11.39. Max RGB
| 11. The Colors Menu |

### 11.39. Max RGB

Revision History
Revision $Revision: 2442 $ | 2007-10-21 | ude

#### 11.39.1. Overview

Figure 15.203. Example for the filter “Max RGB”

Original image

Filter “Max RGB” applied

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.

#### 11.39.2. Activate the filter

This filter is found in the image window menu under Colors → Max RGB.

#### 11.39.3. Options

Figure 15.204. “Max RGB” 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.

11.38. Hot |  | 11.40. Retinex