Kaufmann, BonifazHitz, MartinReiterer, HaraldDeussen, Oliver2017-11-222017-11-222012978-3-486-71990-1https://dl.gi.de/handle/20.500.12116/7762Peephole interaction is a promising interaction technique for mobile projector phones. It allows the creation of extra-large virtual workspaces which contain more information than can be appropriately displayed on a small smartphone screen. In this paper we describe a projector phone prototype that implements peephole interaction without instrumenting the environment or using any additional hardware besides a smartphone and a handheld projector. This device allows for the first time to perform peephole interaction in the wild. Moreover, we demonstrate some applications we have built to exploit and investigate the full potential of peephole interaction with projector phones.enHandheld projectorprojector phonepeephole pointingpeephole interactionText/Workshop Paper