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Color sensitivity #17

Color sensitivity #17. Reporter Mikheil Tektumanidze Team “Georgians”. About Problem.

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Color sensitivity #17

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  1. Color sensitivity #17 Reporter MikheilTektumanidze Team “Georgians”

  2. About Problem • Some people (called color blind persons) have difficulties comparing the colors of two objects. But most people perceive the color difference at the first glimpse. How is it generally possible to quantitatively estimate the ability of a person to distinguish the color shades? Is a single numerical parameter sufficient, or a more complicated evaluation system is required?

  3. Presentation plan • Color definition • Color vision • Color blindness • Experiments • Conclusion

  4. Color definition Color is the visual perceptual property corresponding in human to the categories called red, blue, yellow, green and others.

  5. Color vision Vision is ability of nearly all organisms to transform light into irritation. Everything starts in the eye…

  6. Cones Cones are color-sensitive cells. They are 3 types red, blue and yellow. They have color-sensitive pigment. In front of this pigment there is liquid which filters colors. In human eye we have 3 kinds of filters (red, blue, yellow).

  7. Color-blindness Color-blindness is illness when humans have problems with color vision. It can be genetic or mechanic disease. There are different kinds of color-blindness. If color-blindness is genetic, it is on X Chromosome.

  8. Color-blindness dd D D Dd

  9. Experiments

  10. Experiments

  11. Experiments 1st 2nd 3rd R 1 R 0,22 R 1 B 0,42 B 0,16 B 1 Y 0,18 Y 0,18 Y 1 1st 2nd 3rd

  12. Conclusion • There are many kinds of color-blindness. • One number is not enough to show that kind of color-blind person someone is.

  13. Reference • Waldman, Gary (2002). Introduction to light : the physics of light, vision, and color (Dover ed. ed.). Mineola: Dover Publications. • Craig F. Bohren (2006). Fundamentals of Atmospheric Radiation: An Introduction with 400 Problems. Wiley-VCH. ISBN3-527-40503-8. • Berlin, B. and Kay, P., Basic Color Terms: Their Universality and Evolution, Berkeley: University of California Press, 1969. • Judd, Deane B.; Wyszecki, Günter (1975). Color in Business, Science and Industry. Wiley Series in Pure and Applied Optics (third ed.). New -York:Wiley-Interscience. p. 388. ISBN0-471-45212-2. • Hermann von Helmholtz, Physiological Optics – The Sensations of Vision, 1866, as translated in Sources of Color Science, David L. MacAdam, ed., Cambridge: MIT Press, 1970. • Palmer, S.E. (1999). Vision Science: Photons to Phenomenology, Cambridge, MA: MIT Press. ISBN 0-262-16183-4. • "Under well-lit viewing conditions (photopic vision), cones  ...are highly active and rods are inactive." Hirakawa, K.; Parks, T.W. (2005). "Chromatic Adaptation and White-Balance Problem". IEEE ICIP.doi:10.1109/ICIP.2005.1530559. • Color-blindness.com

  14. Thank you for your attention! Reporter MikheilTektumanidze. Color-blindness #17

  15. Animals • Bees can see in ultra-violet spectrum

  16. Color and brain

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