Zobrazeno 1 - 10
of 12
pro vyhledávání: '"Vasco M. N. de Almeida"'
Autor:
Carlos Amaral, Miguel Castelo-Branco, Vasco M. N. de Almeida, Marta Teixeira, Marco Simões, Sérgio M. C. Nascimento
Publikováno v:
Repositório Científico de Acesso Aberto de Portugal
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP
Introduction: Color constancy, a property of conscious color experience, maintains object color appearance across illuminant changes. We investigated the neural correlates of subliminal vs. conscious stimulus deviations of color constancy manipulatio
Autor:
Jorge L. A. Santos, Sérgio M. C. Nascimento, Vasco M. N. de Almeida, João M. M. Linhares, Ruben Pastilha, Andreia Esteves Gomes
Publikováno v:
Repositório Científico de Acesso Aberto de Portugal
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP
Dichromacy impairs color vision and impoverishes the discrimination of surface colors in natural scenes. Computational estimates based on hyperspectral imaging data from natural scenes suggest that dichromats can discriminate only about 10% of the co
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6f87b84667ca74d5803e8f8597056434
Publikováno v:
Perception. 39:770-779
The effect of scene dimensionality on colour constancy was tested with real scenes and objects. Observers viewed a three-dimensional (3-D) scene, or its two-dimensional (2-D) planar projection, through a large beam-splitter that projected the virtual
Autor:
João M. M. Linhares, Sérgio M. C. Nascimento, Vasco M. N. de Almeida, Catarina João, Jorge L. A. Santos
Publikováno v:
Lecture Notes in Computer Science ISBN: 9783319159782
CCIW
CCIW
The aim of this work was to investigate the effect on a display gamut of varying the optical density and the position of the maximum sensitivity of the cones spectra of anomalous trichromatic observers. The anomalous cone spectral sensitivities were
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e4b63b22a1fcd8d63adbf79350d0d149
https://doi.org/10.1007/978-3-319-15979-9_10
https://doi.org/10.1007/978-3-319-15979-9_10
Autor:
Sérgio M. C. Nascimento, João M. M. Linhares, Jorge L. A. Santos, Vasco M. N. de Almeida, Catarina João
Publikováno v:
Lecture Notes in Computer Science ISBN: 9783319159782
CCIW
CCIW
It is well known that color coding facilitates search and iden- tification in real-life tasks. The aim of this work was to compare reac- tion times for normal color and dichromatic observers in a visual search experiment. A unique distracter color wa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::16304428de8a4e12cfc0669dffb017e9
https://hdl.handle.net/1822/39759
https://hdl.handle.net/1822/39759
Publikováno v:
Visual Neuroscience. 21:337-340
Relational color constancy refers to the constancy of the perceived relations between the colors of surfaces of a scene under changes in the spectral composition of the illuminant. Spatial ratios of cone excitations provide a natural physical basis f
Publikováno v:
2013 13th International Symposium on Communications and Information Technologies (ISCIT).
Human iris recognition systems are an attractive form of non-intrusive bio-identification with many potential applications. However, the accuracy of these systems is still limited due to challenges presented by iris surface deformation. This paper pr
Autor:
Jorge L. A. Santos, Sérgio M. C. Nascimento, João M. M. Linhares, Vasco M. N. de Almeida, Ruben Pastilha
Publikováno v:
Journal of Vision. 16:638
Autor:
Leticia Álvaro, Catarina João, Eva Silva, Sérgio M. C. Nascimento, João M. M. Linhares, Vasco M. N. de Almeida, Jorge L. A. Santos
Publikováno v:
Repositório Científico de Acesso Aberto de Portugal
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP
The aim of this work was to assess the influence of dynamic luminance contrast noise masking (LCNM) on color discrimination for color normal and anomalous trichromats. The stimulus was a colored target on a background presented on a calibrated CRT di
Publikováno v:
Perception. 38(8)
In a complex natural scene the colour and intensity of the illumination may vary considerably across the scene. Changes in intensity can easily be detected but the same does not seem to be true of colour changes. We investigated the extent to which c