Combining multitouch gestures and sketches to explore photo collections

In this paper we present an approach for interactive exploration of photo collections, which combines seamlessly multitouch gestures and sketches. Multitouch gestures are used to navigate through the photo collection, while sketches are used to filter the images presented to the user, according to their properties and metadata. The different gestures provided for interaction, their correspondent actions and how they are invoked are described in the remainder of this paper.