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  2. iPhone 13 - Wikipedia

    en.wikipedia.org/wiki/IPhone_13

    The iPhone 13 features a 6.1-inch (155 mm) display with Super Retina XDR OLED technology at a resolution of 2532×1170 pixels and a pixel density of about 460 PPI with a refresh rate of 60 Hz. The iPhone 13 Mini features a 5.4-inch (137 mm) display with the same technology at a resolution of 2340×1080 pixels and a pixel density of about 476 PPI.

  3. Retina display - Wikipedia

    en.wikipedia.org/wiki/Retina_display

    The pixels are visible at normal viewing distance. Retina display is a branded series of LCDs and OLED displays by Apple Inc. that have a higher pixel density than traditional displays. [1] Apple has registered the term "Retina" as a trademark with regard to computers and mobile devices with the United States Patent and Trademark Office and ...

  4. Color vision - Wikipedia

    en.wikipedia.org/wiki/Color_vision

    Color vision. Color vision, a feature of visual perception, is an ability to perceive differences between light composed of different frequencies independently of light intensity. Color perception is a part of the larger visual system and is mediated by a complex process between neurons that begins with differential stimulation of different ...

  5. iPhone 13 Pro - Wikipedia

    en.wikipedia.org/wiki/IPhone_13_Pro

    The iPhone 13 Pro has a 6.06 inch (154 mm) (marketed as 6.1-inch (15 cm)) OLED display with a resolution of 2532 × 1170 pixels (2.9 megapixels) at 460 PPI, while the iPhone 13 Pro Max has a 6.68 inch (170 mm) (marketed as 6.7-inch (17 cm)) OLED display with a resolution of 2778 × 1284 pixels (3.5 megapixels) at 458 PPI. Both models have the ...

  6. Tetrachromacy - Wikipedia

    en.wikipedia.org/wiki/Tetrachromacy

    Tetrachromacy. The four pigments in a bird's cone cells (in this example, estrildid finches) extend the range of color vision into the ultraviolet. [1] Tetrachromacy (from Greek tetra, meaning "four" and chroma, meaning "color") is the condition of possessing four independent channels for conveying color information, or possessing four types of ...

  7. Trichromacy - Wikipedia

    en.wikipedia.org/wiki/Trichromacy

    Trichromacy or trichromatism is the possession of three independent channels for conveying color information, derived from the three different types of cone cells in the eye. [1] Organisms with trichromacy are called trichromats. The normal explanation of trichromacy is that the organism's retina contains three types of color receptors (called ...

  8. Apple II graphics - Wikipedia

    en.wikipedia.org/wiki/Apple_II_graphics

    Apple II graphics. Apple II graphics debuted on the original Apple II in 1977 and were used throughout the computer series of the same name. The graphics consist of a 16 color low-resolution mode and a high-resolution mode where visuals are dependent on artifact color. The Apple IIe added "double" versions of each of these, most prominently ...

  9. Dichromacy - Wikipedia

    en.wikipedia.org/wiki/Dichromacy

    Dichromacy (from Greek di, meaning "two" and chromo, meaning "color") is the state of having two types of functioning photoreceptors, called cone cells, in the eyes. Organisms with dichromacy are called dichromats. Dichromats require only two primary colors to be able to represent their visible gamut.

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