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Icbv lecture-notes-12-sensing-2-the-human-eye-1 spp
Icbv lecture-notes-12-sensing-2-the-human-eye-1 spp
Icbv lecture-notes-12-sensing-2-the-human-eye-1 spp
Icbv lecture-notes-12-sensing-2-the-human-eye-1 spp
Icbv lecture-notes-12-sensing-2-the-human-eye-1 spp
Icbv lecture-notes-12-sensing-2-the-human-eye-1 spp
Icbv lecture-notes-12-sensing-2-the-human-eye-1 spp
Icbv lecture-notes-12-sensing-2-the-human-eye-1 spp
Icbv lecture-notes-12-sensing-2-the-human-eye-1 spp
Icbv lecture-notes-12-sensing-2-the-human-eye-1 spp
Icbv lecture-notes-12-sensing-2-the-human-eye-1 spp
Icbv lecture-notes-12-sensing-2-the-human-eye-1 spp
Icbv lecture-notes-12-sensing-2-the-human-eye-1 spp
Icbv lecture-notes-12-sensing-2-the-human-eye-1 spp
Icbv lecture-notes-12-sensing-2-the-human-eye-1 spp
Icbv lecture-notes-12-sensing-2-the-human-eye-1 spp
Icbv lecture-notes-12-sensing-2-the-human-eye-1 spp
Icbv lecture-notes-12-sensing-2-the-human-eye-1 spp
Icbv lecture-notes-12-sensing-2-the-human-eye-1 spp
Icbv lecture-notes-12-sensing-2-the-human-eye-1 spp
Icbv lecture-notes-12-sensing-2-the-human-eye-1 spp
Icbv lecture-notes-12-sensing-2-the-human-eye-1 spp
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Icbv lecture-notes-12-sensing-2-the-human-eye-1 spp

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presentation on human eye

presentation on human eye

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  • 1. Sensing and the Imaging Process (II) Introduction to Computational and Biological Vision CS 202-1-5261 Computer Science Department, BGU Ohad Ben-Shahar
  • 2. The human eye
  • 3. The human eye
  • 4. The human eyePinhole camera model
  • 5. The human eye Pinhole camera model: Basic geometry Optical axisImageplane Virtual Image Pinhole plane (center of projection)
  • 6. The human eye Pinhole camera model: Perspective projection P = ( x, y , z ) Pi = ( xi , yi , f ) fPi = (− xi ,− yi ,− f ) O  x xi yi f  xi = f ⋅ z OPi = λ ⋅ OP ⇒ λ= = = ⇒  x y z y  yi = f ⋅  z
  • 7. The human eye Pinhole camera model: Perspective projectionDurer (c. 1500)
  • 8. The human eyePinhole camera model: Basic geometry Recovery of structure is ill defined
  • 9. The human eye The retina:The biological image plane
  • 10. The human eye Aside – Neural signaling and communication Cerebellar CerebellarRetinal bipolar cell Purkinje cell pyramidal cell
  • 11. The human eyeAside – Neural signaling and communication
  • 12. The human eyeAside – Neural signaling and communication
  • 13. The human eye The retinaVariety of cells: Photoreceptors: ~100 million (95% rods,5% cones) Bipolar cells Ganglion cells Amacrine cells Horizontal cellsOptic nerve: Made of axons of secondary (ganglion) neurons ~1 million axons
  • 14. The human eyeA defective design? Light
  • 15. The human eyeThe optic disk and the blind spot
  • 16. The human eyeThe optic disk and the blind spot
  • 17. The human eye Rods and cones Rods: •Extremely sensitivity to light •Single photon response •Low spatial resolution •Single response profile •B&W night vision (scotopic) Cones: •Relatively insensitive to light •100 photos for response comparable with rods •High spatial resolution •Different (3 types of) response profiles •Color daylight vision (photopic)
  • 18. The human eye Rods and cones
  • 19. The human eye Rods and cones ) t (S M) m( or LongSh d iu Me L) (
  • 20. The human eyeRods and cones: distribution across the retina
  • 21. The human eye The fovea (“pit”) •Extremely high density of cone receptors •Few rods. None in the foveola. •Displaced neural layers •No blood vessels •1-1 relationship with bipolar and ganglion cells1.2 mm
  • 22. The human eyeThe fovea: distribution of optic fibers

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