What colors distinguish the human eye


human eye contains two types of receptors tsvetovospriimchivyh: the first are responsible for night vision (help a person to distinguish colors at dusk), the second - for the color.The retina of the human eye contains three types of cones, which allow to distinguish colors and shades.With high sensitivity, they are responsible for what color a person sees.The maximum sensitivity of the accounts for the blue, green and red portions of the spectrum.That is why people recognize these colors best.It should be noted that the range of spectral sensitivity of the three cones intersect, so the impact is very strong light, the human eye perceives this as a dazzling white color.Due to the light-sensitive receptors and the cones, man is able to
distinguish not only the seven colors of the rainbow, and the much larger number of colors and shades.


How many colors the human eye recognizes


Since ancient times, scientists have determined the number of recognizable human colors and shades in different ways.Now they agree that there are about 150,000 color tones and shades.Thus the human eye normally can differentiate about 100 shades of a color background.The ability to recognize more colors can be trained.Painters, decorators, designers and people of similar professions can distinguish about 150 colors for color tones, saturation of the order of 25 and 64 in terms of light.


These figures may vary depending on the degree of natrenirovannosti man, his physiological condition and the lighting conditions.For example, under certain circumstances a person may distinguish the order of 500 shades of gray.


And if you compare with the camera


In the era of digital cameras would be an interesting comparison of the light-sensitive receptors of the retina of the human eye with megapixel cameras.Translating tsvetovospriimchivost human eye into the language of digital cameras, it can be said that in each eye is approximately 120-140 megapixels.Modern cameras average the number of pixels is much less, and therefore the density of pixels per millimeter is lower.It is therefore the angular resolution of the eye have to be several times higher than that of the camera lens focal length of 23 mm (which has such a focal length of the lens).