TAILIEUCHUNG - How to Do Everything With Your Scanner- P43

How to Do Everything With Your Scanner- P43: My thanks to the terrifically creative and knowledgeable staff at Osborne, particularly acquisitions editor Megg Bonar and acquisitions coordinator Alissa Larson for their responsiveness and flexibility. Special thanks to technical editor Steve Bain, not only for his insight and attentiveness to accuracy, but also for actively coming up with many ideas for content. | 194 How to Do Everything with Your Scanner The actual adjustment process can be a bit tricky initially. For example if you decide your photo is a bit too green it s not quite as simple as merely adjusting the magenta-green slider. You have to adjust some of the other colors too. For example if you decrease the magenta-green level you actually have to increase the cyan-red and yellow-blue levels manually by half as much to keep all the colors in your photo in balance. Table 10-1 summarizes the adjustments you need to make to keep the colors of your photo in balance. Color Problem Adjustment Blue tone common with digital cameras Red tone can be the result of artificial lighting or improper chemical processing Green tone Decrease the blue then increase both the red and the green by half the amount you decreased the blue. Decrease the red then increase both the blue and the green by half the amount you decreased the red. Decrease the green then increase both the red and the blue by half the amount you decreased the green. TABLE 10-1 Color-Balancing Adjustments Adjusting Your Printer Tones Although your scanner and computer monitor use the red-green-blue primary color group to create images your printer uses a different scheme. Most color printers and professional printing presses apply dotted layers of cyan magenta yellow and black CMYK . If you find that your printed copies are off-color based on what appears on your monitor you can tweak them using the color correction filter. You should be aware however that CMYK can t precisely replicate the vibrant colors you see on your monitor. Printed images always appear a little duller than the ones on your computer screen. Adjusting the color tones of your printer to produce a particular image is a matter of trial and error and personal judgment. Since you can never exactly match what appears on screen you need to produce the colors in a way that appears representative and pleasing to your eye. Cyan magenta and yellow have .

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