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  2. Test card - Wikipedia

    en.wikipedia.org/wiki/Test_card

    Test card. A test card, also known as a test pattern or start-up/closedown test, is a television test signal, typically broadcast at times when the transmitter is active but no program is being broadcast (often at sign-on and sign-off ). [1]

  3. Indian-head test pattern - Wikipedia

    en.wikipedia.org/wiki/Indian-head_test_pattern

    Indian-head test pattern. The Indian-head test pattern is a test card that gained widespread adoption during the black-and-white television broadcasting era as an aid in the calibration of television equipment. It features a drawing of a Native American wearing a headdress surrounded by numerous graphic elements designed to test different ...

  4. Philips circle pattern - Wikipedia

    en.wikipedia.org/wiki/Philips_circle_pattern

    The Philips circle pattern (also referred to as the Philips pattern or PTV Circle pattern) refers to a family of related electronically generated complex television station colour test cards. The content and layout of the original colour circle pattern was designed by Danish engineer Finn Hendil [ da] (1939–2011) [1] in the Philips TV & Test ...

  5. Shadow mapping - Wikipedia

    en.wikipedia.org/wiki/Shadow_mapping

    To test a point against the depth map, its position in the scene coordinates must be transformed into the equivalent position as seen by the light. This is accomplished by a matrix multiplication . The location of the object on the screen is determined by the usual coordinate transformation , but a second set of coordinates must be generated to ...

  6. 12 Tips for Computer Eye Strain Relief - Healthline

    www.healthline.com/.../computer-use

    headaches. neck and shoulder pain. Here are 12 steps you can take to reduce eye dryness and strain. 1. Adjust your glasses. If you wear glasses, talk with your eye doctor about anti-reflective ...

  7. Picture line-up generation equipment - Wikipedia

    en.wikipedia.org/wiki/Picture_line-up_generation...

    For televisions the picture line-up generation equipment ( PLUGE or pluge) is the greyscale test patterns used in order to adjust the black level and contrast of the picture monitor. Various PLUGE patterns can be generated, the most common consisting of three vertical bars of super-black, normal black, and near-black and two rectangles of mid ...

  8. Antinuclear Antibodies (ANA) Test: Results, Positive vs ...

    www.webmd.com/a-to-z-guides/what-is-an...

    Antinuclear Body Test Risks. The blood test has very few risks. You might feel a slight sting as your blood is drawn. You may notice a small bruise later.. You may also have a slight chance of:

  9. Digital pattern generator - Wikipedia

    en.wikipedia.org/wiki/Digital_pattern_generator

    Digital pattern generator. A digital pattern generator is a piece of electronic test equipment or software used to generate digital electronic stimuli. Digital electronics stimuli are a specific kind of electrical waveform varying between two conventional voltages that correspond to two logic states ("low state" and "high state", "0" and "1").

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