  Photos can be treated as life logs of photo owners. Photos can be reliable
information to estimate patterns of actions and movements of the owners. Based
on this discussion, we are developing an interactive technique to explore the
recommended tourist spots based on their past personal travel photos. The
technique extracts a set of keywords from the photo set applying a generic
object recognition and constructs a tree structure to support the exploration
of the keywords. When a user selects a set of interesting keywords, the system
provides travel information related to the selected keywords. Our previous
paper already introduced the visualizations that demonstrate the
appropriateness of the structure of the keywords. This paper focuses on the
mechanism for interactive travel information retrieval of our system and user
evaluations with this system.
