You will need Adobe Acrobat Reader to view this file. For your free copy click here . There are two types of graphic files, bitmaps and vectors . Since a bitmap's resolution is fixed, printing a bitmap at a larger size results in a loss of resolution. Vector graphic files define an image as lines and curves and can be scaled up or down with little or no loss of definition.
Scanned images are always bitmaps.
Drawing programs, such as Illustrator, Corel Draw, usually produce vector files. Presentation programs, such as PowerPoint produce vector files. In all cases, hard copy of images must be submitted along with the electronic version. Thus printer resolution, toner quantity, and even paper quality can affect the final result. Photo images may be supplied as photographs, slides, or transparencies.