Interacting with augmented holograms

Verification of paper documents is an important part of checking a person's identity, authorization for access or simply establishing a trusted currency. Many documents such as passports or paper bills include holograms or other view-dependent elements that are difficult to forge and therefore are used to verify the genuineness of that document. View-dependent elements change their appearance based both on viewing direction and dominant light sources, thus it requires special knowledge and training to accurately distinguish original elements from forgeries. We present an interactive application for mobile devices that integrates the recognition of the documents with the interactive verification of view-dependent elements. The system recognizes and tracks the paper document, provides user guidance for view alignment and presents a stored image of the element's appearance depending on the current view of the document also recording user decisions. We describe how to model and capture the underlying spatially varying BRDF representation of view-dependent elements. Furthermore, we evaluate this approach within a user study and demonstrate that such a setup captures images that are recognizable and that can be correctly verified.

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“…By extending a partial hologram reconstruction with additional content, a dynamic high-quality display can be realized [3].…”

Section: Related Workmentioning

confidence: 99%

Mobile interactive hologram verification

Härtl

Grubert

Schmalstieg

et al. 2013

2013 IEEE International Symposium on Mixed and Augmented Reality (ISMAR)

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“…Today, motion sensors and touch capabilities have made interaction with such images possible. Holographic objects augmented with interaction modalities (as we know from interactive computer graphics) can thus become part of smart environments, not really different from tangible objects (Bimber et al, 2005). Realtime altering of images is possible, and, clearly, holographic images can take the form of virtual humans with which we can interact.…”

Section: Future Trendsmentioning

confidence: 99%