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  2. Impossible color - Wikipedia

    en.wikipedia.org/wiki/Impossible_color

    Opponent process color theories, which treat intensity and chroma as separate visual signals, provide a biophysical explanation of these chimerical colors. [7] For example, staring at a saturated primary-color field and then looking at a white object results in an opposing shift in hue, causing an afterimage of the complementary color ...

  3. Opponent process - Wikipedia

    en.wikipedia.org/wiki/Opponent_process

    The opponent-process theory suggests that there are three opponent channels, each comprising an opposing color pair: red versus green, blue versus yellow, and black versus white . [1] The theory was first proposed in 1892 by the German physiologist Ewald Hering.

  4. Opponent-process theory - Wikipedia

    en.wikipedia.org/wiki/Opponent-process_theory

    Opponent-process theory is a psychological and neurological model that accounts for a wide range of behaviors, including color vision. This model was first proposed in 1878 by Ewald Hering , a German physiologist, and later expanded by Richard Solomon , a 20th-century psychologist.

  5. Unique hues - Wikipedia

    en.wikipedia.org/wiki/Unique_hues

    Unique hue is a term used in perceptual psychology of color vision and generally applied to the purest hues of blue, green, yellow and red. The proponents of the opponent process theory believe that these hues cannot be described as a mixture of other hues, and are therefore pure, whereas all other hues are composite. [1]

  6. Color vision - Wikipedia

    en.wikipedia.org/wiki/Color_vision

    Color vision, a feature of visual perception, ... that the reddish-green color proposed to be impossible by opponent process theory is, in fact, the color yellow ...

  7. 'Night-Grazing' Is the Persian Tradition That Keeps Food ...

    www.aol.com/night-grazing-persian-tradition...

    Yalda Night, or Shab-e Yalda (also spelled Shabe Yalda), marks the longest night of the year in Iran and in many other Central Asian and Middle Eastern countries. On the winter solstice, in a ...

  8. Lilac chaser - Wikipedia

    en.wikipedia.org/wiki/Lilac_chaser

    According to opponent process theory, the human visual system interprets color information by processing signals from the retinal ganglion cells in three opponent channels: red versus green, blue versus yellow, and black versus white. Responses to one color of an opponent channel are antagonistic to those of the other color.

  9. These Vintage Apple Products Are Worth Way More Than You ...

    www.aol.com/vintage-apple-products-worth-way...

    The introduction of the Apple II was a major leap in development for Apple, as the product included a built-in keyboard (a first!), multi-color on-screen graphics, and more.