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Comparative study of fixation density maps.

Ulrich Engelke1, Hantao Liu, Junle Wang

  • 1Philips Research Laboratories, Eindhoven 5656 AE, The Netherlands. ulrich.engelke@philips.com

IEEE Transactions on Image Processing : a Publication of the IEEE Signal Processing Society
|November 30, 2012
PubMed
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Fixation density maps (FDMs) from eye tracking are similar across labs, showing low impact on image processing applications. However, experimental conditions significantly influence inter-laboratory differences.

Area of Science:

  • Computer Vision
  • Human-Computer Interaction
  • Psychology

Background:

  • Fixation density maps (FDMs) from eye tracking are crucial for understanding human visual attention in image processing.
  • FDMs are often treated as ground truth, implying high similarity across independent studies.

Purpose of the Study:

  • To analyze the similarity of FDMs generated from independent eye tracking experiments.
  • To investigate the impact of presentation time and image content on FDM similarity.
  • To evaluate how FDM differences affect image processing applications like saliency modeling, quality assessment, and retargeting.

Main Methods:

  • Comparison of FDMs from three independent eye tracking experiments.
  • Analysis of fixation density map similarity under varying presentation times and image content.

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  • Evaluation of FDM differences' impact on visual saliency, image quality assessment, and image retargeting algorithms.

    • Main Results:

    • High overall similarity was observed between FDMs from different laboratories.
    • Differences in FDMs had a minimal impact on the performance of the evaluated image processing applications.
    • Individual experiment comparisons revealed significant differences, highlighting the influence of experimental conditions.

    Conclusions:

    • While FDMs are generally consistent, inter-laboratory variations are strongly dependent on specific experimental setups and conditions.
    • The findings provide valuable insights into the reliability and application of FDMs in image processing research.
    • Publicly available FDMs will facilitate further research and validation.