tailieunhanh - Macromedia fireworks MX bible phần 5

Các tên thay thế cho hai điểm kiểm soát trong các đường cong Bezier là kiểm soát xử lý. Như tên của nó, bạn có thể lấy và thao tác xử lý kiểm soát. Bằng cách thay đổi vị trí của tay cầm điều khiển, bạn có thể điều chỉnh hình dạng của đường cong. Dưới đây là một vài hướng dẫn để di chuyển kiểm soát xử lý: ✦ | Chapter 12 Creating Live Effects and Filters 369 The Levels dialog box also includes a Histogram essentially a chart that reports the levels of dark middle and light tones in your image giving you a quick graphical representation of what might need to be fixed. The horizontal axis is dark to light from left to right. The vertical axis is a level from 0 to 255. To apply the Levels filter and modify the tonal range of an image follow these steps 1. Select the object that you want to modify. 2. Click the Add Effects button in the Effects section of the Property inspector and choose Adjust Color o Levels from the Add Effects menu. Fireworks displays the Levels dialog box as shown in Figure 12-8. Midtone Input Level box Shadow Input Level box Highlight Input Level box Histogra Shadow Input Level slider Midtone Input Level slider Highlight Input Level slider Shadow Output Level slider Highlight Output Level slider Figure 12-8 The Levels dialog box displays a Histogram of the light midtone and dark tones in your image. Tip 3. Check the Preview checkbox to view your changes as you make them in the document window. 4. Select which channels you want to modify from the Channels option list just Red just Green just Blue or RGB to modify all three. Modifying just the Red channel in an RGB image is similar to adjusting a color by increasing or decreasing the R value in the Color Mixer panel when it s set to RGB or Hexadecimal. 5. Modify the highlights and shadows in your image with the Highlight Midtone and Shadow Input Levels sliders or enter new values directly in the Highlight and Shadow Input Levels boxes. Highlights and shadows are specified from 0 to 255 whereas midtones are specified with being neutral or 50 percent gray. 370 Part III Achieving Effects Note The Shadow value can t be higher than the Highlight value and the Highlight value can t be lower than the shadow Value. 6. Use the Highlights and Shadows Output Levels sliders to adjust your image s overall .