as-Images for the Web

as-Images for the Web - Web GIF(Graphic Exchange Format The...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
Today’s Date Types of Images for the Web Computer image files can be very large. For example, a three-inch square image suitable for printing in a book can be up to three megabytes in size. Fortunately, there are ways to compress image files. This is important because most people access Web pages over a modem line, and modems are relatively slow when downloading large image files. For example, a three-megabyte file would take about 14 minutes to download over a 28.8K modem connection. If the same file were compressed, it might take just one or two seconds to download. There are two file formats that are most popular for displaying images on the
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Web: GIF (Graphic Exchange Format) The GIF format compresses a file by examining the image for consistent patterns and then rewriting the digital image to a shorthand based on those repeated patterns, reducing the number of colors used to display the picture. The GIF format can compress images by about 4:1. JPG (Joint Photographic Experts Group) JPEG format compresses a file by tossing out subtle color differences in the image that human eyes are less likely to recognize. Depending on the level of image quality you require, JPEG can accomplish compression ratios between 10:1 and 100:1...
View Full Document

This note was uploaded on 06/06/2010 for the course IT 1203 taught by Professor Saut during the Spring '10 term at Art Institute of Atlanta.

Ask a homework question - tutors are online