Browsing by Contributor "Vilaseca Ricart, Meritxell"
Now showing items 1-20 of 39
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3D and multispectral imaging technology to aid in the diagnosis of skin cancer
(Universitat Politècnica de Catalunya, 2018-09-06)
Master thesis
Restricted access - author's decisionSkin cancer is one of the most frequent cancers in humans. The most important risk factor is UV radiation due to excessive sun. Melanoma is the most aggressive skin cancer and its incidence increases every year. Early ... -
Alteración de la calidad óptica ocular inducida por diferentes tipos de lesiones corneales
(Universitat Politècnica de Catalunya, 2014-07-01)
Master thesis
Open AccessPropósito: Evaluar los cambios en la calidad óptica ocular de manera objetiva en pacientes afectados por alteraciones en el epitelio corneal y con distrofias corneales. Diseño: Se trata de un estudio experimental, ... -
Application of a deformable mirror to a time-multiplexed fixed-viewpoint volumetric virtual reality system
(Universitat Politècnica de Catalunya, 2016-06-29)
Bachelor thesis
Open AccessConventional stereoscopic displays lack the ability to render correct focus cues owing to the vergence-accommodation conflict when looking at a display. To overcome this limitation, time-multiplexed techniques offer the ... -
¿Azul-negro o blanco-dorado?: bases psicofísicas y neurofisiológicas de un fenómeno visual viral
(Universitat Politècnica de Catalunya, 2016-06-02)
Bachelor thesis
Open AccessEn febrero del 2015 se viralizó en las redes sociales el fenómeno visual llamado The dress o Dressgate (el vestido), consistente en la fotografía ambigua de un vestido que, según el observador, era percibido como blanco-dorado ... -
Càlcul de la difusió intraocular a partir de la MTF per diferents dimensions de la imatge de doble pas
(Universitat Politècnica de Catalunya, 2014-06-30)
Bachelor thesis
Open AccessActualment existeix molta recerca pel què fa a l’estudi de la qualitat de la imatge retinal ja que, dels passos que intervenen en la visió, és l’únic de moment que podem millorar. Aquesta qualitat es veu afectada per les ... -
Calidad óptica ocular en ojos sometidos a cirugía refractiva y afecciones patológicas
(Universitat Politècnica de Catalunya, 2016-01-29)
Doctoral thesis
Open AccessThis dissertation deals with the evaluation of ocular optical quality in two types of patients. First, are patients who have undergone different surgical techniques of refractive surgery to correct different degrees of ... -
Cambios en los parámetros de calidad óptica ocular proporcionados por OQAS entre población sana y adulta
(Universitat Politècnica de Catalunya, 2011-01)
Master thesis
Open AccessEl desarrollo del instrumento de medida objetiva de calidad óptica OQAS (Optical Quality Analisys System)para el uso clínico, comercializado por VISIOMETRICS S.L., permite medir parámetros de calidad óptica (OQAS Values ... -
Clinical validation of a multispectral fundus camera. Visualization of drusen in the visible and near infrared
(Universitat Politècnica de Catalunya, 2019-06-17)
Master thesis
Restricted access - author's decisionActualment, les tècniques de diagnòstic estan sent millorades per diferents grups d’investigació amb l’objectiu de detectar precoçment patologies i, conseqüentment, obtenir efectivitat en els seus tractaments. Concretament, ... -
Comparison of an Adaptive Optics Vision Analyzer and a Hartmann-Shack Aberrometer for measuring ocular wave aberrations
(Universitat Politècnica de Catalunya, 2014-07-18)
Master thesis
Open Access[ANGLÈS] Measuring the ocular wavefront aberration function by means of the Hartmann-Shack technique is a common practice in visual optics. Nowadays several commercial devices provide this functionality; this is the reason ... -
Development of a new multispectral imaging system consisting of a liquid crystal tunable filter
(Universitat Politècnica de Catalunya, 2013-09-05)
Master thesis
Open Access[ANGLÈS] The aim of this study was to develop a new portable multispectral system basically composed of a monochrome digital camera, a liquid crystal tunable filter (LCTF) and a laptop. The system had a high spatial ... -
Development of a new spectral imaging system for the diagnosis of skin cancer
(Universitat Politècnica de Catalunya, 2017-11-06)
Doctoral thesis
Open AccessThe incidence of skin cancer in Europe, US and Australia has been rising rapidly. Skin cancer accounts for one in three cancers worldwide and a person has 1:25 chance to develop a melanoma, the most aggressive form. Visual ... -
Development of a Spectral Goniometric Imaging System based on LEDs
(Universitat Politècnica de Catalunya, 2015-05-20)
Master thesis
Open AccessThe use of goniochromatic pigments, which have a different luminous and color appearance depending on the illumination and observation angles, is rapidly increasing in a wide range of industries. To respond to the companies ... -
Development of living cells light scattering model from optical measurements
(Universitat Politècnica de Catalunya, 2018-09-06)
Master thesis
60 months embargoA simple light scattering model is developed to allow the extraction of the optical properties of arbitrary turbid media from the analysis of a single image. This model is applied to the analysis of genetically modified ... -
Diseño e implementación de un sistema multiespectral en el rango ultravioleta, visible e infrarrojo : aplicación al estudio y conservación de obras de arte
(Universitat Politècnica de Catalunya, 2014-03-25)
Doctoral thesis
Open AccessMultispectral systems have several applications and there are different possible configurations in which they can be implemented. Different characteristics make them useful, but the basic one is the access to spectral ... -
Evaluación de la refracción esférica objetiva obtenida con el instrumento OQAS
(Universitat Politècnica de Catalunya, 2011-06)
Master thesis
Open AccessEn este trabajo se ha realizado un estudio clínico para evaluar la veracidad del valor de equivalente esférico (EE) dado por OQAS. Para ello se ha comparado dicho valor con el EE calculado a partir de los valores de ... -
Experimental study of speckle generated by semiconductor light sources: application in double pass imaging
(Universitat Politècnica de Catalunya, 2019-12-09)
Doctoral thesis
Open AccessWith the double pass (DP) technique it is possible to quantify the optical quality of a patient's eye by measuring its point spread function. Due to the low reflectivity of the retina a high-intensity, point-like illumination ... -
Gonio-hyperspectral imaging system based on light-emitting diodes for the analysis of automotive coatings
(Universitat Politècnica de Catalunya, 2016-12-19)
Doctoral thesis
Open AccessGoniochromatic pigments, such as automotive coatings, are known by their appearance changes - especially of colour and visual texture - as a function of the angles of illumination and observation; they are classified as ... -
Graininess characterization by multidimensional scaling
(Universitat Politècnica de Catalunya, 2017-06-28)
Bachelor thesis
Restricted access - author's decisionEls pigments d'efecte especial provoquen un canvi de color segons la direcció d'il·luminació i observació i complexos efectes de textura. Depenent de les condicions d'il·luminació es defineixen dos tipus de textura: sparkle ... -
Hyperspectral retinography: effects of aging in healthy adults
(Universitat Politècnica de Catalunya, 2020-02-14)
Master thesis
48 months embargo -
Hyperspectral retinography in a young healthy population from the visible to the near-infrared
(Universitat Politècnica de Catalunya, 2020-02-14)
Master thesis
Restricted access - confidentiality agreement
