Guillermo Gonz�lez Camarena built his own monochromatic camera in 1934, and in 1940 he developed the first trichromatic system and obtained the first patent for color television in the world.
42.
Usually, three primary colors are combined to stimulate humans trichromatic color vision, sensed by the three types of cone cells in the eye, giving an apparently full range.
43.
While most humans are " trichromatic " ( having three types of color receptors ), many animals, known as " tetrachromats ", have four types.
44.
It is believed that middle and long wave sensitive pigments appeared after the final stages of short wavelength sensitive opsin pigments evolved, and that trichromatic vision was formed through interprotein epistasis.
45.
There is no need to dismiss the trichromatic theory of vision, but rather it can be enhanced with an understanding of how the visual system adapts to changes in the viewing environment.
46.
Under the conventional trichromatic theory, a'green'measurement is taken by placing a color filter in front of the light sensor that absorbs'red'and'blue '.
47.
In most Catarrhini ( Old World monkeys and apes primates closely related to humans ) there are three types of color receptors ( known as cone cells ), resulting in trichromatic color vision.
48.
While their Triassic ancestors were trichromatic, " Didelphis albiventris " is dichromatic, with only two classes of cone opsins having been found within the genus " Didelphis ".
49.
Primates have re-developed trichromatic color vision since that time, by the mechanism of gene duplication, being under unusually high evolutionary pressure to develop color vision better than the mammalian standard.
50.
Unlike trichromatic cameras, which divide light into three bands, hyperspectral systems can divide light into hundreds of narrow bands over a continuous range that covers a vast portion of the electromagnetic spectrum.
