jpg files

Digital pictures consist of small square elements called pixels One of the most common file storage formats for pictures is the '.jpg', in most programs there is provision for setting the amount of compression Although pictures can be stored as quite small images, care must be taken to ensure that the compression is not taken too far In heavily compressed .jpg files the 'blocking' effect becomes very apparent In each of these 3 pictures the pixel count is 200x200 - but the perceived quality varies

pixels showing as sawtooth on edge of gold roof in detail of original	'blocking' caused by severe .jpg compression to produce small file size	optimised file using sophisticated utility for web pages
23kb	5kb	5kb !

At the we use '.jpg' for web pages, e-mail and at low compression for printing pictures with a small final size

Take a look at the output page and how many on a CD-ROM