### 8.47. Destripe

#### 8.47.1. Overview

It is used to remove vertical stripes caused by poor quality scanners. It works by adding a pattern that will interfere with the image, removing stripes if setting is good. This “negative” pattern is calculated from vertical elements of the image, so don't be surprised if you see stripes on the preview of an image that has none. And if pattern “strength”; is too high, your image will be striped.

If, after a first pass, a stripe persists, rectangular-select it and apply filter again (all other selection type may worsen the result).

#### 8.47.2. Activating the Filter

This filter is found in the main menu under Colors → Tone Mapping → Destripe….

#### 8.47.3. Options

Figure 16.206. “Destripe” filter options

Preview

  If checked, parameter setting results are interactively displayed in preview. Scroll bars allow you to move around the image.

Create histogram

  This “histogram ” is a black and white image showing the interference pattern more legibly.

Width

  Slider and input box allow to set “strength” of filter (2-100): more than 60 is rarely necessary and may create artifacts.

8.46. Stress |  | 8.48. Retinex

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