Chapter 17. Filters

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

The filters are divided into several categories:

• Section 3, “Blur Filters”

• Section 4, “Enhance Filters”

• Section 5, “Distort Filters”

• Section 6, “Light and Shadow Filters”

• Section 7, “Noise Filters”

• Section 8, “Edge-Detect Filters”

• Section 9, “Generic Filters”

• Section 10, “Combine Filters”

• Section 11, “Artistic Filters”

• Section 12, “Decor Filters”

• Section 13, “Map Filters”

• Section 14, “Rendering Filters”

• Section 15, “Web Filters”

• Section 16, “Animation Filters”