On the weekend I created the following black and white barcode for Michael Kalus, which I call "shades of darkness":

shades of darkness

all of michael kalus's black and white photos >= 720 px high as of April 20, 2011 tagged "blackwhite" in ascending chronological order and then squished to 2px wide * 720 px high and then concatenated together. The image should be 990 pictures * 2 px wide = 1980 pixels wide but it is only 1974 pixels wide due to either a programming error or the photo missing from flickr (or my script couldn't download it from flickr)

partial colophon: