FIFTEEN YEARS AGO, two fraud cases sent shock waves through the world of photography, helping to trigger a revolution in photo conservation science. Long dismissed by the art establishment as a second-tier medium, “photography used to fight for space in galleries,” says James M. Reilly , director of the Image Permanence Institute in Rochester, N.Y. But by the 1990s the prestige—and price tags—o...

We have deployed a robot “photographer” at several events. The robot, Lewis, navigates through the space, opportunistically taking photographs of people. We summarize the different types of human-robot interactions we have observed at these events, and put forth some possible explanations for the different behaviors. We also discuss potential models for human-robot interactions in this constrai...