

TecnoLógicas, 2010
In this paper, a comparison of methods for nonlinear dimensionality reduction is proposed in order to determine which technique preserves better the local properties, without losing the overall structure of the original data.
Juliana Valencia-Aguirre, Genaro Daza-Santacoloma, Carlos D. Acosta, Germán Castellanos-Domínguez   +3 more
doaj  

ENTORNO VIRTUAL EDUCATIVO: PROCESAMIENTO DIGITAL DE SEÑALES

Tecnología Educativa, 2018
En la Facultad de Ingeniería en Telecomunicaciones, Biomédica e Informática de la Universidad de Oriente en  Santiago de Cuba, para el incremento y perfeccionamiento del conocimiento de los estudiantes en la asignatura  Procesamiento Digital de Señales,
Yadisbel Martinez Cañete, Sergio Daniel Ortiz Cano, Miriam Roll Hechavarría   +2 more
doaj   +2 more sources

Selección de Características 2D en Representaciones Tiempo Frecuencia para la Detección de Soplos Cardíacos

TecnoLógicas, 2011
En el presente trabajo se propone una metodología para la reducción de dimensión en representaciones tiempo frecuencia (TFRs) enfocada a la clasificación de bioseñales no estacionarias, que trata directamente su cantidad de datos irrelevantes y ...
Juan D. Martínez-Vargas, Luis D. Avendaño-Valencia, Germán Castellanos-Domínguez   +2 more
doaj  

Desarrollo de un monitor de laboratorio de la variabilidad de la frecuencia cardíaca

Revista Sextante, 2019
El presente artículo está enfocado en el desarrollo de un monitor de laboratorio de la variabilidad de la frecuencia cardíaca (VFC), el cual se constituye en una herramienta no invasiva y cuantitativa, que permite monitorear la modulación del sistema ...
María Cristina Barrios Díaz, Jean Carlos Gilede Garzón, Gisella Yolanda Borja Roncallo, Jean Carlos Gilede Garzón, Jose Alberto Ledesma León   +4 more
doaj   +1 more source