PNG news

Previous Topic Next Topic
classic Classic list List threaded Threaded
1 message Options
Reply | Threaded
Open this post in threaded view

PNG news


Dear Friends,


Is this group still active? There were no replies to my previous message, and I suppose there are some spam messages in the list for August 2009. And nobody cares.

It is rather strange.

Anyway, in the Internet I have found a very interesting comparison of three main formats: PNG, GIF and JPG. The pros and cons of every format will help you to choose your own solution.

GIF format:

-          256 indexed colors only. This is not very good for photographs

-          Animations (multiple images per file). These are often called “Animated GIF”.

-          One color can be defined as transparent (no alpha channel)

-          Lossless compression (well suited for screen shots and editing)

PNG format:

-          24 or 48 bit truecolor (256 indexed colors, too)

-          No animations (only one image per file)

-          Alpha channel for transparency (much more flexible than single color transparency)

-          Lossless compression (well suited for screen shots and editing, but larger files than JPG)

JPG format:

-          24 truecolor

-          No animations (only one image per file)

-          No transparency

-          Lossy compression (small files but not suitable for screen shots or editing)

The comparison was provided by Helge Klein. To read the whole article, please visit


Sally Catlett                             Astra Design Company

[hidden email]