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Markov models for ocular fixation locations in the presence and absence of colour

Published version
Peer-reviewed

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Authors

Kashlak, AB 
Devane, E 
Dietert, H 
Jackson, H 

Abstract

In response to the 2015 Royal Statistical Society's statistical analytics challenge, we propose to model the fixation locations of the human eye when observing a still image by a Markov point process in R2. Our approach is data driven using k-means clustering of the fixation locations to identify distinct salient regions of the image, which in turn correspond to the states of our Markov chain. Bayes factors are computed as the model selection criterion to determine the number of clusters. Furthermore, we demonstrate that the behaviour of the human eye differs from this model when colour information is removed from the given image.

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Keywords

Bayesian model selection, cluster analysis, finite mixture model, image saliency, Markov point process, ocular fixation

Journal Title

Journal of the Royal Statistical Society. Series C: Applied Statistics

Conference Name

Journal ISSN

0035-9254
1467-9876

Volume Title

Publisher

Wiley
Sponsorship
Engineering and Physical Sciences Research Council (EP/H023348/1)
This work was supported by UK Engineering and Physical Sciences Research Council grant EP/H023348/1 for the University of Cambridge Centre for Doctoral Training, Cambridge Centre for Analysis.