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the focal easy guide to photoshop cs 2 phần 5

Các công cụ Curves cung cấp một cách tốt để điều chỉnh độ tương phản hình ảnh toàn cầu. Nó cho phép cho độ tương phản cao trong nhạc chuông hình ảnh địa phương Tăng tương phản trong midtones flattens những điểm nổi bật và bóng tối dẫn đến một sự gia tăng toàn cầu trong tương phản hình ảnh. | THE IMAGE EDITING WORKFLOW Adjusting Image Contrast Curves Tool The Curves tool provides a good way to adjust global image contrast. It allows for increased contrast in localized image tones e.g. the midtones . Increased contrast in the midtones flattens the highlights and shadows resulting in a global increase in image contrast. In the Curves dialog place a point near the shadow end of the curve and drag it down to decrease contrast in the shadows. Then place a point near the highlight end of the curve and drag it up. Last place a point near the midtone and adjust it for best global tone. This produces a typical S-Curve. An inverse S-Curve produces a flattening of overall image contrast. More on Curves in Chapter 2 Foundation. More on editing contrast in Chapter 5 Advanced Options. 79 THE FOCAL EASY GUIDE TO PHOTOSHOP CS2 Adjusting Shadows Highlights Curves Tool The Curves tool is also great for increasing the detail in highlights and shadows. It s best to perform this adjustment separate from using Curves to increase contrast i.e. perform the separate adjustment tasks by creating two adjustment layers. In the Curves dialog first place a point at quarter tone midtone and three-quarter tone. This fixes the curve for most of the tonal image range and allows localized adjustment to the shadows only. Now place an additional point in the shadows and adjust it to bring out more detail. Create a separate adjustment layer to add highlight details. Options for using the Shadow Highlight tool are in Chapter 5 Advanced Options page 149 . 80 THE IMAGE EDITING WORKFLOW Color Balance Color Balance Tool The Color Balance tool is adequate for making large global image adjustments so go ahead and use it for Color Balance adjustment. Open the Color Balance dialog and adjust the color levels. Move the sliders for each color channel to get the image to a fairly neutral color balance. The Color Balance Tool only provides for basic control of global color balance. More details on the .