GOAPI - Grup d'Òptica Aplicada i Processament d'Imatge

 

El grup desenvolupa línies de recerca relacionades amb el processament de la informació òptica continguda en imatges i d'altres aplicacions de l’òptica visible, amb extensió a les bandes espectrals de l’infraroig pròxim i l’ultravioleta. Abasta la formació investigadora d'estudiants de màster i doctorat. Comprèn temes relacionats amb: la imatge (formació, presentació i anàlisi), la visió, el color i el processat amb làser. Cobreix aplicacions diverses en els camps de la salut visual, la inspecció de teixits tèxtils, la seguretat òptica, la visió artificial, la inspecció automàtica, el tractament i l’anàlisi d’imatges, el reconeixement de formes, la qualitat òptica i visual, les lents intraoculars, la imatge mèdica, el disseny d’instruments, les tècniques de caracterització i mesura, la fotometria, la colorimetria, el color digital, el processat de materials per irradiació làser i temes afins.

The group?s aim is to carry out research related to the applications of visible optics, including near infrared and ultraviolet spectral bands. It deals with images, vision, colour and laser processing. It embraces a variety of applications in the fields of machine vision, automatic inspection, image analysis and processing, pattern recognition,optical and visual qualities, intraocular lenses, instrumentation and measuring techniques, photometry, colour measurement, digital colour, laser processing of materials, laser marking, waveguides, etc.
The aims of the group involve the following three areas:
- Image processing. The acquisition, analysis, display and processing of images. Optical, digital and hybrid operations performed for a given application, such as pattern recognition, feature extraction, image improvement, fault detection, identification, classification, discrimination, codification, characterisation, etc. Systems, devices and illumination environments for image capturing and display. Human vision models applied to

The group?s aim is to carry out research related to the applications of visible optics, including near infrared and ultraviolet spectral bands. It deals with images, vision, colour and laser processing. It embraces a variety of applications in the fields of machine vision, automatic inspection, image analysis and processing, pattern recognition,optical and visual qualities, intraocular lenses, instrumentation and measuring techniques, photometry, colour measurement, digital colour, laser processing of materials, laser marking, waveguides, etc.
The aims of the group involve the following three areas:
- Image processing. The acquisition, analysis, display and processing of images. Optical, digital and hybrid operations performed for a given application, such as pattern recognition, feature extraction, image improvement, fault detection, identification, classification, discrimination, codification, characterisation, etc. Systems, devices and illumination environments for image capturing and display. Human vision models applied to

Recent Submissions

  • Visual acuity and defocus curves with six multifocal intraocular lenses 

    Gil Arnal, Julian Miguel Ángel; Varón Puentes, Maria Consuelo; Cardona Torradeflot, Genís; Buil Calvo, José Antonio (Springer, 2020)
    Article
    Restricted access - publisher's policy
    Purpose: The purpose of this prospective, randomized, double masked, study was to compare the visual performance of patients after bilateral implantation of six different IOLs. Methods: The following IOLs were used in the ...

  • Clinical assessment of chromatic aberration in phakic and pseudophakic eyes 

    Millán Garcia-Varela, M. Sagrario; Vega Lerín, Fidel; Garzon, Nuria (Red Iberoamericana de Óptica (RIAO), 2019)
    Conference report
    Restricted access - publisher's policy
    We present a psychophysical method and a simple setup for the clinical assessment of the longitudinal chromatic aberration (LCA) in phakic and pseudophakic eyes. A proof of concept built from inexpensive and non-sophisticated ...

  • Caracterización espacial de un microdisplay AMOLED verde 

    Azor Morón, Juan Antonio; Millán Garcia-Varela, M. Sagrario (Red Iberoamericana de Óptica (RIAO), 2019)
    Conference lecture
    Restricted access - publisher's policy

  • Integration of the photon-counting technique and a joint transform correlator to encrypt and authenticate images 

    Vilardy Ortiz, Juan Manuel; Millán Garcia-Varela, M. Sagrario; Pérez Cabré, Elisabet (Red Iberoamericana de Óptica (RIAO), 2019)
    Conference lecture
    Restricted access - publisher's policy

  • Toward and ophtalmic imaging system with extended depth of focus using the asymmetric phase mask 

    Romero Pérez, Lenny Alexandra; Marrugo Hernandez, Andrés Guillermo; Millán Garcia-Varela, M. Sagrario (Red Iberoamericana de Óptica (RIAO), 2019)
    Conference lecture
    Restricted access - publisher's policy
    We study the trade-off of extending the depth-of-focus with an asymmetric phase mask optical element and the decrease of image quality in terms of a numerical optimization scheme that could be used in ophthalmic imaging systems.

  • Efecto del centrado de retinografías en los índices de tortuosidad de los vasos sanguíneos 

    Ramírez Cano, Natalia; Rallo Capdevila, Miguel; Millán Garcia-Varela, M. Sagrario (Red Iberoamericana de Óptica (RIAO), 2019)
    Conference lecture
    Restricted access - publisher's policy

  • White light interferometry for estimating the surface geometry of intraocular lenses 

    Altamar Mercado, Hernando; Vega Lerín, Fidel; Patiño Vanegas, Alberto; Marrugo Hernandez, Andrés Guillermo; Millán Garcia-Varela, M. Sagrario (Red Iberoamericana de Óptica (RIAO), 2019)
    Conference lecture
    Restricted access - publisher's policy
    In this work, we use low magnification microscopy and white light interferometry (WLSI) to perform 3D reconstructions of the surfaces of two monofocal intraocular lenses (IOLs). With the 3D reconstructions, we estimated ...

  • Low f-number multiorder diffractive lenses 

    Millán Garcia-Varela, M. Sagrario; Pérez Cabré, Elisabet; Valverde Sánchez, José (Red Iberoamericana de Óptica (RIAO), 2019)
    Conference lecture
    Restricted access - publisher's policy

  • Removing dust artifacts in retinal images via dictionary learning and sparse-based inpainting 

    Barrios Montes, Erik Miguel; Marrugo Hernandez, Andrés Guillermo; Millán Garcia-Varela, M. Sagrario (Institute of Electrical and Electronics Engineers (IEEE), 2019)
    Conference report
    Restricted access - publisher's policy
    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 ...

  • SEDOPTICA newsletter: noticias de SEDOPTICA 

    Moreno, Ignacio; Millán Garcia-Varela, M. Sagrario; Vallmitjana Rico, Santiago (2019-06-17)
    Article
    Open Access
    El boletín de noticias de SEDOPTICA recoge la actividad de la sociedad y sus miembros en el segundo trimestre de 2019.

  • SEDOPTICA newsletter: noticias de SEDOPTICA 

    Moreno, Ignacio; Millán Garcia-Varela, M. Sagrario; Vallmitjana Rico, Santiago (2019-09-16)
    Article
    Open Access
    El boletín de noticias de SEDOPTICA recoge la actividad de la sociedad y sus miembros en el tercer trimestre del año 2019.

  • SEDOPTICA newsletter: noticias de SEDOPTICA 

    Millán Garcia-Varela, M. Sagrario; Moreno, Ignacio; Vallmitjana Rico, Santiago (2019-03-16)
    Article
    Open Access
    Primer boletín de SEDOPTICA del año 2019 que recoge la intensa actividad de la sociedad y sus miembros en el primer trimestre.

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