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Guidance of eye movements on a gaze-contingent display
| Content Provider | Semantic Scholar |
|---|---|
| Author | Dorr, Michael Martinetz, Thomas Gegenfurtner, Karl R. Barth, Erhardt |
| Copyright Year | 2004 |
| Abstract | We present a system that allows to display and manipulate high resolution image sequences as a function of gaze in real time. An eye tracker was connected to a video workstation and software was developed with an emphasis on low latency, so that the whole system is capable of reacting to an eye movement within less than 30 ms. In first experiments with this system, we measured the effect of presenting peripheral visual patterns on the subjects' scan paths when viewing 20 s long video clips of natural outdoor environments. Small red squares or looming patterns were overlaid on the video for 120 ms at locations about 12o away from the position of gaze. The actual location was chosen randomly from candidate locations that had some minimal amount of saliency (spatio-temporal curvature). Results show that for some subjects, about 70% of the peripheral stimuli triggered a saccade to the desired location, while in the worst case this rate was about 20%. Our research aims at creating new forms of visual communication and vision-based interaction [1]. Introduction We perceive our visual world as colourful and rich in detail across the whole visual field. The fact that we actually perceive only very little detail at a time remains mainly unconscious because we constantly scan the visual world by moving our eyes. These eye movements are not only a necessary prerequisite for successful visual perception, but their exact order does also determine to a large extent how we perceive the visual world. For specific tasks, the human visual system deploys specific patterns of eye movements, or scan paths. This also means that a given scan path can be unsuitable for unexpected situations or tasks, for example change detection [2, 3]. We therefore believe that the scan path should become part of visual communication systems as are the classical image attributes, luminance and colour. Thus, the scan path needs to be recorded, processed, and “displayed”. We plan to display a desired scan path by guiding the gaze of the observer. We will present here a prototype system that can affect the eye movements subjects make while looking at video clips of natural dynamic scenes. To this end, these video clips are manipulated dependent on the current fixation point and the spatio-temporal curvature of the image sequence to create stimuli that are designed to attract the observers' gaze. 2 M Dorr, T Martinetz, K Gegenfurtner, and E Barth These experiments will allow us to continue towards systems that are able to guide the scan path of an observer. Such a recommended scan path could improve humanmachine communication, maximize information content of a display, or could function as an aid to disabled people. Theory With an image sequence defined by its image-intensity function ) , , ( t y x f and partial derivatives denoted t y x f f f , , , the structure tensor is |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://www.inb.uni-luebeck.de/publications/pdfs/DoMaGeBa04a.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
