You might have noticed some of the images on the wiki that are portraits (taller than wide) are showing poor image quality right now. This is a bug in a recent update of Dokuwiki and has been corrected in the next release already so I expect to resolve this issue soon. Thanks for your patience and for bringing this to my attention. No action is required on your part, after I update the software again I'll clear the cache and the images should look crisp again.
Reference: fix image resizing with width only. fixes #3707 · splitbrain/dokuwiki@d967ecd
Reference: fix image resizing with width only. fixes #3707 · splitbrain/dokuwiki@d967ecd