Most of my photographic images come from natural objects like palm fronds, leaves, sea shells, or pieces of tree bark. Sometimes I use a scanner to digitize these objects, and sometimes I use a digital camera. Other pictures begin with one of the photograms I made 30 or more years ago. Most of these photograms are shadow images of clear glass objects like drinking glasses, cake plates, or ashtrays.
Although I often use math to distort the shape of an image, all of the photographic images appearing here (so far!) have had only their colors changed by algorithm.
Even my photographic work always involves at least some mathematical treatment, but the images that are here called "Mathematical" were made by algorithm (numerical recipe) alone.
Some of the most treasured tools in my mathematical toolbox include:
Generalized Balanced Ternary, the Fibonacci Word, the Binary Reflected Gray Code, and Coxeter's Frieze Patterns of Integers.