Learning Web Design Third Edition- P41:Everything you need to know to create professional web sites is right here. Learning Web Design starts from the beginning defining how the Web and web pages work and builds from there. By the end of the book, you'll have the skills to create multi-column CSS layouts with optimized graphic files, and you'll know how to get your pages up on the Web. | Test Yourself HBCHTT THIS SITE 8. Name three types of image the PNG format can store. 9. What is the difference between binary and alpha transparency 10. Pick the best graphic file format for each of the images in Figure 18-28. You should be able to make the decision just by looking at the images as they re printed here and explain your choice. Figure 18-28. Choose the best file format for each image. C E 386 Part IV Creating Web Graphics CHAPTER LEAN AND MEAN WEB GRAPHICS Because a web page is published over a network it needs to zip through the lines as little packets of data in order to reach the end user. It is fairly intuitive then that larger amounts of data will require a longer time to arrive. And guess which part of a standard web page packs the most bytes that s right the graphics. Thus is born the conflicted relationship with graphics on the Web. On the one hand images make a web page more interesting than text alone and the ability to display graphics is one of the factors contributing to the Web s success. On the other hand graphics also try the patience of surfers with slow Internet connections. The user can hang in there and wait turn graphics off in their browsers or simply surf somewhere else. This chapter covers the strategies and tools available for making web graphic files as small as possible a process known as optimizing while maintaining acceptable image quality. Maybe you re thinking Why bother Everyone has broadband these days right After you read the next section I think you ll be eager to learn the general and format-specific optimizing techniques that follow. If you re going to make web graphics why not do it like the pros IN THIS CHAPTER Why you should optimize your graphics General optimization strategies Optimizing GIFs Optimizing JPEGs Optimizing PNGs Optimizing to a target file size Why Optimize Despite the popularity of high-bandwidth connections dial-up modem connections still make up a significant percentage of web traffic 20 to
