AppGen

Yue Dong, Xin Tong, Fabio Pellacini, Baining Guo
2011 Proceedings of the 2011 SIGGRAPH Asia Conference on - SA '11  
a) Input image (b) User interaction (c) Rendering result Figure 1: Given a single image (a), our system models the spatially varying reflectance properties and normals with a few strokes specified by the user (b). The resulting material can be rendered under different lighting and viewing conditions (c). Abstract We present AppGen, an interactive system for modeling materials from a single image. Given a texture image of a nearly planar surface lit with directional lighting, our system models
more » ... e detailed spatially-varying reflectance properties (diffuse, specular and roughness) and surface normal variations with minimal user interaction. We ask users to indicate global shading and reflectance information by roughly marking the image with a few user strokes, while our system assigns reflectance properties and normals to each pixel. We first interactively decompose the input image into the product of a diffuse albedo map and a shading map. A two-scale normal reconstruction algorithm is then introduced to recover the normal variations from the shading map and preserve the geometric features at different scales. We finally assign the specular parameters to each pixel guided by user strokes and the diffuse albedo. Our system generates convincing results within minutes of interaction and works well for a variety of material types that exhibit different reflectance and normal variations, including natural surfaces and man-made ones.
doi:10.1145/2024156.2024180 fatcat:tjq4dzlwivgi7kknz4hoxhn64u