All problems from 1-8, 2.1 differences between people

PROBLEM 3/4




15/01/21

, |
Basic of color
principes perception
mot of the
tight we see is retteckd
light typical light sources
,
include
the Sun CR
light bulbs
↳
these sources en it wave
length that are absorbed
by the surfaces
they
hit
the is absorbed , the darker the surface Will appeler
* more
tight
retteckd Cif not absorbed) and this tight
*
other wave
length are

Peaches the
eye

The color the surface dépends the mix of Wave
* of on
length that
Reach the from the surface
eye

3 Steps to color perception
Detection wave
length must be détected
=




Discrimination =
we must be cible to HII the différence between one wavelength

CR ( mixture et wave
length) and an other

Appearance =
we went to
assign perceived Colors to
lights d surfaces
in the world



Step one : COUR delection


*
Have three type of Cone receptor ,
these cornes differ in the photo pigment
they Carry →
they diff in their sens
itivity to light of different wave length


v
- v v

(5) hart canes (Medium cornes barge canes
= = =




peak at 420 nm
peak at 535
peak at 565
" " " "
blue Cone " "

Green Cone Red one