Wallpaper

Computer Wallpaper or desktop picture refer to an image used as a background on a computer screen, usually for the desktop of a graphical user interface. Wallpaper is the term used in Microsoft Windows, while the Mac OS calls it a desktop picture. Prior to Mac OS X, the term desktop pattern was used to refer to a small pattern that was repeated to fill the screen.

    Images used as computer wallpaper are usually raster graphics with the same size as the display resolution (for example 1024×768 pixels, or 1280×1024 pixels) in order to fill the whole background.

    PNG and JPEG image formats are common for wallpaper. Some desktop systems, such as Mac OS , KDE , and GNOME, support vector wallpapers. This has the advantage that a single file may be used for screens of any size, or stretched across several screens, without loss of quality. Most display systems are capable of specifying a single color to use as the background in place of a wallpaper.