WPDFD Issue #10 - January 01, 1999

Smaller JPEG Files

by Ben Summers JPEG is rather more complicated than GIF, and it's useful to have a basic idea of how it works to get the best out of it. JPEGs are compressed in two stages. The first is lossy compression, which removes information from the image, and is why JPEGs never look quite the same as the original image. This stage splits the image data into three components, one of which is brightness and the other two colour.

What's New

List of Previous Editorials There is a pop-up list of previous editorials at the bottom of each editorial page, but here is a complete menu. New Search Facility WPDFD now has its own search facility and will quickly find all references to any word or phrase you enter. Web Page Design Survey It is interesting to find out what other web designers are using in terms of computers, monitors and browsers.

A few final notes

JPEGs compress smooth images better than images with sharp edges, so you could try smoothing the image slightly before compression (your web graphics application may have a slider to apply this without affecting the original image). This gives a good reduction in file size for little change in quality of the compressed image. JPEGs don't have to contain colour data. So if your image is made up of greys only, save it as a greyscale JPEG and save space by omitting the colour components you don't use.

When I looked at the first beta release of Macromedia Dreamweaver, it seemed very promising - a WYSIWYG editor that produced pretty clean code and didn't mess with it when modified. It also allowed linking into BBEdit or Allaire HomeSite to benefit from their more heavyweight text editing capabilities. I bought Dreamweaver 1.0 and very quickly became disenchanted. It was slow and buggy and I reverted back to my trusty old Claris HomePage.