Academic Journal
Inverse Global Illumination: Recovering Reflectance Models of Real Scenes from Photographs
| العنوان: | Inverse Global Illumination: Recovering Reflectance Models of Real Scenes from Photographs |
|---|---|
| المؤلفون: | Yizhou Yu, Paul Debevec, Jitendra Malik, Tim Hawkins |
| المساهمون: | The Pennsylvania State University CiteSeerX Archives |
| المصدر: | http://www1.cs.columbia.edu/~ravir/6998/papers/p215-yu.pdf. |
| سنة النشر: | 1999 |
| المجموعة: | CiteSeerX |
| مصطلحات موضوعية: | Radiosity, Rendering |
| الوصف: | In this paper we present a method for recovering the reflectance properties of all surfaces in a real scene from a sparse set of photographs, taking into account both direct and indirect illumination. The result is a lighting-independent model of the scene's geometry and reflectance properties, which can be rendered with arbitrary modifications to structure and lighting via traditional rendering methods. Our technique models reflectance with a lowparameter reflectance model, and allows diffuse albedo to vary arbitrarily over surfaces while assuming that non-diffuse characteristics remain constant across particular regions. The method's input is a geometric model of the scene and a set of calibrated high dynamic range photographs taken with known direct illumination. The algorithm hierarchically partitions the scene into a polygonal mesh, and uses image-based rendering to construct estimates of both the radiance and irradiance of each patch from the photographic data. The algorithm computes the expected location of specular highlights, and then analyzes the highlight areas in the images by running a novel iterative optimization procedure to recover the diffuse and specular reflectance parameters for each region. Lastly, these parameters are used in constructing high-resolution diffuse albedo maps for each surface. The algorithm |
| نوع الوثيقة: | text |
| وصف الملف: | application/pdf |
| اللغة: | English |
| Relation: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.4.4292; http://www1.cs.columbia.edu/~ravir/6998/papers/p215-yu.pdf |
| الاتاحة: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.4.4292 http://www1.cs.columbia.edu/~ravir/6998/papers/p215-yu.pdf |
| Rights: | Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
| رقم الانضمام: | edsbas.7319D36E |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |