TAILIEUCHUNG - Professional Information Technology-Programming Book part 29

Tham khảo tài liệu 'professional information technology-programming book part 29', công nghệ thông tin, kỹ thuật lập trình phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Chapter 7. Making Targeted Adjustments There s not a big difference in the procedure for making adjustments when you re making targeted adjustments. The difference is primarily in how you adjust a specific area without losing or jeopardizing the totally nondestructive work that you ve done up to this point. Much of the success of regional adjustments depends on your ability to make the mask that restricts your adjustments to one or more very specific areas of the image. Of course you could make an adjustment directly onto the image by using any of the adjustment commands after you d made a selection. But then that adjustment becomes a permanent part of the image destroying whatever was previously in that area. So you really want your selections to do one of two things Mask an adjustment layer so that it will only have an effect on targeted portions of the image. This is the option you should useexcept when it is impossible. Create a separate layer for adjustments that have no adjustment layer equivalent. Direct Your Adjustment to a Particular Spot This chapter isn t about how to make an adjustment. You learned about that in Chapter 6. It s about the various ways to aim those techniques at enhancing a particular part of the subject in such a way that those adjustments stay both intact and isolated. You ll also learn about making selections to create masks for those layers. And you ll learn a lot more about how to modify a layer mask to change the exact area and blending of a targeted adjustment. . Tips for Using Selections Of course a big part of targeting specific areas of the image for adjustment is knowing how to most effectively and credibly isolate that portion of the image. It s important that the isolated portion blend smoothly with the rest of the image so that your adjustments look natural in all respects. It s also important to make sure that the adjustment is accomplished in a nondestructive way. NOTE I assume you have some knowledge of Photoshop and .

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