Humberto Loaiza

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Infrared thermography is a nondestructive evaluation technique in which the specimen surface is thermally stimulated to produce a temperature difference between " sound " (free of defects) areas and eventual defective regions. It is well known that the thermographic methods based on the thermal contrast are strongly affected by non-uniform heating at the(More)
In this paper, a technique based on a new model from finite differences discretization of Fourier heat propagation in 3D, is presented in order to be applied on a sequence of infrared images to enhance contrast and automatically detect and characterize flaws in composite slabs. The performance of this technique is evaluated using artificial thermal(More)
Resumen—En este artículo se presentan los resultados obtenidos, al emplear algoritmos genéticos para la combinación de algunas técnicas y clasificadores utilizados en el reconocimiento de rostros con imágenes infrarrojas. Se muestra que bajo el esquema de combinación propuesto, el sistema presenta un mayor desempeño que las técnicas individuales y abre un(More)
con ultrasonido. En el presente artículo se propone entonces un sistema de procesamiento de señales ultrasónicas captadas a través de una estructura de 2 Transmisores y 2 Receptores, de tal manera que extrayendo diferentes características del espacio temporal, de los espectros de Fourier y de los coeficientes Wavelet, eligiendo las más adecuadas mediante(More)
This paper presents the design, implementation and results of a thermal image processing tool, which allows the capture, pre–processing and processing of thermal images through a graphical script interface, then, generate reports and store results in a data base. Each stage (capture, pre-process, process and reports) was designed and implemented keeping in(More)