HOLZSCHUCH, Nicolas; PACANOWSKI, Romain

Métadonnées

Licence d’utilisation du document

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]

Langue

Communication dans un congrès avec actes

Ce document a été publié dans

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

Résumé en anglais

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.< Réduire

URI

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

Project ANR

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

Origine

Importé de hal

Unités de recherche

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