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Tài iệu Photoshop cs5 by Dayley part 125

Tạo hình ảnh cho Web và các thiết bị di động lthough Photoshop không thường nghĩ đến như một công cụ được sử dụng cho việc tạo các trang Web, Photoshop có một số tính năng mạnh mẽ mà có thể trợ giúp thiết kế đồ họa trong việc chuẩn bị hình ảnh cho các ứng dụng Web | CHAPTER Creating Images for the Web and Mobile Devices Although Photoshop is not typically thought of as a tool used for creating Web pages Photoshop does have some powerful features that can aid graphic designers in preparing images for Web applications. One of the biggest obstacles to overcome when preparing images for the Web is adjusting the size and file format to support the limited capabilities of Web browsers. That s where Photoshop comes in. This chapter discusses some of the basics of how and why images are prepared for viewing on the Web such as color settings slicing images and adding transparency and animation. We also discuss the Save for Web Devices utility to prepare and output images in formats that are supported on the Web with the necessary supporting HTML data. Preparing Images for the Web You can prepare images for use on the Web in many ways. Web browsers support only a limited number of file formats so images must be converted to one of these formats. You also likely need to resize images to reduce them to reasonable sizes that can be supported by the limited network bandwidth. The following sections cover the basic Web formats how to use color management to ensure consistency between browsers adding animation to images and adding transparency to make images flow better with Web page backgrounds. IN THIS CHAPTER Preparing images for the Web Slicing images to enable hot spots Adding transparency to Web images Adding animated images to Web pages Converting images to Web formats Adding zoomable images to Web pages 923 Part IX Advanced Output Techniques Understanding Web image formats One of the most basic decisions that you face when preparing images for the Web is the file format of the image. You should decide on the file format before you make too many changes to the image because they vary in color and transparency support. The following list describes the most common file formats used for the Web Cross-Ref For more information about .