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Tài liệu Photoshop cs5 by Dayley part 18

Chỉnh sửa hình ảnh trong Photoshop được thực hiện bằng cách áp dụng một loạt các điều chỉnh để sửa đổi các điểm ảnh gốc trong hình ảnh. Mỗi điều chỉnh xây dựng trên những người khác cho đến khi bạn đạt được kết quả mong muốn. Photoshop cung cấp hai tính năng mạnh mẽ cho phép bạn có hiệu quả hơn bằng cách sử dụng và thao tác các bộ điều chỉnh làm cho hình ảnh | CHAPTER History and Actions Editing images in Photoshop is done by applying a series of adjustments to modify the original pixels in the image. Each adjustment builds on the others until you achieve the desired results. Photoshop provides two powerful features that allow you to be more productive by utilizing and manipulating the sets of adjustments made to images. The history feature tracks each change to the individual image. This allows you to have a record of each state of the image during editing. Photoshop provides several highly useful tools that allow you to make dynamic adjustments to the image by manipulating the history states. These tools also allow you to play around with different techniques because you can quickly revert back to previous states or remove adjustments that do not work well. The actions feature allows you to bundle a set of adjustments as an individual action. You can save actions to a file and then use them in other images. This feature saves lots of time when you are performing similar adjustments to images. IN THIS CHAPTER Understanding the nondestructive nature of Photoshop Using the History panel to manipulate past adjustments Using the history of edits to paint out changes Using Photoshop s built-in action to save time Creating custom actions Photoshop The Non-Destructive Application One of the most powerful features of Photoshop is the ability to make numerous edits to images and see the effects of those edits without destroying the underlying pixel data or previous edits. Many of the edits done to images in Photoshop are the result of a series of adjustments using a variety of tools. Each adjustment builds on another until the end result is reached. 131 Part I Getting Started with Adobe Photoshop CS5 Unfortunately it is not an exact science and you have to try different adjustments until you find a combination that culminates in the desired outcome. The non-destructive nature of Photoshop allows you to freely play around with .