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Feed and fly control of visual scanpaths for foveation image processing

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Abstract

Foveation-based processing and communication systems can exploit a more efficient representation of images and videos by removing or reducing visual information redundancy, provided that the sequence of foveation points, the visual scanpath, can be determined. However, one point that is neglected by the great majority of foveation models is the “noisy” variation of the random visual exploration exhibited by different observers when viewing the same scene, or even by the same subject along different trials. Here, a model for the generation and control of scanpaths that accounts for such issue is presented. In the model, the sequence of fixations and gaze shifts is controlled by a saliency-based, information foraging mechanism implemented through a dynamical system switching between two states, “feed” and “fly.” Results of the simulations are compared with experimental data derived from publicly available datasets.

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Correspondence to Giuseppe Boccignone.

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Boccignone, G., Ferraro, M. Feed and fly control of visual scanpaths for foveation image processing. Ann. Telecommun. 68, 201–217 (2013). https://doi.org/10.1007/s12243-012-0316-9

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Keywords

  • Eye movements
  • Random walk
  • Visual attention
  • Image encoding