| Name: | Description: | Size: | Format: | |
|---|---|---|---|---|
| Disseração | 9.67 MB | Adobe PDF | ||
| Anexos | 16.75 MB | Adobe PDF |
Authors
Abstract(s)
Um estudo sobre a percepção da qualidade de vídeos 3D exibidos com mudanças de cor é
apresentado. As cores de sequências de vídeos 3D foram mudadas no espaço de cor CIE 1976 (L*a*b*), com a aplicação de um erro cromático pré-de nido E ab. As cores foram inicialmente divididas em clusters com o algoritmo K-Means. Cada cluster de cor é deslocado pelo erro cromático pré-de nido com uma orientação aleatória nas coordenadas cromáticas a*b*. Aplicando
erros E ab de 6, 12 e 18 unidades a um conjunto de seis vídeos 3D foi obtido um conjunto de vídeos 3D para a experiencia. Estes vídeos foram mostrados a vários observadores, em que lhes foi pedido para classi car a qualidade do conjunto de vídeos observados tendo em conta a sua naturalidade quanto à cor, ao mesmo tempo que era capturado a atenção do utilizador a diferentes vídeos usando um dispositivo de "eye-tracking". Foi feito um estudo para testar e quanti car a sensibilidade às alterações de cor, bem como a análise da variação de atenção com a variação da cor.
A study on the perceived quality of 3D video displayed with color changes is presented . The colors of 3D video sequences have been changed in CIE 1976 (L*a*b*) color space, with the application of a prede ned chromatic error E ab. The colors were initially divided into clusters with the K -Means algorithm. Each cluster is shifted by the prede ned chromatic error with a random direction in a*b* chromatic coordinates. Applying the E ab errors of 6 , 12 and 18 units to the six 3D video a set of modi ed 3D videos been collected for the experiment. These videos were shown to individuals, where were asked to rate the quality of the observed video set based on their naturalness, at the same time it was captured the attention of the user to the different videos using an "eye-tracking"device. A study was conducted to test and quantify the sensitivity to color changes, as well as analysis of attention variance to the color variation.
A study on the perceived quality of 3D video displayed with color changes is presented . The colors of 3D video sequences have been changed in CIE 1976 (L*a*b*) color space, with the application of a prede ned chromatic error E ab. The colors were initially divided into clusters with the K -Means algorithm. Each cluster is shifted by the prede ned chromatic error with a random direction in a*b* chromatic coordinates. Applying the E ab errors of 6 , 12 and 18 units to the six 3D video a set of modi ed 3D videos been collected for the experiment. These videos were shown to individuals, where were asked to rate the quality of the observed video set based on their naturalness, at the same time it was captured the attention of the user to the different videos using an "eye-tracking"device. A study was conducted to test and quantify the sensitivity to color changes, as well as analysis of attention variance to the color variation.
Description
Keywords
Mean opinion source MOS Eye-tracking Rastreamento ocular
Citation
Publisher
Universidade da Beira Interior