The browser view and exported HTML documents will inline links to images. For example:
http://www.eclipse.org/images/EclipseBannerPic.jpg
will embed the image in place in the document.
If you would like a set of local images made available to your documents then the you can use the Eclipse: protocol to link to them and they will be inlined. But you may find it useful to create an entry in your Wikispace to the image location:
Images=Eclipse:/MyProject/MyDocs/images/
You can now link to images with: Images:myImage.jpg