The Human Eye Specifications - 576MP!

Started Apr 23, 2010 | Discussions thread
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chillgreg
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The Human Eye Specifications - 576MP!
Apr 23, 2010

I was interested in how the human eye compares to digital imaging and so far have found and compiled this table from the sources listed at bottom:

Human Eye Specifications (typical):

  • Sensor (Retina) : 22mm diameter x 0.5mm thick (section); 10 layers

  • Resolution : 576MP equiv.

  • Visual Acuity : ~ 74 MP (Megapixels) (printed) to show detail at the limits of human visual acuity

  • ISO : 1 - 800 equivalent

  • Data Rate : 500,000 bits per second without colour or around 600,000 bits per second including colour.

  • Lens : 2 lenses - 16mm & 24mm diameter

  • Dynamic Range - Static : contrast ratio of around 100:1 (about 6 1/2 f-stops) (4 seconds)

  • Dynamic Range - Dynamic : contrast ratio of about 1,000,000:1 (about 20 f-stops) (30 minutes)

  • Focal Length : ~ 3.2mm - (~ 22mm 35mm equiv)

  • Aperture : f2.1 - f8.3 (f3.5 dark-adapted is claimed by the astronomical community)

  • FOV Field of View : 95° Out, 75° Down, 60° In, 60° Up

  • Color Space - 3D (non-linear) RGB

  • Color Sensitivity : 10,000,000 (ten million)

  • Color Range : 380 to 740 nm

  • White Balance : Automatic (constant perceived color under different lighting)

  • Refresh Rate : foveal vision (high-quality telescopic) - 3-4fps; peripheral vision (very inaccurate) - up to 90fps

Obviously compiling this creates some very big assumptions - many of these are interrelated to the brain's processing of the eye's signals. I am sure that while the above statistics are factual, presenting them as a direct apples-for-apples correlation to common camera specifications is probably fraught with inconsistencies. So bear in mind that I did this just for fun!

Enjoy
Greg

Sources:
http://en.wikipedia.org/wiki/Human_eye
http://en.wikipedia.org/wiki/Color_vision#Theories_of_color_vision
http://en.wikipedia.org/wiki/Visual_perception
http://en.wikipedia.org/wiki/Retina
http://photo.net/photo/edscott/vis00010.htm
http://photo.net/photo/edscott/vis00020.htm
http://www.siliconimaging.com/ARTICLES/CMOS%20PRIMER.htm
http://www.clarkvision.com/imagedetail/eye-resolution.html

1. posterior chamber 2. ora serrata 3. ciliary muscle 4. ciliary zonules 5. canal of Schlemm 6. pupil 7. anterior chamber 8. cornea 9. iris 10. lens cortex 11. lens nucleus 12. ciliary process 13. conjunctiva 14. inferior oblique muscle 15. inferior rectus muscle 16. medial rectus muscle 17. retinal arteries and veins 18. optic disc 19. dura mater 20. central retinal artery 21. central retinal vein 22. optic nerve 23. vorticose vein 24. bulbar sheath 25. macula 26. fovea 27. sclera 28. choroid 29. superior rectus muscle 30. retina

NB. Images are Public Domain

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