図14.138 The Color tools in the Tools menu
Access to the Color tools through the 「classical」 Tools menu.
With the Color tools you can manipulate image colors in several ways:
Modify the color balance: 「Color Balance」
Adjust hue, saturation and lightness levels: 「Hue-Saturation」
Render into a greyscale image seen through a colored glass: 「Colorize」
Adjust brightness and contrast levels: 「Brightness-Contrast」
Transform into a black and white image depending on pixel value: 「Threshold」
Change the intensity range in a channel: 「Levels」
Change color, brightness, contrast or transparency in a sophisticated way: 「Curves」
Reduce the number of colors: 「Posterize」
Convert all colors to corresponding shades of gray: 「Desaturate」
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