Research Proposal Augmented Reality Visualization of Outdoor Environmental Corrosion
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Figure 2 ARVino viewport
Sensor VisualizationTaking the definition of visualization as the use of computer support, interactive, visual representation to increase understanding and cognition (Card et al., 1999), we define situated (in-situ) visualization as visual representations that are relevant to the context in which they are displayed, as a method to increase a user’s understanding of the environment (White et al., 2007). By using sensors to monitor the environment, the primary goal of sensor visualization is the conversion of collected data into visual representations to aid understanding (Yuxi et al., 2009). The SiteLens system (White and Feiner, 2009, White, 2009a, White, 2009b) is an example of in-situ visualization in AR, consisting of a handheld AR system used to visualize carbon dioxide (CO2) levels for on-site building inspectors. Carbon dioxide levels are represented as floating spheres/cylinders whose height/size are indicative of the carbon dioxide level recorded at that physical position (Figure 3). The ambiguity regarding when the data was collected led to confusion of users, unable to understand the temporal meaning of the data. The use of a handheld magic-lens approach allowed for a more natural method of interaction however, the system was limited to displaying only one type of sensor data, with no discussion relating to handling/viewing multiple dataset parameters and the possible relationships between them. An extension of this work also enabled object and shape recognition (Belhumeur et al., 2009), allowing the system to detect known objects when placed in the field of view. 
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