With the Color tools you can manipulate image colors in several ways:
Modify the color balance: 第 5.2 节 “色彩平衡”
Adjust hue, saturation and lightness levels: 第 5.3 节 “色调-饱和度”
Render into a greyscale image seen through a colored glass: 第 5.4 节 “单色化”
Adjust brightness and contrast levels: 第 5.5 节 “亮度-对比度”
Transform into a black and white image depending on pixel value: 第 5.6 节 “阈值”
Change the intensity range in a channel: 第 5.7 节 “色阶”
Change color, brightness, contrast or transparency in a sophisticated way: 第 5.8 节 “曲线”
Reduce the number of colors: 第 5.9 节 “色调分离”
Convert all colors to corresponding shades of gray: 第 5.10 节 “去色”
Except Desaturate and Posterize, color tools have presets: saved tool settings that you can retrieve later.
Three elements:
Presets: this drop-down list shows you the existing presets. Every time you change tool settings, a new preset is automatically saved, with date and hour; you must be aware of that, to preserve your computer memory.
The cross: clicking on this cross opens a window where you can save current settings under the name you want.
The small triangle: clicking on this triangle opens a small menu:
Three options:
Import settings from file
Export settings to file
Manage settings