What’s the difference between Raster and Vector images?
On a computer monitor, images are nothing more than various colored pixels. Certain kinds of image file formats record images literally in terms of the pixels to display. These are Raster Images, and you can edit them only by altering the pixels directly with a bitmap editor. Photoshop and Paint Shop Pro are two of the most popular bitmap editors. Vector Image files record images descriptively, in terms of geometric shapes. These shapes are converted to bitmaps for display on the monitor. Vector images are easier to modify, because the components can be moved, resized, rotated, or deleted independently. PostScript is a popular vector format for printing.