Multiple view geometry in computer vision
Multiple view geometry in computer vision
Photo tourism: exploring photo collections in 3D
ACM SIGGRAPH 2006 Papers
Computer
Designing Virtual Worlds
Accurate Camera Calibration from Multi-View Stereo and Bundle Adjustment
International Journal of Computer Vision
Reconstructing the world in 3D: bringing games with a purpose outdoors
Proceedings of the ACM SIGKDD Workshop on Human Computation
PhotoCity: training experts at large-scale image acquisition through a competitive game
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
Performance and perceptions of human computation games for image tagging
Proceedings of the 2011 ACM Symposium on Applied Computing
Who, what, why: examining annotations in mobile content sharing games
ICADL'11 Proceedings of the 13th international conference on Asia-pacific digital libraries: for cultural heritage, knowledge dissemination, and future creation
Proceedings of the 12th Brazilian Symposium on Human Factors in Computing Systems
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We are interested in reconstructing real world locations as detailed 3D models, but to achieve this goal, we require a large quantity of photographic data. We designed a game to employ the efforts and digital cameras of everyday people to not only collect this data, but to do so in a fun and effective way. The result is PhotoCity, a game played outdoors with a camera, in which players take photos to capture flags and take over virtual models of real buildings. The game falls into the genres of both games with a purpose (GWAPs) and alternate reality games (ARGs). Each type of game comes with its own inherent challenges, but as a hybrid of both, PhotoCity presented us with a unique combination of obstacles. This paper describes the design decisions made to address these obstacles, and seeks to answer the question: Can games be used to achieve massive data-acquisition tasks when played in the real world, away from standard game consoles? We conclude with a report on player experiences and showcase some 3D reconstructions built by players during gameplay.