Space-variant spatio-temporal filtering of video for gaze visualization and perceptual learning

We introduce an algorithm for space-variant filtering of video based on a spatio-temporal Laplacian pyramid and use this algorithm to render videos in order to visualize prerecorded eye movements. Spatio-temporal contrast and colour saturation are reduced as a function of distance to the nearest gaze point of regard, i.e. nonfixated, distracting regions are filtered out, whereas fixated image regions remain unchanged. Results of an experiment in which the eye movements of an expert on instructional videos are visualized with this algorithm, so that the gaze of novices is guided to relevant image locations, show that this visualization technique facilitates the novices’ perceptual learning. CR Categories: I.4.9 [Image Processing and Computer Vision]: Applications; I.4.3 [Image Processing and Computer Vision]: Enhancement—Filtering; I.4.10 [Image Processing and Computer Vision]: Image Representation—Multidimensional; K.3.1 [Computers and Education]: Computer Uses in Education�...

• Type: Conference
• Year: 2010
• Where: ETRA
• Authors: Michael Dorr, Halszka Jarodzka, Erhardt Barth
• Keywords: Computer Vision, ETRA 2010, Eye Movements, Eye Tracking Research, Image Processing