Nearly all experts agree that insecticidetreated mosquito nets (ITNs) are a lifesaving intervention, supported by strong evidence from carefully conducted trials that show ITNs to be efficacious at preventing all-cause child mortality and malaria morbidity in children and pregnant women [1,2]. Under program conditions, ITNs have also been associated with significant reductions in malaria morbid...

Shading and classification are among the most powerful and important techniques used in volume rendering. Unfortunately, for hardware accelerated volume rendering based on OpenGL, direct classification is only supported on SGI platforms and shading could previously only be approximated inaccurately, resulting in shading artifacts mostly visible in darkening artifacts. So far, the combination of...

Humans use shading as a cue to three-dimensional form by combining low-level information about light intensity with high-level knowledge about objects and the environment. Here, we examine how cuttlefish Sepia officinalis respond to light and shadow to shade the white square (WS) feature in their body pattern. Cuttlefish display the WS in the presence of pebble-like objects, and they can shade ...

Existing shape-from-shading algorithms assume constant reflectance across the shaded surface. Multi-colored surfaces are excluded because both shading and reflectance affect the measured image intensity. Given a standard RGB color image, we describe a method of eliminating the reflectance effects in order to calculate a shading field that depends only on the relative positions of the illuminant...

Procedural material shaders continue to pop up since the advent of fragment programmability. Most of these shaders concentrate on interesting animated effects. The cg shades demo successfully explores the use of fragment shader programming for a different kind of materials: Highly repetitive, man-made materials. The given code shows a variety of implementation options adapted to different usage...

Shading models that wrap around the hemisphere have been used to approximate subsurface scattering, area light sources, and softer reflectance profiles. We generalize a specific technique that has been used in games by parameterizing the amount of wraping while retaining important mathematical properties. We include details on how to incorporate theses models with spherical harmonic lighting. 1...

Graphics hardware evolution in the past year has been highlighted by improved shading resources, the introduction of dynamic flow control and the emergence of multi-GPU system configurations. Executed program length increased substantially and register availability became more affordable. As a result, compiler support for segmenting a shading program to fit hardware constraints has diminished a...