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Issue No.11 - November (2011 vol.33)
pp: 2131-2146
Alexander Toet , TNO Human Factors, Soesterberg
The predictions of 13 computational bottom-up saliency models and a newly introduced Multiscale Contrast Conspicuity (MCC) metric are compared with human visual conspicuity measurements. The agreement between human visual conspicuity estimates and model saliency predictions is quantified through their rank order correlation. The maximum of the computational saliency value over the target support area correlates most strongly with visual conspicuity for 12 of the 13 models. A simple multiscale contrast model and the MCC metric both yield the largest correlation with human visual target conspicuity ({>}0.84). Local image saliency largely determines human visual inspection and interpretation of static and dynamic scenes. Computational saliency models therefore have a wide range of important applications, like adaptive content delivery, region-of-interest-based image compression, video summarization, progressive image transmission, image segmentation, image quality assessment, object recognition, and content-aware image scaling. However, current bottom-up saliency models do not incorporate important visual effects like crowding and lateral interaction. Additional knowledge about the exact nature of the interactions between the mechanisms mediating human visual saliency is required to develop these models further. The MCC metric and its associated psychophysical saliency measurement procedure are useful tools to systematically investigate the relative contribution of different feature dimensions to overall visual target saliency.
Saliency, image analysis, visual search.
Alexander Toet, "Computational versus Psychophysical Bottom-Up Image Saliency: A Comparative Evaluation Study", IEEE Transactions on Pattern Analysis & Machine Intelligence, vol.33, no. 11, pp. 2131-2146, November 2011, doi:10.1109/TPAMI.2011.53
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