8.57. Posterize
| 8. The “Colors” Menu |

### 8.57. Posterize

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.

#### 8.57.1. Activating the filter

You can find this command through Colors → Posterize…

#### 8.57.2. Options

شكل 16.257. Posterize filter dialog

Presets

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

#### 8.57.3. Example

Original image. A Colorcube Analysis of the original image shows a great number of colors.

Original image posterized in 3 levels. The Colorcube Analysis shows 11 colors (less than the possible number 27).

8.56. Colorize |  | 8.58. Color to Alpha…

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