Geographic Label Data Sharing among Photographs

This paper proposes a new framework for sharing text labels among photographs. Digital photographs are usually organized by text labeling in order to search and browse a collection. But, labeling many photographs costs users much effort. On the other hand, many kinds of spatial sensors including GPS have become popular today. We assume there will be many photographs with spatial metadata such as geographic coordinates of camera’s positions and directions. We, therefore, suggest label sharing system for such photographs in this paper. The system (i) stores label data placed on photographs by a user, and (ii) computes geographic locations of objects in the real world pointed by stored labels. When a photograph requires label data, the system (iii) selects and shares all label data which are judged to be seen in the photograph by considering field of view (FOV) of the photograph. In this framework, label texts are placed on appropriate positions on photographs, and that makes photographs clickable when label data have URLs.