What is image optimization?
Optimization is the process by which the file size of an image is reduced to a minimum without changing (much!) the look of the graphic. GIF and JPEG are the two popular image formats on the web and optimizing the two involves using different techniques.
In this set of four articles we will learn how to optimize Gif images. Details on how to optimize JPEG images can be found in the Optimizing JPGs article.
Why do we need to optimize web graphics?
Optimizing web graphics is of prime importance. If you are a web designer you will appreciate that smaller file sizes result in faster downloads that presents the web page quickly to the user. If a web page takes "ages" to load, the visitor will be frustrated and quickly close the browser window or click on the browser Back button.
Gif Optimization
If you want to take full advantage of Gif optimization articles and really want to cut down the sizes of those images, I suggest you first read a little on the Gif compression algorithm and anti-aliasing. All other details regarding Gifs will be presented as we go along.
To optimize Gifs, we need to understand the different factors that affect the file size of the Gif image. These are:
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