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

  • The relationship between fixation stability and retinal structural parameters in children with anisometropic, strabismic and mixed amblyopia 

    Mompart Martínez, Raquel; Argilés Sans, Marc; Cardona Torradeflot, Genís; Cavero Roig, Lluís; González Sanchís, Lluís; Pighin, Maria S (2023-07-06)
    Article
    Open Access
    Background: Amblyopia is an ocular condition leading to structural and functional changes. The relationship between these changes is complex and remains poorly understood. (2) Methods: Participants included 31 children ...

  • Loss of blink regularity and its impact on ocular surface exposure 

    Cardona Torradeflot, Genís; Argilés Sans, Marc; Pérez Cabré, Elisabet (2023-07-13)
    Article
    Open Access
    Background: Changes in blink parameters have been found to influence ocular surface exposure, eliciting symptoms of dry eye and ocular signs. The aim of the study was to highlight the relevance of including blink regularity ...

  • Quality of life of caregivers of children with visual impairment: a qualitative approach 

    Lupón Bas, Marta; Armayones Ruiz, Manuel; Cardona Torradeflot, Genís (Elsevier, 2023-05-16)
    Article
    Restricted access - publisher's policy
    Background: Receiving a diagnosis of a child with untreatable visual impairment (VI) may have a negative impact on parents and caregivers, and affect their quality of life (QoL). Aims: To use a qualitative research approach ...

  • Beam-shaping extended depth of focus intraocular lens: optical assessment with corneas of increasing spherical aberration 

    Madrid Costa, David; Fernández-Vega Cueto, Luis; Azor Morón, Juan Antonio; Vega Lerín, Fidel; Millán Garcia-Varela, M. Sagrario; Alfonso, José F. (2023-02)
    Article
    Restricted access - publisher's policy
    PURPOSE:To assess the optical quality and halo formation of a beam-shaping extended depth-of-focus (EDOF) intraocular lens (IOL) (AcrySof IQ Vivity; Alcon Laboratories, Inc) with corneas of long-range spherical aberration ...

  • Retinal vessel local tortuosity under a macula-to-optic disc central-framing change 

    Ramírez Cano, Natalia; Rallo Capdevila, Miguel; Millán Garcia-Varela, M. Sagrario (2023-03-01)
    Article
    Open Access
    Some ocular and cardiovascular diseases can be detected through the increased tortuosity of retinal blood vessels. Objective tortuosity measures can be obtained from digital image analysis of a retinography. This study ...

  • Pitfalls of using NIR-based clinical instruments to test eyes implanted with diffractive intraocular lenses 

    Vega Lerín, Fidel; Faria-Ribeiro, Miguel; Armengol Cebrian, Jesús; Millán Garcia-Varela, M. Sagrario (2023-04-01)
    Article
    Open Access
    The strong wavelength dependency of diffractive elements casts reasonable doubts on the reliability of near-infrared- (NIR)-based clinical instruments, such as aberrometers and double-pass systems, for assessing, post-surgery, ...

  • Optical and clinical outcomes of an enhanced monofocal intraocular lens for high hyperopia 

    Fernández-Vega Cueto, Luis; Vega Lerín, Fidel; Guerra Velasco, Raquel; Millán Garcia-Varela, M. Sagrario; Madrid Costa, David; Alfonso, José F. (2022-09)
    Article
    Open Access
    Purpose: To evaluate the optical and clinical performance of an enhanced monofocal intraocular lens (IOL) (TECNIS Eyhance ICB00; Johnson & Johnson Vision) in patients with high hyperopia and a short axial length. Methods: ...

  • Nonlinear encryption for multiple images based on a joint transform correlator and the Gyrator transform 

    Pérez, Ronal A; Vilardy Ortiz, Juan Manuel; Pérez Cabré, Elisabet; Millán Garcia-Varela, M. Sagrario; Torres Moreno, Cesar Orlando (Multidisciplinary Digital Publishing Institute (MDPI), 2023-02-01)
    Article
    Open Access
    A novel nonlinear encryption–decryption system based on a joint transform correlator (JTC) and the Gyrator transform (GT) for the simultaneous encryption and decryption of multiple images in grayscale is proposed. This ...

  • Double image encryption system using a nonlinear joint transform correlator in the Fourier domain 

    Pérez, Ronal A; Pérez Cabré, Elisabet; Vilardy Ortiz, Juan Manuel; Millán Garcia-Varela, M. Sagrario; Torres Moreno, Cesar Orlando (Multidisciplinary Digital Publishing Institute (MDPI), 2023-02-02)
    Article
    Open Access
    In this work, we present a new nonlinear joint transform correlator (JTC) architecture in the Fourier domain (FD) for the encryption and decryption of two simultaneous images. The main features of the proposed system are ...

  • El sueño como factor de riesgo en el avance de la miopía 

    Fambuena Muedra, Isabel; Díez Ajenjo, Mª Amparo; Ordiñaga Monreal, Enrique; Peris Martínez, Cristina; Puertas Cuestas, Francisco Javier (2022)
    Part of book or chapter of book
    Open Access

  • Halo in extended depth of focus and bifocal intraocular lenses 

    Vega Lerín, Fidel; Azor Morón, Juan Antonio; Millán Garcia-Varela, M. Sagrario (2022-07)
    Article
    Restricted access - publisher's policy
    Purpose: To evaluate the size and intensity of the halos generated in distance vision by bifocal and extended depth of focus (EDOF) intraocular lenses (IOLs) as a function of pupil size, lens base power and lens addition. ...

  • Short- and mid-term changes in CORVIS ST parameters in successful, adult orthokeratology patients 

    Pérez Corral, Juan Enrique; Cardona Torradeflot, Genís; Piñero Llorens, David Pablo; Barroso Pérez, David Cesar; Armadans Sorní, Laura (2022-11-14)
    Article
    Restricted access - publisher's policy
    Clinical relevance: The analysis of the changes in various biomechanical and tomographic characteristics of the cornea associated with orthokeratology may allow to identify potential mid- and long-term structural alterations, ...

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