title: Differences of eye movement pattern in natural and man-made scenes and image categorization with the help of these patterns.
abstract: In this paper, we investigated the parameters related to eye movement patterns of individuals while viewing images that consist of natural and man-made scenes. These parameters are as follows: number of fixations and saccades, fixation duration, saccade amplitude and distribution of fixation locations. We explored the way in which individuals look at images of different semantic categories, and used this information for automatic image classification. We showed that the eye movements and the contents of eye fixation locations of observers differ for images of different semantic categories. These differences were used effectively in automatic image categorization. Another goal of this study was to find the answer of this question that "whether the image patches of fixation points have sufficient information for image categorization?" To achieve this goal, a number of patches with different sizes from two different image categories was extracted. These patches, which were selected at the location of eye fixation points, were used to form a feature vector based on K-means clustering algorithm. Then, different statistical classifiers were trained for categorization purpose. The results showed that it is possible to predict the image category by using the feature vectors derived from the image patches. We found significant differences in parameters of eye movement pattern between the two image categories (average across subjects). We could categorize images by using these parameters as features. The results also showed that it is possible to predict the image category by using image patches around the subjects' fixation points.
authors.affiliation: * Neuroscience and Neuroengineering Research Laboratory, Biomedical Engineering Department, Faculty of Electrical Engineering, Iran University of Science and Technology (IUST), Narmak, 16846-13114 Tehran, Iran.|† School of Cognitive Sciences (SCS), Institute for Research in Fundamental Sciences (IPM), Niavaran, P.O. Box 19395-5746, Tehran, Iran.
authors.forename: Hassan Zanganeh
authors.initials: HZ
authors.lastname: Momtaz
authors.affiliation: * Neuroscience and Neuroengineering Research Laboratory, Biomedical Engineering Department, Faculty of Electrical Engineering, Iran University of Science and Technology (IUST), Narmak, 16846-13114 Tehran, Iran.|† School of Cognitive Sciences (SCS), Institute for Research in Fundamental Sciences (IPM), Niavaran, P.O. Box 19395-5746, Tehran, Iran.
authors.forename: Mohammad Reza
authors.initials: MR
authors.lastname: Daliri
mesh_terms: D000328:Adult; D001288:Attention / Q000502:physiology; D003210:Concept Formation / Q000502:physiology*; D005133:Eye Movements / Q000502:physiology*; D005260:Female; D006801:Humans; D007092:Imagination / Q000502:physiology*; D008297:Male; D010775:Photic Stimulation; D012660:Semantics; D014796:Visual Perception / Q000502:physiology*; D055815:Young Adult
keywords: Eye movement pattern; automatic image classification; eye tracking; semantic categories