Tuesday, May 5, 2009

computer graphics

Raster graphic sprites left and mask devicecomputer graphics are the computer-based generation of digital imagesmostly from two dmensional models, such as geometric models, text, and digital images, and by techniques specific to them. The word may stand for the branch of computer science that comprises such techniques, or for the models themselves.computer graphics are mainly used in applications that were originally developed upon traditional printing and drawing technologies, such as typography, cartography, technical drawing, advertising, etc.


In those applications, the twodimensional image is not just a representation of a realworld object, but an independent artifact with added semantic value; twodimensional models are therefore preferred, because they give more direct control of the image than computer graphics, whose approach is more akin to photography than to typography.Pixel art is a form of digital art, created through the use of raster graphics software, where images are edited on the pixel level. Graphics in most old or relatively limited computerand video games, graphing calculator games, and many mobile phone games are mostly pixel art.



Example showing effect of vector graphics versus raster graphics.Vector graphics formats are complementary to raster graphics, which is the representation of images as an array of pixels, as it is typically used for the representation of photographic images. There are instances when working with vector tools and formats is best practice, and instances when working with raster tools and formats is best practice. There are times when both formats come together. An understanding of the advantages and limitations of each technology and the relationship between them is most likely to result in efficient and effective use of tools.

computer graphics in contrast to computer graphics are graphics that use a threedimensional representation of geometric data that is stored in the computer for the purposes of performing calculations and rendering images. Such images may be for later display or for real time viewing.Despite these differences, computer graphics rely on many of the same algorithms as computer vector graphics in the wire frame model and computer raster graphics in the final rendered display. In computer graphics software, the distinction between and is occasionally blurred applications may use techniques to achieve effects such as lighting, and primarily may use rendering techniques.

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