The ability to direct a viewer's attention has important applications in computer graphics, data visualization, image analysis, and training. Existing computer-based gaze manipulation techniques, which direct a viewer's attention about a display, have been shown to be effective for spatial learning, search task completion, and medical training applications. In this work we extend the concept of gaze manipulation beyond digital imagery to include controlled, realworld environments. We address two main challenges in guiding attention to real-world objects: determining what object the viewer is currently paying attention to, and providing (projecting) a visual cue on a different part of the scene in order to draw the viewer's attention there. Our system consists of a pair of eye-tracking glasses to determine the viewer's gaze location, and a projector to create the visual cue in the physical environment. The results of a user study show that we can effectively direct the viewer's gaze in the real-world scene. Our technique has applicability in a wide range of instructional environments, including pilot training and driving simulators.
Figure 1: Fixation maps over an art work that contains separate panels, which, when viewed in the intended order, tell a coherent story. In this work a gaze direction technique is used to visually guide the viewer through the image. As can be seen above the distribution of fixations is very different for static viewing (A), and Gaze Directed viewing (B). The highlighted rectangular regions indicate story panels, and the numbered circles indicate viewing order. In the gaze directed case, both order viewing accuracy and fixations on relevant panels increased. AbstractNarrative art tells a story, either as a moment in an ongoing story or as a sequence of events unfolding over time. In many works of art separate panels within the same frame are used to depict the sequence of events. Often, there is no clear delineation between these panels, or any indication of the optimal viewing order. To improve visual literacy we propose using Subtle Gaze Direction (SGD) to direct the viewers gaze across an image in a manner which reveals the story. SGD uses small image space modulations in the luminance channel to guide a viewer's gaze about an image without disrupting their normal visual experience. Using a simple ordering task we compared performance using no modulation and using subtle modulation with the correct order of narrative episodes as intended by the artist. Results from experiments show improved performance when SGD is employed. This experiment establishes the potential of the method as an aid to visual navigation in images where the viewing order is unclear.
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