A5102720119- Color Science and Applications
- Visual perception and processing mechanisms
- Dental materials and restorations
- Dental Implant Techniques and Outcomes
- Color perception and design
- Bone Tissue Engineering Materials
- Cellular and Composite Structures
- Aesthetic Perception and Analysis
- Additive Manufacturing and 3D Printing Technologies
- Dental Erosion and Treatment
- Advanced Image Fusion Techniques
- Image Enhancement Techniques
- Automotive and Human Injury Biomechanics
- Aluminum Alloy Microstructure Properties
- Polymer Foaming and Composites
- Titanium Alloys Microstructure and Properties
- Impact of Light on Environment and Health
- Remote-Sensing Image Classification
- Aluminum Alloys Composites Properties
- Polymer composites and self-healing
- Advanced Malware Detection Techniques
- Cancer Diagnosis and Treatment
- Advanced Data Storage Technologies
- Occupational health in dentistry
- Cultural Heritage Materials Analysis
University of Minho
2013-2025
Centro Universitário do Maranhão
2024
Software (Spain)
2014
Doho University
2008
The number of colors discernible by normal trichromats has been estimated for the idealized object-color solid. How well these estimates apply to natural scenes is an open question, as it unknown how much their approach theoretical limits. aim this work was estimate based on a database hyperspectral images 50 scenes. color volume each scene computed in CIELAB space and analyzed using CIEDE2000 color-difference formula. It found that set about 30% maximum full solid, corresponded 2.3 million...
Introdução: A ocorrência de metástase em cavidade oral tumores malignos é considerada rara e representa menos 1% todas as malignidades rela-tadas nesta região. As fontes primárias mais comuns metastáticos para a região são mama, pulmão rim. Objetivo: O objetivo deste traba-lho realizar uma revisão literatura quanto à das metástases câncer mama oral. Metodologia: seleção dos artigos composição da amostra foi realizada partir bases dados SciELO (Scientific Electronic Library Online), PubMed...
ABSTRACT This study evaluated the influence of applied pressure on shear bond strength (SBS) between commercial 3Y‐TZP zirconia and self‐adhesive resin cement. Five test groups were created, each subjected to different pressures: 195.15, 97.47, 48.74, 9.75, 0.20 kPa. A piston‐type device was used assess effect these pressures cement layer thickness SBS. The results demonstrated that highest (195.15 kPa) produced thinnest layers (36.60 ± 1.67 μm) SBS values (58.8 1.6 MPa), whereas lower (0.20...
The visual effects of lighting on art paintings is an important aspect that should be considered by museum curators. aim this work was to determine the correlated color temperature (CCT) daylight illumination preferred observers when appreciating paintings. Hyperspectral images 11 oil were collected at museum, and appearance under illuminants with CCT from 25,000 K 3600 computed. In a psychophysical experiment using precise CRT reproductions paintings, had adjust illuminant such it produced...
A variety of light sources are used in museum environments where the main concern is to prevent damaging effects on paintings. Yet, visual impression an artistic painting strongly influenced by intensity and spectral profile illumination. The aim this work was determine psychophysically illumination preferred observers when seeing paintings dated from Renaissance époque investigate how their preferences correlate with color temperature chromatic diversity Hyperspectral images five oil wood...
Simple color-difference formulae and pictorial images have traditionally been used to estimate the visual impact of color errors introduced by image-reproduction processes. But limited gamut RGB cameras constrains such analyses, particularly natural scenes. The purpose this work was sensitivity deliberately into pictures synthesized from hyperspectral scenes without constraints compare discrimination thresholds expressed in CIELAB S-CIELAB spaces. From each original image, a set approximate...
The number of discernible colors perceived by normal trichromats when viewing natural scenes can be estimated analyzing idealized color volumes or hyperspectral data obtained from actual scenes. purpose the present work was to estimate relative impairment in chromatic diversity experienced dichromats and investigate effects colored lenses. estimates were computationally analysis images using a quantitative model dichromats' vision. volume corresponding each scene represented CIELAB space...
Color rendering indices are used to access the quality of lighting but, in addition other well-known limitations, not defined for color deficient observers. We evaluated normal and observers context art paintings by estimating number colors they perceive when looking at paintings. Hyperspectral data from 11 oil were analyzed compute discernible assumed rendered under 55 CIE illuminants. Models perception applied estimates. It was found that had low correlation with traditional some...
Abstract Yttria‐stabilized zirconia (YSZ) is being proposed as an alternative material to Titanium for dental implants due its aesthetic and biocompatibility properties. However, it yet define the optimal surface treatment improve YSZ bioactivy. Texturization a promising approach, but biological role of patterned surfaces in cell cultures be determined. Thus, cellular behavior osteoblasts fibroblasts contact with groove‐texturized was investigated. discs were groove‐textured by conventional...
Abstract The visual impression of an artistic painting is influenced both by the colour and specific spectral structure rendering light source. relationship between illuminant appearance assumes particular relevance with advent sources almost arbitrary distribution, like modern LED based lighting. aim this work was to study, computationally, chromatic effects on paintings illuminants same as D65 but different profile. Hyperspectral data from twenty oil were used in analysis. A large...
Abstract The goal of this work was to evaluate the colour rendering indoor lighting with CIE illuminants and white LEDs by estimating chromatic diversity produced for normal deficient observers. Reflectance spectra a collection scenes made objects typically found indoors were obtained hyperspectral imaging. Chromatic computed 55 five LED light sources number different colours perceived in analysed. A considerable variation across illuminants, best producing about 50% more than worst. For...
Abstract Different zirconia porous layers were produced on dense substrates by slip casting using powder with different mean sizes: 40 μm (Z40), 70 (Z70), and 100 (Z100). The dynamic static coefficients of friction against bovine femoral bone, mimicking the implantation process, conducted a ball‐on‐flat reciprocating sliding tribometer under 3 N normal load. Additionally, assessed regard to their low temperature degradation (aging). Results revealed that able keep integrity during testes no...