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Digital public displays are a popular means of communication nowadays. They are commonly used as information outlets at traffic hubs, shopping malls, or public places in general. They feature some key advantages in comparison to other media types. For example, they are more flexible and more up-to-date than static paper-based approaches. Since they are always situated in a certain context, they can disseminate information tailored to a specific location. Compared to personal devices, that usually also have significantly smaller screens, digital public displays allow to distribute information within a spatial frame of reference. Moreover, they are visually prominent and provide broad accessibility.

Clearly, showing users content that is relevant to them is an important issue. For example, due to a lack of relevant content, many people have developed a blindness towards public displays. Personal content is often regarded as relevant, but that calls for certain means of privacy in turn. Multipleye is an approach to preserve the user’s privacy. The approach is based on two components: A web app, used to generate visually multiplexed images (, and this mobile application used to demultiplexed these images. Multipleye supports four methods: Frequency-Division Multiplexing, Code-Division Multiplexing, Time-Division Multiplexing, and Augmented Reality.

The web app is available at This app is part of Morin Ostkamp's dissertation. You may find further information about the dissertation at

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Support for iOS 10.

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