![]() The proposed method leverages the light sensors distributed at those points of interest (POI) to capture the structured light patterns projected by projector and converts them to the coordinates relative to the projector's image plane, and then calculates the homography matrix between the target projection surface plane and the projector image plane. In order to improve the efficiency and robustness of the geometric correction procedure, a new method based on structured light and homography is proposed. Vision based projector geometric correction involves complicated geometrical transforms and calibration procedures, and is susceptible to poor illumination and background or other external environmental factors. This review helps researchers to describe, analyze, and position relevant prior research and identify gaps in scientific knowledge. To contribute with a new theoretical perspective, we identify various roles of technology relevant for enhancement, representing three abstract categories: facilitating, inviting and encouraging. We contribute an in-depth study of 92 publications that present relevant solutions or prototypes, analyzing their focus areas, design objectives, and design and evaluation approaches. This literature review outlines the landscape of design explorations in this emergent research topic. However, there is little understanding of the optimal design solutions and roles of technology considering this goal. Various envisioned systems aim beyond simply enabling interaction, to actively enhance-i.e., improve the quality or extent of-social interaction between collocated people. An emergent research topic within this area relates to technological enhancement of social interaction. To the end, we discuss and unveil the potential future research opportunities of SAR design research for solving the accessibility issues.Ĭollocated interaction has received growing interest in both academic research and the design of information and communication technological applications. To unify these existing efforts and inform the future research paradigms, we paint the picture of methods and challenges of state-of-art SAR designs, with a particular focus on addressing accessibility issues of existing user interfaces. Over the past decade, an explosion of application oriented SAR research aims to address the accessibility issue of existing user interface without renovating the existing interfaces permanently, though are highly disconnected and fragmented. One solution to solve this is the Spatial Augmented Reality (SAR), a specific kind of Augmented Reality (AR) approach that synthesizes digital elements on top of physical environment by directly projecting computer generated graphics on the surfaces of physical object. Upgrading and redesigning existing interfaces would cause additional time, efforts and costs, leading to practical difficulties. With ubiq-uity, projector phone use may become problematic in public settings, motivating new rules of etiquette and per-haps laws, yet it may also engender new forms of creative expression.Īccessibility is about creating interfaces and products that can be used by everyone and in all contexts, which is a key methodology in human-centered design. Finally, we discuss the social implications of projector phone use for privacy and control, extrapolating from our observations to envision a future in which these devices are ubiquitous. ![]() Thus, even the ''basic'' projector phone platform affords novel interaction modalities. A key observation is that users can readily exploit the new facilities of these devices to author interesting effects by employing representational tech-niques such as superimposition, scaling, translation, and motion. In our analysis, we consider how context, such as group size, relationships, and locale, influences projector phone use. To begin to document how people use projector phones out-side the laboratory, we present the results of a 4-week exploratory field study of naturalistic use of commodity projector phones. Phones with integrated pico projectors are starting to be marketed as devices for business presenta-tions and media viewing, and researchers are beginning to design projection-specific applications and interaction techniques to explore a broader array of possible uses.
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