图像色彩的校正w

9.1.1 色阶
执行“图像”>“调整”>“色阶”命令或选取“图层”>“新建 调整图层”>“色阶”，在“新建图层”对话框中点按“确定”会 弹出“色阶”对话框。如图所示：
9.1.1 Color Level
Execute the "image"> "adjustment"> "Levels" command or select the "Layer"> "New Adjustment Layer"> "Levels" in the "New Layer" dialog box midpoint Click "OK" will pop up " Levels "dialog box. As shown:
图9-1-3
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Figure 9-1-3
9.1.2 自动色阶
自动色阶命令和“色阶”对话框中的“自动”按钮的功能相同， 可自动定义每个通道中最亮和最暗的像素作为白和黑，然后按比例 重新分配其间的像素值，如图9-1-4、图9-1-5 所示。
一般来说，此命令对调整简单的灰阶图比较适合。
9.1.2 Auto Color Level
Chapter9 Image color correction
本课要点
•正确使用各种色彩调节命令对图像进行调整，包括色阶、自动 色阶、自动对比度、自动颜色、曲线、色彩平衡、亮度/ 对比 度、色相/饱和度、去色、匹配颜色、替换颜色、可选颜色、通 道混合器、渐变映射、反相曝光度、色调均化、阈值、色调分 离和变化 •了解并掌握不同的色彩调节命令的特性和使用范围
Learning Point
•Correctly use = color adjustment commands to adjust the image, including Levels, Auto Levels, Auto Contrast, Auto Color, curve, color balance, brightness / contrast, hue / saturation to colors, matching colors, replace colors available Select the color, channel mixer, gradient mapping, inverse exposure, color equalization, threshold, color separation and change •Understand and master the different color characteristics of regulation and use of area command
图9-1-1
Figure 9-1-1
色阶对话框
图9-1-2
色阶对话框
Figure 9-1-2
自动颜色校正选项
当执行“ 图像> 调整> 色阶或曲线” 命令时，在弹出的对 话框中有一个“选项”，单击弹出“自动颜色校正选项。如图所 示图9-1-3。
Auto Color Correction Option
Auto Level command and the "Levels" dialog box "automatic" features the same button can be automatically defined for each channel of the brightest and darkest pixels as white and black, and then re-allocated in proportion during the pixel value Figure 9-1-4, as shown in Figure 9-1-5.
When execute the "Image> Adjustment> Levels or Curves" command, the dialog has a "Options", click the pop-up "automatic color correction options. As shown in Figure 9-1-3.
Corresponding test point
•Through the histogram to identify the color image or the scope of the current constituencies and the resulting need to adjust the image master image> adjust the menu of various commands and methods of the use of •Learn how to carry out the image of the tonal range of digital control •Master all the functions of options in automatic Color Correction dialog box •Skilled use the image size dialog box on the image size and resolution to amend •Skilled use cutting tools and commands of the image cut image cut
对应考点
•通过直方图来鉴别图像或当前选区的色调范围并由此而对图像进 行需要的调整掌握图像> 调整菜单下的各种命令的使用范围和方法 •掌握如何对图像的色调范围进行数字化的控制 •掌握自动颜色校正对话框中各选项的功能 •熟练使用图像大小对话框中各项对图片的尺寸和分辨率进行修改 •熟练使用裁剪工具和图像剪切命令对图像进行裁切
9.1 色阶
色彩校正在图像的修饰中是非常重要的一项内容，Photoshop 提 供了很多工具来改变色调和图像中的色彩平衡。
9.1 Color Level
Color correction in the image is very important modification of an element, Adobe Photoshop provides many tools to change the color and image color balance.