3d Wallpapers - in computer science, image processing for desktop operating systems in the graphic.
The term "wallpaper" and "desktop picture" refers to the image used as a background computer screen, usually desktop graphical user interface. The term "3d wallpapers" used by the operating system Microsoft Windows, while the Mac OS in the system they are called "desktop picture" (prior to the onset of Mac OS X used the term "desktop pattern", which was a small ornament, repeated throughout the area of space desktop).

Formats
The images used as desktop 3d wallpaper, are usually raster, their size is the resolution of the screen (for example, the 1024 × 768 or 1280 × 1024 pixels) that allows the screen to fill all space. Most of the screen permits in proportion, thus scaled images, filling the space with any screen resolution, without distortion, although this affects the quality scale. Some systems such as Mac OS (version 8.6 and above), KDE (version 3.4 and higher) and GNOME support the use of wallpaper in a vector format (PICT for Mac, SVG in KDE and GNOME). This is an advantage, since a file can be used for screens of different sizes, as well as stretch for several screens, without loss of quality.

Sometimes there are double the size of wallpaper horizontally (such as 2560 × 1024) to display at the multiplex computers, where the image fills two desktop monitors.
The most common formats used PNG and JPEG.

History
For the first time distinguishing background under Superimposed box office appeared in an experimental system Officetalk, developed by Xerox PARC research center in 1975 for a computer Alto. Prior to that white background under Superimposed window (for example, in Smalltalk), it was difficult to distinguish from the content of the window. The color pattern used in Officetalk, was 25% - by the grey and consisted of a height of 2 points pixel, thus avoiding Flashing line computer monitor Alto. The same pattern was taken for a computer Xerox Star.

The company Apple has used such a grey background for computers Lisa and Macintosh. However, these computers were not equipped with a lowercase monitors, it was possible to use less notable for the background pattern, which represented a tile 2x2 pixel size, flooded 50 - per cent grey. The appearance of colour monitors for personal computers gave rise besshablonnyh monochrome background, and then wallpaper and arbitrary.

Types
The existence of many types of 3D wallpapers for desktop allows everyone to find something that meets their preferences. This may be photographs, drawings, 3D-graphics, or abstraction.

Among the major include the following categories: nature, animals, cars, anime, movies, video games, celebrities, erotic.

Easiest when wallpapers are clean sites that will easily distinguish icons.

The popularity of desktop wallpaper has caused the emergence of special programs that automate and simplify replace the image on the monitor screen. In this picture may be chosen in the order queue or randomly, as well as through a specified period of time.