Portal:Computer graphics

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Computer graphics

A 3D projection of a 4D Pentachoron performing a simple rotation.

Computer graphics includes almost everything on computers that is not text or sound but is normally considered as different from photography. Today almost every computer can do some graphics, and people have come to expect that they will interface with their computer through icons and pictures rather than solely by typing. The term computer graphics has additional meanings:

Today much of our life is affected by computers, and by computer graphics. Whether you see them on television, in newspapers, in weather reports or while at the doctor's surgery, computer images are all around you. A well-chosen graph is able to transform a complex table of numbers into meaningful results. Such graphs are used to illustrate papers, reports, and theses, as well as providing the basis for presentation material in the form of slides and overhead transparencies. A range of tools and facilities are available to enable users to visualise their data, and computer graphics are used in many disciplines.

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Direct illumination and radiosity

Radiosity is a global illumination algorithm used in 3D computer graphics rendering. Radiosity is an application of the finite element method to solving the rendering equation for scenes with purely diffuse surfaces. Unlike Monte Carlo algorithms (such as path tracing) which handle all types of light paths, typical radiosity methods only account for paths of the form LD*E, i.e., paths which leave a light source and are reflected diffusely some number of times (possibly zero) before hitting the eye.

Radiosity methods were first developed in about 1950 in the engineering field of heat transfer. They were later refined specifically for application to the problem of rendering computer graphics in 1984 by researchers at Cornell University. Find out more...

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Complete neuron cell diagram en.svg

Vector diagram of a typical myelinated vertebrate neuron

Image credit: Mariana Ruiz Villarreal (LadyofHats)

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