Example-Based Fractured Appearance

Loeïz Glondu 1 Lien Muguercia 2 Maud Marchal 1 Carles Bosch 2 Holly Rushmeier 3 Georges Dumont 1 George Drettakis 4
1 VR4I - Virtual Reality for Improved Innovative Immersive Interaction
IRISA - Institut de Recherche en Informatique et Systèmes Aléatoires, ENS Cachan - École normale supérieure - Cachan, Inria Rennes – Bretagne Atlantique
4 REVES - Rendering and virtual environments with sound
CRISAM - Inria Sophia Antipolis - Méditerranée
Abstract : A common weathering effect is the appearance of cracks due to material fractures. Previous exemplar-based aging and weathering methods have either reused images or sought to replicate observed patterns exactly. We introduce a new approach to exemplar-based modeling that creates weathered patterns on synthetic objects by matching the statistics of fracture patterns in a photograph. We present a user study to determine which statistics are correlated to visual similarity and how they are perceived by the user. We then describe a revised physically-based fracture model capable of producing a wide range of crack patterns at interactive rates. We demonstrate how a Bayesian optimization method can determine the parameters of this model so it can produce a pattern with the same key statistics as an exemplar. Finally, we present results using our approach and various exemplars to produce a variety of fracture effects in synthetic renderings of complex environments. The speed of the fracture simulation allows interactive previews of the fractured results and its application on large scale environments.
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Computer Graphics Forum, Wiley, 2012, 31 (4), pp.1547-1556. 〈10.1111/j.1467-8659.2012.03151.x〉
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Loeïz Glondu, Lien Muguercia, Maud Marchal, Carles Bosch, Holly Rushmeier, et al.. Example-Based Fractured Appearance. Computer Graphics Forum, Wiley, 2012, 31 (4), pp.1547-1556. 〈10.1111/j.1467-8659.2012.03151.x〉. 〈hal-00752381〉

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