What would life have been like without colour
Wednesday, 4. February 2009, 16:28:22
We are in a world where colours dominate our lives, from reading signs on the road to seeing if fruit is ripe to eat. It affects our moods - blue is calming - red can make us tense.
Please click "read more..." to see all the photos!
Please click "read more..." to see all the photos!
Color or colour is the visual perceptual property corresponding in humans to the categories called red, yellow, blue and others. Color derives from the spectrum of light (distribution of light energy versus wavelength) interacting in the eye with the spectral sensitivities of the light receptors. Color categories and physical specifications of color are also associated with objects, materials, light sources, etc., based on their physical properties such as light absorption, reflection, or emission spectra.
Typically, only features of the composition of light that are detectable by humans (wavelength spectrum from 380 nm to 740 nm, roughly) are included, thereby objectively relating the psychological phenomenon of color to its physical specification. Because perception of color stems from the varying sensitivity of different types of cone cells in the retina to different parts of the spectrum, colors may be defined and quantified by the degree to which they stimulate these cells. These physical or physiological quantifications of color, however, do not fully explain the psychophysical perception of color appearance.
The science of color is sometimes called chromatics. It includes the perception of color by the human eye and brain, the origin of color in materials, color theory in art, and the physics of electromagnetic radiation in the visible range (that is, what we commonly refer to simply as light).
The color of an object depends on both the physics of the object in its environment and the characteristics of the perceiving eye and brain. Physically, objects can be said to have the color of the light leaving their surfaces, which normally depends on the spectrum of the incident illumination and the reflectance properties of the surface, as well as potentially on the angles of illumination and viewing. Some objects not only reflect light, but also transmit light or emit light themselves, which contribute to the color also. And a viewer's perception of the object's color depends not only on the spectrum of the light leaving its surface, but also on a host of contextual cues, so that the color tends to be perceived as relatively constant: that is, relatively independent of the lighting spectrum, viewing angle, etc. This effect is known as color constancy.
The red colour in the sky at sunset (and sunrise) is due to an effect called Rayleigh scattering. There is a similar form of scattering called Mie scattering which is responsible for the white colour of clouds.
Now read and think please:
Color blindness, a color vision deficiency, is the inability to perceive differences between some of the colors that others can distinguish. It is most often of genetic nature, but may also occur because of eye, nerve, or brain damage, or due to exposure to certain chemicals. The English chemist John Dalton published the first scientific paper on the subject in 1798, "Extraordinary facts relating to the vision of colours", after the realization of his own color blindness; because of Dalton's work, the condition is sometimes called Daltonism, although this term is now used for a type of color blindness called deuteranopia.
Color blindness is usually classed as disability; in certain situations, however, color blind people have an advantage over people with normal color vision. There are some studies which conclude that color blind individuals are better at penetrating certain camouflages.
Photos by zetorres José Torres - Words by Wikipedia
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MrLeffe # 4. February 2009, 16:45
Olgita # 4. February 2009, 17:19
saritina # 4. February 2009, 17:27
I have a friend who's daltonian, he can't see the difference between red, green, pink, orange.......many colours are grey for him !
PainterWoman # 4. February 2009, 17:33
I found part of his comments. After the equal (=) sign is what he sees:
Blue = silver
Orange, Red, Green = Brown
Shiney Brown = Green
Dull Brown = Brown
Yellow = Yellow (cadmium)
Red = Brite Brown
Orange = Dull Brown Or Sand
I don't see any pastels.
Pink, Violet, Lite Blue = Gray
Purple = Dark Gray
Juques # 4. February 2009, 18:04
ellinidata # 4. February 2009, 19:04
your care and amazing character brings color to our lives a great deal,
not to mention your amazing pictures!! thanks Pal!
thobi # 4. February 2009, 19:07
Shaunak # 4. February 2009, 19:12
Serves some food for thought.
cakkleberrylane # 4. February 2009, 19:16
SittingFox # 4. February 2009, 19:33
I've looked into this a little bit before because I'm curious as to what foxes see. They can see some colours, but not green. Also, the detail / sharpness they see is less, but they're better at detecting movement.
Stardancer # 4. February 2009, 19:48
Dacotah # 4. February 2009, 21:20
Flying Red Fox Blog # 5. February 2009, 07:19
Iam glad i dont have total colourblindness and its true we should all be thankfull that we can see colours. I think the best thing to have in life is good sight and a healthy body and friendship.
Flying Red Fox Blog # 5. February 2009, 07:24
http://www.photos.aero/photo.php?p=43895
Now there are 3 types of colour on the word TAP right? i maybe wrong but i thini the T is orangey/yellow, the A is green and the P red? Thats how i see it, dont worry about the merged bit thats almost impossible.
ricewood # 5. February 2009, 08:07
But don't you also sometimes prefer monochrome photography?
zetorres # 5. February 2009, 11:21
zetorres # 5. February 2009, 11:23
zetorres # 5. February 2009, 11:27
I have a friend who's daltonian, he can't see the difference between red, green, pink, orange.......many colours are grey for him !
Hi Sarah, it's sad they can't see like us...
Even I think B&W photography is amazing!
zetorres # 5. February 2009, 11:35
zetorres # 5. February 2009, 11:37
zetorres # 5. February 2009, 11:39
zetorres # 5. February 2009, 11:40
zetorres # 5. February 2009, 11:42
zetorres # 5. February 2009, 11:43
zetorres # 5. February 2009, 11:45
zetorres # 5. February 2009, 11:48
zetorres # 5. February 2009, 11:53
I hope this help a bit!
zetorres # 5. February 2009, 12:01
About TAP the "T" and "A" have a mix of two diferent greens, and yes "P" it is red!
Well done Mark!
zetorres # 5. February 2009, 12:11
Dacotah # 5. February 2009, 15:54
cakkleberrylane # 5. February 2009, 16:29
zetorres # 5. February 2009, 20:46
Thanks Lois! That's right!
Liu # 5. February 2009, 22:25
Dacotah # 5. February 2009, 22:53
ellinidata # 6. February 2009, 01:00
zetorres # 6. February 2009, 02:48
zetorres # 6. February 2009, 02:49
ellinidata # 6. February 2009, 03:01
yes I know why and I embrace it with love and friendship
zetorres # 6. February 2009, 03:20
Angel
greenwitch3 # 6. February 2009, 03:56
GREAT POST !!! Congratulations....and YEEES, I am a Coca Cola fan.
zetorres # 6. February 2009, 03:59
Pusilille # 6. February 2009, 04:07
And soon it will flurish with the most spectecular colours all over!
Have a fantastic day
zetorres # 6. February 2009, 04:11
Dacotah # 6. February 2009, 06:48
Angeliki, we have a favorite flower in common. I love to share.
Dacotah # 6. February 2009, 06:51
Liu # 6. February 2009, 08:00
zetorres # 6. February 2009, 10:07
zetorres # 6. February 2009, 10:10
ellinidata # 6. February 2009, 11:44
this is one picture I took in my garden in Greece:
http://i207.photobucket.com/albums/bb107/ellinidata/flowers/Dsc00142.jpg
zetorres # 6. February 2009, 12:03
From http://my.opera.com/365/albums/showpic.dml?album=185808&picture=3685544