Scanners come in a variety of makes and models. Scanners are usually bundled with an application that can be used for capturing digital images and saving them as files. These are stand-alone programs that are used in conjunction with the scanner. Another approach is to acquire the image using the all-purpose image processing program, like Photoshop. Most scanners have a special plug-in that allows you to acquire images directly as Photoshop documents.
Web pages employ digital images for a variety of uses.
Photos and graphics enhance the page by giving it visual impact. In addition, images are often employed for text banners, icons, buttons, and the like. To be posted on a web page, a digital image must conform to one of several image file types. These images are usually very compact in file size. They achieve this in two ways.