HOLZSCHUCH, Nicolas; PACANOWSKI, Romain

Metadatos

Licencia de uso del documento

HOLZSCHUCH, Nicolas
Models and Algorithms for Visualization and Rendering [MAVERICK ]

PACANOWSKI, Romain
Melting the frontiers between Light, Shape and Matter [MANAO]
Laboratoire Photonique, Numérique et Nanosciences [LP2N]

Idioma

Communication dans un congrès avec actes

Este ítem está publicado en

Workshop on Material Appearance Modeling, 2017-06-18, Helsinki. 2017-06-18p. 1-4

Resumen en inglés

For material acquisition, we use digital cameras and process the pictures. We usually treat the cameras as perfect pinhole cameras, with each pixel providing a point sample of the incoming signal. In this paper, we study the impact of camera optical and electronic systems. Optical system effects are modelled by the Modulation Transfer Function (MTF). Electronic System effects are modelled by the Pixel Response Function (PRF). The former is convolved with the incoming signal, the latter is multiplied with it. We provide a model for both effects, and study their impact on the measured signal. For high frequency incoming signals, the convolution results in a significant decrease in measured intensity, especially at grazing angles. We show this model explains the strange behaviour observed in the MERL BRDF database at grazing angles.< Leer menos

URI

https://oskar-bordeaux.fr/handle/20.500.12278/181869

Proyecto ANR

Reproduction de textures d'objets d'art ancien à base de micro-géométrie - ANR-15-CE38-0005

Orígen

Importado de Hal

Centros de investigación

Laboratoire Photonique, Numérique et Nanosciences (LP2N) - UMR 5298