tailieunhanh - Tài liệu Photoshop cs5 by Dayley part 61

Curves Các công cụ mạnh mẽ nhất Photoshop đã cho điều chỉnh màu sắc và ánh sáng là công cụ điều chỉnh Curves. Các công cụ điều chỉnh đường cong cung cấp một giao diện năng động và linh hoạt cho phép bạn thực hiện thay đổi sâu sắc với ánh sáng và màu sắc trong hình ảnh. Mặc dù các công cụ điều chỉnh đường cong mất một chút về thực hành và kiên nhẫn để tìm hiểu, sau khi bạn có hiệu quả với nó, bạn có thể làm thay đổi hình ảnh mà bạn có thể đã nghĩ. | Part IV Enhancing Correcting and Retouching Curves The most powerful tool Photoshop has for adjusting color and lighting is the Curves Adjustment tool. The Curves Adjustment tool provides a dynamic and flexible interface that allows you to make dramatic changes to the lighting and color in images. Although the Curves Adjustment tool takes a bit of practice and patience to learn after you are effective with it you can make changes in images that you may have thought were not possible. The Curves Adjustment tool can be accessed by selecting Image C Adjustments C Curves from the main menu or by selecting a Curves adjustment in the Adjustments panel. This section discusses how to configure and use the Curves Adjustment tool to make changes to the color lighting and contrast in your images as well how to configure and use the Auto Curves Adjustment. Cross-Ref The concept of using curves to adjust color channel levels was introduced in Chapter 4. You should read that chapter before reading this section because you need to understand the concepts from Chapter 4 to get the most out of using the Curves tool. Using the Curves Adjustment tool The best way to use the Curves Adjustment tool is to add a Curves Adjustment layer to the image by selecting the Curves tool in the Adjustments panel. This loads the Curves Adjustment layer tool shown in Figure . The Curves Adjustment tool allows you to make adjustments to the composite channel or any single color channel using the following controls Presets This allows you to select one of Photoshop s predefined presets or one of your own saved ones. You can save the settings you make in the Curves tool as a preset by selecting the Save Curves Preset from the Adjustments Panel menu. Photoshop provides the following predefined adjustments to quickly adjust the levels of images Default Color Negative Cross Process Darker Increase Contrast Lighter Linear Contrast Medium Contrast Negative Strong Contrast and Custom. Color channel This