## 15. Web Filters

### 15.1. Introduction

Web filters are mostly used on images intended for web sites. The filter Image Map is used to add clickable “hot spots” on the image. The filter Semi-Flatten is used to simulate semi-transparency in image formats without alpha channel.

This category describes the following filters:

- Section 15.2, “Image Map”

- Section 15.3, “Semi-Flatten”

14.29. Spyrogimp |  | 15.2. Image Map

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