This document is written in generic terms, meaning that it's intended to describe the photo scanning process without assuming specific scanners or photo-editing software. To scan photos for use on a web page you need a scanner, and photo-editing software.
Most scanners come bundled with photo-editing software of some kind.
Pictures are sized in pixels. A PC screen operating in VGA mode is 640 pixels wide by 480 pixels tall. The image to the right is 141 X 141 pixels. Be conscious of the size of photos you include, as large graphics take a long time to load. Prescan then scan the photo .