Building Illumination Coherent 3D Models of Large-Scale Outdoor Scenes |
| |
Authors: | Alejandro Troccoli Peter Allen |
| |
Affiliation: | (1) 2701 San Tomas Expy, Santa Clara, CA 95054, USA;(2) Department of Computer Science, Columbia University, 1214 Amsterdam Ave. MC 401, New York, NY 10027, USA |
| |
Abstract: | Systems for the creation of photorealistic models using range scans and digital photographs are becoming increasingly popular
in a wide range of fields, from reverse engineering to cultural heritage preservation. These systems employ a range finder
to acquire the geometry information and a digital camera to measure color detail. But bringing together a set of range scans
and color images to produce an accurate and usable model is still an area of research with many unsolved problems. In this
paper we address the problem of how to build illumination coherent integrated texture maps from images that were taken under
different illumination conditions. To achieve this we present two different solutions. The first one is to align all the images
to the same illumination, for which we have developed a technique that computes a relighting operator over the area of overlap
of a pair of images that we then use to relight the entire image. Our proposed method can handle images with shadows and can
effectively remove the shadows from the image, if required. The second technique uses the ratio of two images to factor out
the diffuse reflectance of an image from its illumination. We do this without any light measuring device. By computing the
actual reflectance we remove from the images any effects of the illumination, allowing us to create new renderings under novel
illumination conditions. |
| |
Keywords: | 3D modeling Inverse rendering Texture acquisition |
本文献已被 SpringerLink 等数据库收录! |
|