Thêm một kết cấu hạt Trong thế giới của bộ phim cổ truyền thống, tốc độ nhanh hơn, lớn hơn và rõ ràng hơn các hạt. Bằng cách sử dụng các điều khiển hạt trong Camera Raw, bạn có thể mô phỏng các kết cấu này grainy. Chọn một hình ảnh đó sẽ không bị ảnh hưởng về mặt thẩm mỹ khi chi tiết của nó bị mất định nghĩa. | 78 Chapter 4 Adding a grain texture In the world of traditional film stock the faster the speed the larger and more apparent the grain. By using the Grain controls in Camera Raw you can simulate this grainy texture. Pick a photo that won t suffer aesthetically when its details lose definition. To add a grain texture to a photo 1. Click the Effects tab and double-click the Hand tool O to fit the image in the preview. A 2. Under Grain to control the amount of grain applied choose an Amount value of around 50 to make the grain noticeable. 3. To emulate the fine grain of a slow film speed or the coarser grain of fast film speed do as follows Raise the Size value for the size of the grain particles. When this value is greater than 25 a small degree of blurring is also applied to help blend the grain with the imagery. Lower the Roughness value below the default value of 50 to produce a more uniform grain or raise it to produce an uneven coarse grain. C Zoom in to examine the grain then readjust the Amount value if needed. A This photo will be a good candidate for the Grain effect in Camera Raw because it contains soft muted colors and the details don t need to stay crisp. The first settings we chose were Grain Amount 50 and Size 80 the Roughness control was left at the default value of 50 . The food textures are starting to blend with the soft background. C We changed the Amount to 75 the Size to 60 and the Roughness to 65. The coarser grain increased Roughness further unifies the highlights and background with the food textures. Please pass the Parmesan. Camera Raw 79 Using the Adjustment Brush Unlike settings chosen in the Camera Raw tabs which apply to the overall photo the Adjustment Brush lets you apply local adjustments to specific areas. For example you could adjust the exposure brightness or color saturation of a few key details that you want to emphasize in a composition. You draw brush strokes in the preview to define which areas are to be adjusted then you .
