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One of the simpler ways of increasing the size, replacing every pixel with a number of pixels of the same color. The resulting image is larger than the original, and preserves all the original detail, but has (possibly undesirable) jaggedness. The diagonal lines of the "W", for example, now show the "stairway" shape characteristic of nearest ...
SVG images support various features, including the ability to apply SVG filters that applies transform image content. Stone discovered that by measuring the time it took for a browser to render a morphological filter over a known set of pixels and then comparing this with the time taken to render the same filter over a pixel from an unknown ...
U.S. patent 6,219,025 – Mapping image data samples to pixel sub-components on a striped display device; U.S. patent 6,239,783 – Weighted mapping of image data samples to pixel sub-components on a display device; U.S. patent 6,307,566 – Methods and apparatus for performing image rendering and rasterization operations; Complex color filtering:
A procedural image rendered with Aqsis. Aqsis is a free rendering suite compliant with the RenderMan standard. It is available under the BSD, previously under GPL. Its main author and project manager is Paul Gregory. The Aqsis project consists of a renderer, shader compiler and a few other supporting components.
Example image with fireflies (click to enlarge and examine closely). Image with fireflies removed through postprocessing. Fireflies are rendering artifacts resulting from numerical instabilities in solving the rendering equation. They manifest themselves as anomalously-bright single pixels scattered over parts of the image.
jrMan renderer is an open-source version of the Reyes rendering algorithm used by Pixar's PhotoRealistic RenderMan, implemented in Java by Gerardo Horvilleur, Jorge Vargas, Elmer Garduno and Alessandro Falappa. jrMan is available under the GNU General Public License (GPL)
rtrace is used by other tools, and can even be used to render images on its own by using the vwray program to generate view rays to be piped to it. dayfact is an interactive script to compute luminance values and daylight factors on a grid. findglare takes an image or scene and finds bright sources that would cause discomforting glare in human ...
As Pixar's technical specification for a standard communications protocol (or interface) between modeling programs and rendering programs capable of producing photorealistic-quality images, RISpec is a similar concept to PostScript but for describing 3D scenes rather than 2D page layouts.