8.56. Posterize

8.56.1. Overview

图 16.236. Example for the Posterize filter

Example for the “Posterize” filter

Original image

Example for the “Posterize” filter

Posterize with 3 levels applied

This tool is designed to intelligently weigh the pixel colors of the selection or active layer and reduce the number of colors while maintaining a semblance of the original image characteristics.

8.56.2. Activating the Filter

This filter is found in the main menu under ColorsPosterize….

8.56.3. Options

图 16.237. Posterize filter dialog

Posterize filter dialog


Presets are a common feature for several Colors commands. You can find its description in 第 8.1.1 节 “Colors Common Features”.

Posterize Levels

Here, level means number of colors per channel .

This slider and the input boxes with arrowheads allow you to set the number of levels (2-256) in each RGB channel that the tool uses to describe the active layer. The maximum total number of colors is the combination of these levels. A level to 3 will give 33 = 27 colors.

Blending Options, Preview and Split view

These are common features described in 第 8.1.1 节 “Colors Common Features”.