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  2. Noise (video) - Wikipedia

    en.wikipedia.org/wiki/Noise_(video)

    Noise (video) Noise in a CRT television (top) and flat screen television (bottom) Noise, static or snow screen captured from a VHS tape. Noise, commonly known as static, white noise, static noise, or snow, in analog video and television, is a random dot pixel pattern of static displayed when no transmission signal is obtained by the antenna ...

  3. Chroma key - Wikipedia

    en.wikipedia.org/wiki/Chroma_key

    Chroma key compositing, or chroma keying, is a visual-effects and post-production technique for compositing (layering) two or more images or video streams together based on colour hues ( chroma range). The technique has been used in many fields to remove a background from the subject of a photo or video – particularly the newscasting, motion ...

  4. Image noise - Wikipedia

    en.wikipedia.org/wiki/Image_noise

    Image noise. Image noise is random variation of brightness or color information in images, and is usually an aspect of electronic noise. It can be produced by the image sensor and circuitry of a scanner or digital camera. Image noise can also originate in film grain and in the unavoidable shot noise of an ideal photon detector. Image noise is ...

  5. Closed-eye hallucination - Wikipedia

    en.wikipedia.org/wiki/Closed-eye_hallucination

    Closed-eye hallucination. Closed-eye hallucinations and closed-eye visualizations ( CEV) are hallucinations that occur when one's eyes are closed or when one is in a darkened room. They should not be confused with phosphenes, perceived light and shapes when pressure is applied to the eye's retina, or some other non-visual external cause ...

  6. Visual snow syndrome - Wikipedia

    en.wikipedia.org/wiki/Visual_snow_syndrome

    Uncommon (understudied) Visual snow syndrome ( VSS) is an uncommon neurological condition in which the primary symptom is that affected individuals see persistent flickering white, black, transparent, or colored dots across the whole visual field. [ 7][ 4] Other common symptoms are palinopsia, enhanced entoptic phenomena, photophobia, and ...

  7. Visual effects - Wikipedia

    en.wikipedia.org/wiki/Visual_effects

    A period drama set in Vienna uses a green screen as a backdrop, to allow a background to be added during post-production. Special effects : Special effects (often abbreviated as SFX, SPFX, F/X or simply FX) are illusions or visual tricks used in the theatre , film , television , video game and simulator industries to simulate the fictional ...

  8. Color Graphics Adapter - Wikipedia

    en.wikipedia.org/wiki/Color_Graphics_Adapter

    This allows for some variation, as well as flashing effects, as the background color can be changed without having to redraw the screen (i.e. without changing the contents of the video RAM). In text mode, the border color (displayed outside the regular display area and including the overscan area) can be changed from the default black to any of ...

  9. At least 30 inches of snow possible in parts of U.S. in ... - AOL

    www.aol.com/news/least-30-inches-snow-possible...

    Lake-effect snow occurs when a cold air mass flows over top of the still relatively warm and ice-free Great Lakes. The temperature difference creates clouds and eventually snow that falls downwind ...

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