<HTML> <HEAD> <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1"> <META NAME="GENERATOR" CONTENT="Mozilla/4.01 [en] (Win95; I) [Netscape]"> <TITLE>2. Scanning Concepts</TITLE> </HEAD> <BODY TEXT="#000000" BGCOLOR="#FFFFFF" BACKGROUND="../icon/body.jpg"> <CENTER><B><FONT FACE="arial"><FONT COLOR="#FF7D00"><FONT SIZE=+2>Chapter 2. Scanning Concepts</FONT></FONT></FONT></B></CENTER> <P><B><FONT FACE="arial">2.1 Basic Concept of Scanning.</FONT></B> <BR><A NAME="a"></A><FONT COLOR="#FF7F00">2.1.1 What Is Scanning ?</FONT> <BR><B><FONT SIZE=+1>Scanning</FONT></B> an image is like a copier copying an image, the major difference is that the output of the scanning is an electronic file which can be edited and stored by software. <P><A NAME="b"></A><FONT COLOR="#FF7F00">2.1.2 How does the scanner work?</FONT> <BR><B><FONT SIZE=+1>When</FONT></B> scanning, the scanner applies a light source to the image, the light is reflected back from the image into the <U><FONT COLOR="#000000"><A HREF="..\HTML\7.htm#c1">CCD (Couple-Charged Device)</A></FONT></U><FONT COLOR="#000099"> </FONT>where the varying levels of light are interpreted and digitized, the image is then reconstructed and displayed on your screen. <P><A NAME="c"></A><FONT COLOR="#FF7F00">2.1.3 How do you get the right image from the scanner?</FONT> <BR><FONT COLOR="#000000">Firstly, you should find the answers about the questions:</FONT> <UL> <LI> What is the scanned image for? For a document? For printing out? To be viewed on the screen or translated into text by OCR?</LI> <LI> What image editing software to use and what file formats it accept?</LI> <LI> What is the original image type and what scanned image type to apply?</LI> </UL> <A NAME="d"></A><FONT COLOR="#FF7F00">2.1.4 What can you do with a scanner?</FONT> <UL> <LI> Optical Character Recognition (OCR) - You can translate text-based image like fax into text which can be edited by word processor software.</LI> <LI> Enriching your presentation and document by adding images.</LI> <LI> Converting hard copy images or documents into a fax format for faxing.</LI> <LI> Adding scanned images to your e-mail and enriching your topics.</LI> </UL> </BODY> </HTML>