tailieunhanh - Photoshop CS4 for Dummies phần 5

Các tab Chia Toning thường được sử dụng kết hợp với Convert to Grayscale lựa chọn trong các tab Basic và HSL / Grayscale. (Mặc dù bạn có thể sử dụng nó để điều chỉnh điểm sáng hay bóng tối, bạn thường sẽ loại bỏ hoặc giới thiệu một dàn diễn viên màu sắc trong tab Basic với nhiệt độ và thanh trượt Tint.) | Chapter 7 The Adnhe Camera Raw Plug-In 153 The Split Toning tab is generally used in conjunction with the Convert to Grayscale options in the Basic and HSL Grayscale tabs. Although you can use it to make adjustments to highlights or shadows you would generally remove or introduce a color cast in the Basic tab with the Temperature and Tint sliders. Think of split toning as creating a sepia or Duotone version of an image. As you can see in Figure 7-16 you have separate controls for adjusting the highlights and shadows. Select a different hue for each and adjust the saturation independently. The Balance slider allows you to control what part of the tonal range is considered highlight or shadow. To create a sepia effect start with a value of 40 in both of the Highlights fields and perhaps 30 for Balance. Use a Shadow saturation value of 0 and because saturation is set to 0 it doesn t matter what value you select for the Hue slider . Remember too that you can select the same hue for both Highlights and Shadows to create a monochrome effect. Figure 7-16 A photo of a bland building in front of an overcast sky is improved with split toning. Compensating with Lens Correction Use the Lens tab s controls as shown in Figure 7-17 to compensate for certain undesirable characteristics of your lens. Zoom in on an area of angled lines in an image perhaps tree branches in front of a bright sky and look for colorful halos or fringes along edges. Use the Chromatic Aberration 154 Part II Easy Enhancements for Digital Images sliders to minimize the fringe. Be patient and careful often there will be one precise pair of settings that eliminates the problem. And keep in mind that while refraction of light through water or ice isn t the same as chromatic aberration these sliders are sometimes helpful in minimizing those colored halos as well. Use the Vignetting sliders to eliminate darkness around the edges of the image or perhaps to introduce either darkness or lightness as a special .