tailieunhanh - ADOBE INDESIGN CS2 REVEALED- P17

ADOBE INDESIGN CS2 REVEALED- P17:Welcome to Adobe InDesign CS2—Revealed. This book offers creative projects, concise instructions, and complete coverage of basic to advanced InDesign skills, helping you to create polished, professional-looking layouts. Use this book as you learn InDesign, and then use it later as your own reference guide. | LESSON 3 PLACE BITMAP GRAPHICS What You ll Do Miniature Pinscher Understanding Bitmap Graphics Bitmap graphics are created using a rectangular grid of colored squares called pixels. Because pixels a contraction of picture elements can render subtle gradations of tone they are the most common medium for continuous tone images what you perceive as a photograph on your computer. All scanned images are composed of pixels. All digital images are composed of pixels. Adobe Photoshop is the leading graphics application for working with digital photos. Figure 21 shows an example of a bitmap image. The enlarged section shows you the pixels that compose the image. The number of pixels in a given inch is referred to as the image s resolution. To be effective pixels must be small enough to create an image with the illusion of continuous tone. The important thing to remember about bitmap images is that any enlargement resizing the image to make it bigger essentially means that fewer pixels are available per inch. Think about it when In this lesson you will place bitmap graphics in InDesign and explore issues with resizing them. Choose your application wisely Always keep in mind that InDesign s primary role is as a layout application. Though you can draw vector graphics in InDesign its primary role is not that of a drawing program. Adobe Illustrator is primarily a drawing program. Similarly though you can place bitmap graphics in InDesign InDesign is not a photo manipulation application. Adobe Photoshop is a photo manipulation application. What this means is if you want to create a complex drawing create it in Illustrator. And if you want to manipulate a bitmap graphic especially if you want to enlarge a bitmap graphic do it in Adobe Photoshop not in Adobe InDesign. INDESIGN 6-18 Placing and Linking Graphics you enlarge an image the same number of pixels are spread out over a larger area thus fewer pixels per inch. This decrease in resolution will have a negative impact on the .