3.18. Max RGB
| 3. Color filters |

### 3.18. Max RGB

Revision History
Revision $Revision: 1711 $ | 2006-11-12 | j.h

#### 3.18.1. Overview

Figure 16.59. From left to right: original image, after applying MaxRGB filter

You can find this filter through Filters → Colors → Max RGB.

For every pixel of the image, this filter holds the channel with the maximal / minimal intensity. The result is an image with only three colors, red, green and blue, and possibly pure gray.

#### 3.18.2. Options

Preview

  This preview displays, in real time, the resulting image after treatment by filter.

Parameter Settings

  Hold the maximal channels: For every pixel, the filter keeps intensity of the RGB color channel which has the maximal intensity and reduces other both to zero. For example: 220, 158, 175 max--> 220, 0, 0. If two channels have same intensity, both are held: 210, 54, 210 max--> 210, 0, 210.

  Hold the minimal channels: For every pixel, the filter keeps intensity of the RGB color channel which has the minimal intensity and reduce both others to zero. For example: 220, 158, 175 min--> 0, 158, 0. If two minimal channels have same intensity, both are held: 210, 54, 54 min--> 0, 54, 54.

  Grey levels are not changed since light intensity is the same in all three channels.

3.17. Hot |  | 3.19. Retinex