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GLYPHS IN LAYERED 2D MEDICAL VISUALISATIONS Simon Walton

Post on 16-Jan-2017

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  • GLYPHS IN LAYERED 2D MEDICAL VISUALISATIONS

    Simon Walton

  • THEMES

    Glyphs in medical visualisation, generally

    Combining glyphs with other types of visual representations

  • GLYPHS IN MEDICAL VIS

    Glyphs in both research and clinical settings

    Clinicians still want numbers

    Perceptual bias is an issue

    Large variance in accuracy of perception

    Laying out glyphs can be an issue

  • POSITIONING GLYPHS

    Do we allow overlaps?

    What is the significance of each glyphs position?

    Strategies (Ward)

    Data-driven

    Structure-driven

  • POSITIONING GLYPHS

  • OTHER CONSIDERATIONS

    Do we want some glyphs to pop out?

    Can emphasise using visual perception theory

    What parameter mapping function is used?

    Continuous or discrete?

  • DIFFUSION TENSOR IMAGING

    Eigenvectors

    Ellipse

  • DIFFUSION TENSOR IMAGING

  • DIFFUSION TENSOR IMAGING

  • CMR VISUALISATION

  • CMR VISUALISATION

  • raw heatmap

    vector glyph

  • NEW DIFFICULTY

    =>LUT

  • CAN WE DO BETTER?Spatial

    frequencyDensity of coverage Transparency

    Colour important?

    Heart Low High No Yes

    Heatmap Low Low Variable No

    Vector High Low Variable No

    Glyphs High Low No Yes

  • CONCLUSION

    Layered visualisations largely an unsolved problem

    Do the benefits for the application outweigh the challenges?

    A layered visualisation can be `modulated to assist users visual decomposition of each layer

    How many visual channels can we use before the visualisation becomes useless?