tailieunhanh - Tài liệu Photoshop cs5 by Dayley part 58

Phần IV: Tăng cường, Sửa chữa, và Retouching Mật độ: Điều này cho phép bạn thiết lập mật độ của bộ lọc màu. Một mật độ thấp có tác dụng ít hơn vào hình ảnh, nhưng nếu bạn sử dụng một mật độ quá cao, bạn bắt đầu mất chi tiết. Preserve Luminosity: Bạn có thể xác định liệu có nên duy trì độ sáng, thường là ý tưởng tốt nhất. Lực lượng bảo quản độ sáng điều chỉnh bộ lọc để thay đổi sao cho độ sáng được giữ nguyên. . | Part IV Enhancing Correcting and Retouching Density This allows you to set the density of the color filter. A lower density has less effect on the image but if you use too high a density you begin to lose detail. Preserve Luminosity You can specify whether to preserve the luminosity which typically is the best idea. Preserving the luminosity forces the filter adjustments to change such that the luminosity stays the same. FIGURE Using the Photo Filter Adjustment tool you can simulate the effect that using a color lens filter would have had when the photo was taken. You also can tweak the density and color of the filter. Replacing specific colors Photoshop allows you to selectively replace an individual color in an image with another color. This allows you to adjust the tone of a specific color range or even replace it with another set of colors. For example you can replace a dull blue with a brighter blue or even bright yellow without changing the other colors in the image. The Replace Color Adjustment dialog box shown in Figure allows you to select a specific color and the tones around it and then select a replacement color. The replacement color is applied to the image replacing the original color tones without affecting any other colors. 394 Chapter 13 Lighting and Color Adjustments FIGURE Using the Replace Color tool you can replace specific colors in an image. Selection view Eyedroppers The Replace Color Adjustment tool allows you to adjust the following settings Localized Color Clusters This specifies whether to select only color clusters that are contiguous to each other. Using this option makes color selection a bit more accurate when the color is localized to one area of the image. However if the color is spread throughout the image do not use this option. Eyedroppers The eyedroppers allow you to select colors from the image. The plus dropper adds to the selection the minus dropper removes the color from the selection. The adjusted .