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Basics Vision+

Basics Vision+. Scalar Field 1D 2D 3D Vector Field 1D 2D 3D Time Varying All of the above. Discrete 1D K-dimensional Nominal Overlapping sets of data with multiple nominal attributes Graph G = {V,E} Tree Directed acyclic Entities and Relationships Hyper graph. Data Classes.

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Basics Vision+

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  1. Basics Vision+ Ware:Vislab:CCOM

  2. Scalar Field 1D 2D 3D Vector Field 1D 2D 3D Time Varying All of the above Discrete 1D K-dimensional Nominal Overlapping sets of data with multiple nominal attributes Graph G = {V,E} Tree Directed acyclic Entities and Relationships Hyper graph Data Classes What is a map? Ware:Vislab:CCOM

  3. Human Visual Field

  4. Visual Angle

  5. 1 diopter: a lens that focuses at 1 meter. d = 1/f 45d Cornea ~15d Lens

  6. Acuities Vernier super acuity (10 sec) Grating acuity Two Point acuity (0.5 min) What is the ideal resolution

  7. CAVE iPhone • Resolution problems • Light scattering problems 1136x640 8 cm 1280x1024

  8. CAVE iPhone • Resolution problems • Light scattering problems 140 pixels/degree 1280x1280 14 pixels/deg 20,000 pixels/ deg2 196 pixels/ deg2

  9. Immersion VR • HMD + head tracking • Data glove

  10. Human Spatial Acuity

  11. Cutoff at 50 cycles/deg. • Receptors: 20 sec of arc • Pooled over larger and larger areas • 100 million receptors • 1 million fibers to brain • A desktop screen may have 30 pixels/cm – need about 4 times as much. • I phones better. • VR displays have 5 pixels/cm

  12. Aliasing and Anti aliasing

  13. Temporal Aliasing • Human Flicker fusion 50 Hz • Temporal aliasing occurs with moving targets • Must compute motion blur to fix the problem

  14. Acuity Distribution

  15. Brain Pixels

  16. Ware:Vislab:CCOM

  17. Ware:Vislab:CCOM

  18. Visual search

  19. The Process of Visual Thinking Ware:Vislab:CCOM

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