A new class of software could solve some of the confidentiality concerns that ethnographers encounter when taking photos of participants -- an issue that I recently pondered.
I conducted a brief stint of fieldwork in Tokyo over the summer and wanted to take photos of my participants using their keitai (cell phones) and/or pasocon (personal computers). One of the issues I "faced," however, was maintaining their confidentiality while taking pictures that were also aesthetically pleasing. This meant that I gravitated towards taking pictures of them while wearing a mask (in a subtle nod to Mishima's Confessions of a Mask) instead of blurring their faces out.
However, there is an interesting and exciting piece of software that can swap out the faces that appear in photographs. The impetus behind the software is to protect the privacy of individuals that are captured in public photographs, such as those that appear on Google Street View.
Unfortunately, it doesn't exist commercially, yet, but it does present an interesting solution to a problem as such.
(Via Boing Boing.)