Additionally, the shell contains significant advancements in the visualization of files on a computer. Previous versions of the Windows Shell would display thumbnails to represent different files on your computer. In windows vista wallpaper the thumbnail concept is taken further by overlaying different imagery to communicate more information about the particular file such as a picture frame around the thumbnail of an image file, or a filmstrip on a video file. windows vista wallpaper helps the user identify the file easily by more intelligently generating the thumbnails. Using algorithmic analysis, images are cropped around their likely subject, and interesting key frames are automatically chosen from a images file. Also, the ability to zoom the thumbnails in the shell greatly increases their usefulness.