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Noise, static or snow screen captured from a blank VHS tape. Noise, commonly known as static, white noise, static noise, or snow, in analog video, CRTs and television, is a random dot pixel pattern of static displayed when no transmission signal is obtained by the antenna receiver of television sets and other display devices.
A random vector (that is, a random variable with values in R n) is said to be a white noise vector or white random vector if its components each have a probability distribution with zero mean and finite variance, [clarification needed] and are statistically independent: that is, their joint probability distribution must be the product of the ...
An illusion closely related to the checker shadow illusion, which also relies on using implied visual shadows to seemingly darken a brighter region to the same color as a well-lit dark region, involves two squares placed at an angle, with the darker square being lit and the lighter square at an angle which receives poor light. [2]
The "white square" was introduced on television in France in March 1961, [1] shortly after the broadcast of Maurice Cazeneuve's drama L'Exécution, in which a nude female appeared for a few seconds. [2] Its role was to warn viewers that the content shown on-screen was not "for all audiences".
The TNO random dot stereotest (short: TNO stereo test or TNO test) is similar to the randot stereotest but is an anaglyph in place of a vectograph; that is, the patient wears red-green glasses (in place of the polarizing glasses used in the randot stereotest). Like other random dot stereotests, the TNO test offers no monocular clues. [4]
In a typical digital on-screen graphic, the station's logo appears in a corner of the screen (in this simulated example, the bottom-right) A digital on-screen graphic , digitally originated graphic ( DOG , bug , [ 1 ] network bug , or screenbug ) is a watermark-like station logo that most television broadcasters overlay over a portion of the ...
The left and right eye see different, seemingly random, dot patterns; a person viewing through both eyes sees a combination of both left and right visual field disturbances. While seeing the phenomenon, lightly pressing inward on the sides of the eyeballs at the lateral canthus causes the movement to stop being fluid and the dots to move only ...
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