Abstract
We describe a system for non-photorealistic rendering (NPR) of
virtual environments. In real time, it synthesizes imagery of
architectural interiors using stroke-based textures. We address the
four main challenges of such a system -- interactivity, visual
detail, controlled stroke size, and frame-to-frame coherence --
through image based rendering (IBR) methods. In a preprocessing
stage, we capture photos of a real or synthetic environment, map the
photos to a coarse model of the environment, and run a series of NPR
filters to generate textures. At runtime, the system
re-renders the NPR textures over the geometry of the coarse
model, and it adds dark lines that emphasize creases and silhouettes.
We provide a method for constructing non-photorealistic textures from
photographs that largely avoids seams in the resulting imagery. We
also offer a new construction, art-maps, to control stroke
size across the images. Finally, we show a working system that
provides an immersive experience rendered in a variety of NPR styles.
Complete article [Acrobat pdf file]
