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dc.contributor.authorLan, Yanxiangen_US
dc.contributor.authorDong, Yueen_US
dc.contributor.authorWang, Jiapingen_US
dc.contributor.authorTong, Xinen_US
dc.contributor.authorGuo, Bainingen_US
dc.date.accessioned2015-02-23T17:36:59Z
dc.date.available2015-02-23T17:36:59Z
dc.date.issued2010en_US
dc.identifier.issn1467-8659en_US
dc.identifier.urihttp://dx.doi.org/10.1111/j.1467-8659.2010.01796.xen_US
dc.description.abstractWe present a technique for rapid capture of high quality bidirectional reflection distribution functions(BRDFs) of surface points. Our method represents the BRDF at each point by a generalized microfacet model with tabulated normal distribution function (NDF) and assumes that the BRDF is symmetrical. A compact and light-weight reflectometry apparatus is developed for capturing reflectance data from each surface point within one second. The device consists of a pair of condenser lenses, a video camera, and six LED light sources. During capture, the reflected rays from a surface point lit by a LED lighting are refracted by a condenser lenses and efficiently collected by the camera CCD. Taking advantage of BRDF symmetry, our reflectometry apparatus provides an efficient optical design to improve the measurement quality. We also propose a model fitting algorithm for reconstructing the generalized microfacet model from the sparse BRDF slices captured from a material surface point. Our new algorithm addresses the measurement errors and generates more accurate results than previous work. Our technique provides a practical and efficient solution for BRDF acquisition, especially for materials with anisotropic reflectance. We test the accuracy of our approach by comparing our results with ground truth. We demonstrate the efficiency of our reflectometry by measuring materials with different degrees of specularity, values of Fresnel factor, and angular variation.en_US
dc.publisherThe Eurographics Association and Blackwell Publishing Ltden_US
dc.titleCondenser-Based Instant Reflectometryen_US
dc.description.seriesinformationComputer Graphics Forumen_US
dc.description.volume29en_US
dc.description.number7en_US
dc.identifier.doi10.1111/j.1467-8659.2010.01796.xen_US
dc.identifier.pages2091-2098en_US


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  • 29-Issue 7
    Pacific Graphics 2010 - Special Issue

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