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Computers & Graphics 27 (2003) 517 Integrating synthetic objects into real scenes

Summary: Computers & Graphics 27 (2003) 5­17
Integrating synthetic objects into real scenes
Francisco Abad*, Emilio Camahort, Roberto Viv!o
Dep. de Sistemas Inform!aticos y Computaci!on, Polytechnic University of Valencia, Camino de Vera s/n 46071 Valencia, Spain
This paper presents a methodology for integrating synthetic objects into real scenes. We take a set of photographs of
the real scene and build a simple image-based model. We use high dynamic range images to build an accurate
representation of the lighting in the scene. Then we insert a synthetic object into the model and compute its illumination
and shading using the lighting information. Illumination changes produced by the synthetic object are also applied to
real-scene objects located nearby. We show how easy it is to achieve photo-realistic results without specialized
hardware. Our approach takes advantage of techniques like automatic camera calibration, high dynamic range image
capture and image-based lighting.
r 2002 Elsevier Science Ltd. All rights reserved.
Keywords: Digital composition; Image-based lighting; Special effects; RADIANCE
1. Introduction
Obtaining photo-realistic synthetic images is one of
the main objectives of Computer Graphics. The com-
plexity of the objects that make up the real world is the
main problem in attaining such realism [1]. A family of
techniques capable of creating photo-realistic images


Source: Abad, Francisco - Departamento de Sistemas Informáticos y Computación, Universitat Politčcnica de Valčncia


Collections: Computer Technologies and Information Sciences