Like traditional photography, Giraurd’s process works by using a light-sensitive material to capture the image upon exposure to it but, rather than photographic film, he uses a petri dish coated in micro-organism that react to the light by growing in different densities.
Instead of needing time to develop, like a photograph, an “algae-graph” needs time to grow, sometimes for up to 4 days. It makes me wonder if there might be a cave out there somewhere with a perfect image from a natural camera obscura growing in it!
[vimeo 40735131 w=640 h=360]
[via Geyser of Awesome]