Effects of Video Placement and Spatial Context Presentation on Path Reconstruction Tasks with Contextualized Videos

Abstract

Many interesting and promising prototypes for visualizing video data have been proposed, including those that combine videos with their spatial context (contextualized videos). However, relatively little work has investigated the fundamental design factors behind these prototypes in order to provide general design guidance. Focusing on real-time video data visualization, we evaluated two important design factors--video placement method and spatial context presentation method--through a user study. In addition, we evaluated the effect of spatial knowledge of the environment. Participants' performance was measured through path reconstruction tasks, where the participants followed a target through simulated surveillance videos and marked the target paths on the environment model. We found that embedding videos inside the model enabled realtime strategies and led to faster performance. With the help of contextualized videos, participants not familiar with the real environment achieved similar task performance to participants that worked in that environment. We discuss design implications and provide general design recommendations for traffic and security surveillance system interfaces.

Towards the design of an intuitive multi-view video navigation interface based on spatial information

“…Wang et al introduce the topic of "contextualized videos" in [16] and were the first to expand upon the topic of the design space available for the interface with MVV systems. Their work investigated, similar to our approach, how and to what extent the presentation of multiple videos can offload the difficulty of spatial…”

“…The studies involving surveillance scenarios [5] [16] generally require users to follow an object in the videos using the designed interface. For the evaluation of the perceived quality of various methods for generating UGC mashups, Shrestha et al [14] set up a within-subject test using the content and the generating method as variables.…”

Evaluating video visualizations of human behavior

“…They conclude with an informal user study based on tasks and usage patterns. In a follow-up, Wang et al present a rigorous user study comparing performance through path reconstruction tasks [22]. They compare two contextualized video design factors and two levels of knowledge in participants.…”

Treatment effects of stimulant medication in young boys with fragile X syndrome

“…The underlying mechanisms associated with ADHD in FXS are unknown; however, FMRP reduction has been associated with decreased attention in children with FXS (Loesch et al 2004) and increased physiological arousal (Miller et al 1999), suggesting that FMRP may be a molecular marker of the underlying pathophysiology of attention deficits in FXS. Lower FMRP levels are associated with neuroanatomical changes including enhanced dendritic branching and immature spines (Comery et al 1997; Weiler and Greenough 1999), as well as altered dopamine and norepinephrine pathways (Hagerman et al 2002; Weiler and Greenough 1999; Wang et al 2008, 2010). Enhanced dendridic connections and potential dopamine deficits have been proposed as possible mechanisms through which stimulant medications reduce electrodermal responsiveness in individuals with FXS (Hagerman et al 2002).…”