Chapter 6. Filters

Table of Contents

1. Filter introduction
2. Blur filters
2.1. Blur filters introduction
2.2. Blur
2.3. Gaussian Blur (IIR)
2.4. Gaussian Blur (RLE)
2.5. Selective Gaussian Blur
2.6. Motion Blur
2.7. Pixelise
2.8. Tileable Blur
3. Color filters
3.1. Color filters introduction
3.2. Adjust FG-BG
3.3. Alien Map
3.4. Alien Map 2
3.5. Two Colors Exchange
3.6. Colormap Rotation
3.7. Map Color Range
3.8. Sample Colorize
3.9. Gradient Map
3.10. Border Average
3.11. Channel Mixer
3.12. Color Cube Analysis
3.13. Colorify
3.14. Color to Alpha
3.15. Compose
3.16. Decompose
3.17. Filter Pack
3.18. Hot
3.19. Max RGB
3.20. Semi-Flatten
3.21. Smooth Palette
3.22. Value invert
4. Noise filters
4.1. Noise filters introduction
4.2. Hurl
4.3. Noisify
4.4. Pick
4.5. Scatter HSV
4.6. Slur
4.7. Spread
5. Edge-detect filters
5.1. Edge-detect introduction
5.2. Edge
5.3. Laplace
5.4. Sobel
6. Enhance filters
6.1. Enhance filters 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. Generic filters introduction
7.2. Convolution matrix
7.3. Dilate
7.4. Erode
8. Glass Effects filters
8.1. Glass Effects filters introduction
8.2. Apply Lens
8.3. Glass Tile
9. Light Effects filters
9.1. Light Effects filters introduction
9.2. FlareFX
9.3. Gflare
9.4. Lighting Effects
9.5. Sparkle
9.6. SuperNova

1. Filter introduction

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. The GIMP uses filters to achieve a variety of effects and those effects are discussed here.

The filters are divided into several categories:

  • Blur
  • Colors
  • Noise
  • Edge-Detect
  • Enhance
  • Generic
  • Glass Effects
  • Light Effects
  • Distorts
  • Artistic
  • Map
  • Render
  • Web
  • Animation
  • Combine