Photoshop CS2 All-in-One Desk Reference For Dummies- P18

Photoshop CS2 All-in-One Desk Reference For Dummies- P18:Barbara Obermeier is principal of Obermeier Design, a graphic design studioin Ventura, California. She’s the author of Photoshop Album For Dummies,coauthor of Adobe Master Class: Illustrator Illuminated, Photoshop 7 For Dummies,and Illustrator 10 For Dummies. She has contributed as coauthor, technicaleditor, or layout designer for numerous books. Barb also teaches computergraphics at Brooks Institute; the University of California, Santa Barbara; andVentura College....
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Photoshop CS2 All-in-One Desk Reference For Dummies- P18488 Masking Hair, Fur, and Other Wispy Thingscontinued It is best to start with the channel that contains the most contrast between what you want to select and what you don’t. If it’s a toss-up, go with the channel that makes selecting the difficult part of the image easiest (in my example, that’s the hair). In my example, I’m using the Blue channel. 3. Choose Duplicate Channel from the Channels palette pop-up menu. Name the channel mask and click OK. You’ve created an alpha channel for the mask, shown in the figure. Now you can edit the mask without harm- ing the original channel. 4. Choose Image➪Adjustments➪ Levels and boost the contrast in the image by adjusting the Input sliders for shadows, midtones, and highlights. If you need help using the Levels adjustment, see Book VIII, Chapter 1. 5. Select the person and his or her hair. You can do that one of two ways: By selecting the person. By selecting the background first and then inverting the selection. In a mask, traditionally white represents a selected area, black represents an unse- lected area, and gray represents a partially selected area. 6. Adjust the Levels settings by dragging your shadows, midtones, and highlights sliders so that the element you want to select is either all white or all black with a little gray in the wispy areas. In other words, you want to change most of the pixels in the image to either black or white. In my example, because my guy is darker than the background, I adjusted the con- trast to make the subject as black as I could while making the background lighter. You can see the result in the figure. Masking Hair, Fur, and Other Wispy Things 489 Book VI Chapter 3 Advanced Masking Getting Exact with Techniques7. If you think the edges of your image need to be accentuated, you can apply a High Pass filter (Filter➪Other➪High Pass) before you apply the Level adjustment. High Pass turns your overall image gray while leaving the edges white. Don’t use too low a radius value (start with a setting between 8 and 10) or complet- ing the mask can be too time-consuming.8. Refine the mask by selecting the Eraser tool and choosing Block Mode from the Options bar. The Block Eraser is a great tool for cleaning up masks. It allows you to paint inside the mask without creating any feathered edges.9. Press D for default colors. Remember the Eraser tool paints with the background color, so be sure you have the color you want before you drag. Press X to switch the foreground and background colors.10. Clean up your mask by painting with black and white, as shown in the figure. continued490 Masking Hair, Fur, and Other Wispy Thingscontinued Make sure to use short strokes so you can undo any mistakes you make. 11. Use the Zoom tool if you need to touch up the details. The Block Eraser tool has only one size, so you have to zoom in to paint thinner strokes and zoom out to erase a larger area. Remember to leave some gray around the wispy areas, as seen in the figure; otherwise, they may look chopped off. Take your time and be as accurate as you can. Patience makes a big difference. If you’re not sure what you need to paint on the mask and you want to refer to the color image, simply click the composite channel (either RGB or CMYK depending on your image) at the top of the Channels palette. Then click the mask channel again to ...