TAILIEUCHUNG - PHOTOSHOP CS4 QuickSteps- P3

PHOTOSHOP CS4 QuickSteps- P3: QuickSteps books are recipe books for computer users. They answer the question “How do I.?” by providing quick sets of steps to accomplish the most common tasks in a particular program. The sets of steps are the central focus of the book. QuickSteps sidebars show you how to quickly do many small functions or tasks that support the primary functions. Notes, Tips, and Cautions augment the steps, yet they are presented in such a manner as to not interrupt the fl ow of the steps | 10 9876543 1 In the Black And White dialog box click the Preset drop-down arrow and choose a filter and then mix the channels so that they give you the effect you want. You get a much better looking image than you do when traveling directly from RGB Color mode to Grayscale mode. The added benefit is that the image is still in RGB Color mode which means not only that you ll save on the black cartridge when you print to inkjet your inkjet printer will use all the cartridges and not just the black one but you can also add RGB color images to this apparently grayscale photo to create stunning visual effects using Photoshop layers. CONVERT AN RGB IMAGE TO INDEXED COLOR MODE 1. From the Application bar click Image Mode Indexed Color. The Indexed Color dialog box appears. 2. In the Colors text box type a number between 2 and 256 to set the number of colors to be used. Photoshop shows you a preview of the image as it appears when converted to that number of colors. 3. Choose the type of dithering you want Photoshop to use. Generally for photos Diffusion type produces the most eye-pleasing color reduction. 4. Click OK to accept the conversion. Use Scanners and Digital Cameras TIP Scan the photograph using at least the resolution at which it will be displayed. The standard for displaying on a computer monitor is 72 dpi. If the photo will be printed scan at the same resolution as will be used when it is printed for example 300 dpi . Scanning at a higher resolution is acceptable scanning at a lower resolution is not. Even so more than 300 ppi is usually unnecessary unless you re planning to print an enlarged version of the original material. Photoshop allows you to import images directly from scanners and digital cameras connected to your computer. Scan an Image in Photoshop To scan an image from within Photoshop 1. Make certain the drivers are installed for your scanning hardware the disc that came with your scanner will serve you well but it s usually better to download the

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