Graphical Formats Information

PNG format - images

All important images on my Web pages are in PNG (Portable Network Graphics) format. This format uses lossless compression and preserves the original quality of images. Nowadays, as far as I know, PNG format is supported by all Web browsers. Lossless compression is not so effective as lossy compression of JPEG format and therefore the downloading of images may by slower than you are used to. That is why I made a lower quality version (JPEG format) for each page which needs more than 100 KB to download. If you have a slow Internet connection, you should better view these pages. The images degradation by lossy compression is often visible by careful comparing with the image original only, regardless it may cause changes, for example in coronal structures, which may be misinterpreted. For that reason, if you want to use any image for scientific purposes, download it in PNG format.

Color space

All images presented on my Web pages are in sRGB color space.

MNG format - animations

The majority of animation used in may Web pages are in the MNG (Multiple-image Network Graphics) format. This format gives better quality (16 M colors instead of 256) and better compression ratio than the animated GIF format. Nowadays, this format is supported natively by majority of Web browsers, for the others there exist easy to install freeware plug-ins.

Miloslav Druckmüller
Institute of Mathematics, Faculty of Mechanical Engineering
Brno University of Technology, Czech Republic
Page last update: 10.2.2010