tailieunhanh - Tài iệu Photoshop cs5 by Dayley part 73

Vẽ tranh với các công cụ chỉnh sửa Chỉnh sửa công cụ vẽ bằng cách sử dụng các thuật toán khác nhau để thao tác các điểm ảnh trong một vùng cụ thể theo công cụ này thay vì các màu đặt xuống mới. Những công cụ này cho phép bạn kiểm soát các hình dạng và kích thước của khu vực của điểm ảnh bị ảnh hưởng bởi công cụ. | Part V Painting Paths Shapes and Text Tolerance This specifies the tolerance to use when determining whether a pixel matches the sample color and should be replaced. Anti-alias When this option is selected Photoshop uses anti-aliasing to soften the edges around the pixels being replaced. Mixer Brush tool The Mixer Brush tool is a bit different from the Painting tools and is covered in a later section in this chapter. Figure shows an example of using the Color Replacement tool to paint a different color onto a flower. Notice that only the petals of the flower are affected. We used the Sampling options to sample a petal so only the pixels that are similar to the color of the petals are altered leaving the others alone. FIGURE The Color Replacement tool allows you to use brush strokes to paint over a specific color while leaving the other colors alone. Painting with editing tools Editing tools paint by using different algorithms to manipulate the pixels in a specific region under the tool instead of the laying down a new color. These tools allow you to control the shape and the size of the area of pixels affected by the tool. Pixels are manipulated by dragging the mouse or using a stylus pen. The editing tools allow you to fix or enhance problems spots in images. For example you can use the Spot Healing Brush tool to remove blemishes or the Sharpen tool to enhance the sharpness of a specific area of a photo. 510 Chapter 16 Painting and Brushes The following sections discuss the editing tools that you use to paint edits on photos in Photoshop. Healing tools The Healing tools shown in Figure allow you to quickly fix problem areas of photos such as scratches red-eye or even the removal of unwanted objects. These tools are covered in detail in Chapter 15 so we don t cover them here. Cross-Ref For a more detailed explanation of how to use the Healing tools to edit photos see Chapter 15. FIGURE The Healing tools allow you to use brush strokes to quickly