3.13. Tileable Blur

3.13.1. Overview

图 17.34. Example for the “Tileable” filter

Example for the “Tileable” filter

Original

Example for the “Tileable” filter

Filter “Tileable Blur” applied

This filter is a script-fu and not GEGL-based.

This filter is used to soften tile seams in images used in tiled backgrounds. It does this by blending and blurring the boundary between images that will be next to each other after tiling.

[提示]提示

If you want to treat only images borders, you can’t apply filter to the whole image. The solution to get the wanted effect is as follows:

  1. Duplicate layer (Layer → Duplicate Layer) and select it to work on it.

  2. Apply “Tileable Blur” filter with a 20 pixels radius to this layer.

  3. Select all (Ctrl+A) and reduce selection (Selection → Shrink) to create a border with the wanted width.

  4. Give a feathered border to the selection by using Selection → Feather.

  5. Delete selection with Ctrl+K.

  6. Merge layers with Layer → Merge down.

3.13.2. Activate the filter

You can find this filter in the image menu under Filters → Blur → Tileable Blur….

3.13.3. Options

图 17.35. “Tileable Blur” filter options

“Tileable Blur” filter options

Radius

The bigger the radius, the more marked is the blur. By selecting Horizontal and Vertical, you can make the horizontal and vertical borders tileable.

Blur vertically, Blur horizontally

These options are self-explanatory.

Blur type

Choose the algorithm to be applied:

  • IIR

    for photographic or scanned images.

    RLE

    for computer-generated images.