Chapter 15. Filters

Chapter 15. Filters
	Part III. Function Reference

Chapter 15. Filters

Table of Contents

1. Introduction

1.1. Preview

2. Blur Filters

2.1. Introduction
2.2. Blur
2.3. Gaussian Blur
2.4. Selective Gaussian Blur
2.5. Motion Blur
2.6. Pixelise
2.7. Tileable Blur

3. Color filters

3.1. Introduction
3.2. Adjust FG-BG
3.3. Alien Map 2
3.4. Two Colors Exchange
3.5. Colormap Rotation
3.6. Map Color Range
3.7. Sample Colorize
3.8. Gradient Map
3.9. Border Average
3.10. Channel Mixer
3.11. Colorcube Analysis
3.12. Colorify
3.13. Color to Alpha
3.14. Decompose
3.15. Compose
3.16. Filter Pack
3.17. Hot
3.18. Max RGB
3.19. Retinex
3.20. Semi-Flatten
3.21. Smooth Palette
3.22. Value Invert

4. Noise filters

4.1. Introduction
4.2. Hurl
4.3. Scatter RGB
4.4. Pick
4.5. Scatter HSV
4.6. Slur
4.7. Spread

5. Edge-Detect Filters

5.1. Introduction
5.2. Difference of Gaussians
5.3. Edge
5.4. Laplace
5.5. Neon
5.6. Sobel

6. Enhance Filters

6.1. Introduction
6.2. Deinterlace
6.3. Despeckle
6.4. Destripe
6.5. NL Filter
6.6. Sharpen
6.7. Unsharp Mask

7. Generic Filters

7.1. Introduction
7.2. Convolution Matrix
7.3. Dilate
7.4. Erode

8. Glass Effects Filters

8.1. Introduction
8.2. Apply Lens
8.3. Glass Tile

9. Light Effects filters

9.1. Introduction
9.2. FlareFX
9.3. Gflare
9.4. Lighting Effects
9.5. Sparkle
9.6. SuperNova

10. Distort filters

10.1. Introduction
10.2. Blinds
10.3. Curve Bend
10.4. Emboss
10.5. IWarp
10.6. Mosaic
10.7. Page Curl
10.8. Polar Coords
10.9. Ripple
10.10. Shift
10.11. Newsprint
10.12. Video
10.13. Value Propagate
10.14. Waves
10.15. Whirl and Pinch
10.16. Wind

11. Artistic filters

11.1. Introduction
11.2. Apply Canvas
11.3. Cartoon
11.4. Cubism
11.5. GIMPressionist
11.6. GIMPressionist - Orientation Map Editor
11.7. GIMPressionist - Size Map Editor
11.8. Oilify
11.9. Photocopy
11.10. Soft Glow

12. Map Filters

12.1. Introduction
12.2. Bump Map
12.3. Displace
12.4. Fractal Trace
12.5. Illusion
12.6. Make Seamless
12.7. Map Object
12.8. Paper Tile
12.9. Small Tiles
12.10. Tile
12.11. Warp
12.12. Van Gogh (LIC)

13. Rendering Filters

13.1. Introduction
13.2. Plasma
13.3. Solid Noise
13.4. Flame
13.5. IFS Compose
13.6. Diffraction Patterns
13.7. CML Explorer
13.8. Grid
13.9. Maze
13.10. Jigsaw
13.11. Qbist
13.12. Checkerboard
13.13. Sinus
13.14. Fractal Explorer
13.15. Gfig
13.16. Sphere Designer

14. Combine Filters

14.1. Introduction
14.2. Depth Merge
14.3. Film

15. Animation Filters

15.1. Optimize
15.2. Playback

16. Web Filters

16.1. ImageMap

1. Introduction

Revision History
Revision $Revision: 1984 $	2006-10-25	j.h

A filter is a special kind of tool designed to take an input layer or image, apply a mathematical algorithm to it, and return the input layer or image in a modified format. GIMP uses filters to achieve a variety of effects and those effects are discussed here.

The filters are divided into several categories:

Blur see Section 2, “ Blur Filters ”.
Colors see Section 3, “ Color filters ”.
Noise see Section 4, “ Noise filters ”.
Edge-Detect see Section 5, “ Edge-Detect Filters ”.
Enhance see Section 6, “ Enhance Filters ”.
Generic see Section 7, “ Generic Filters ”.
Glass Effects see Section 8, “ Glass Effects Filters ”.
Light Effects see Section 9, “ Light Effects filters ”.
Distorts see Section 10, “ Distort filters ”.
Artistic see Section 11, “ Artistic filters ”.
Map see Section 12, “ Map Filters ”.
Render see Section 13, “ Rendering Filters ”.
Web see Section 16, “ Web Filters ”.
Animation see Section 15, “ Animation Filters ”.
Combine see Section 14, “ Combine Filters ”.

1.1. Preview

Most filters have a Preview where changes in the image are displayed, in real time (if the “Preview” option is checked), before being applied to the image.

Figure 15.1. Preview submenu

Preview submenu

Right clicking on the Preview window opens a submenu which lets you set the Style and the Size of checks representing transparency.


12.4. Reset All Filters		2. Blur Filters