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  2. Perlin noise - Wikipedia

    en.wikipedia.org/wiki/Perlin_noise

    Two-dimensional slice through 3D Perlin noise at z = 0. Perlin noise is a type of gradient noise developed by Ken Perlin in 1983. It has many uses, including but not limited to: procedurally generating terrain, applying pseudo-random changes to a variable, and assisting in the creation of image textures.

  3. Image noise - Wikipedia

    en.wikipedia.org/wiki/Image_noise

    Noise visible in an image from a digital camera. 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 ...

  4. Noise generator - Wikipedia

    en.wikipedia.org/wiki/Noise_generator

    Zener diode based noise source. A noise generator is a circuit that produces electrical noise (i.e., a random signal). Noise generators are used to test signals for measuring noise figure, frequency response, and other parameters. Noise generators are also used for generating random numbers. [1]

  5. White noise - Wikipedia

    en.wikipedia.org/wiki/White_noise

    An image of salt-and-pepper noise. In discrete time, white noise is a discrete signal whose samples are regarded as a sequence of serially uncorrelated random variables with zero mean and finite variance; a single realization of white noise is a random shock.

  6. Worley noise - Wikipedia

    en.wikipedia.org/wiki/Worley_noise

    Worley noise, also called Voronoi noise and cellular noise, is a noise function introduced by Steven Worley in 1996. Worley noise is an extension of the Voronoi diagram that outputs a real value at a given coordinate that corresponds to the Distance of the nth nearest seed (usually n=1) and the seeds are distributed evenly through the region.

  7. Colors of noise - Wikipedia

    en.wikipedia.org/wiki/Colors_of_noise

    Velvet noise is a sparse sequence of random positive and negative impulses. Velvet noise is typically characterised by its density in taps/second. At high densities it sounds similar to white noise; however, it is perceptually "smoother". [12]

  8. List of noise topics - Wikipedia

    en.wikipedia.org/wiki/List_of_noise_topics

    Comfort noise generator; Cosmic noise; Crackling noise; DBa; DBrn; Decibel; Detection theory; Dither; Dynamic range; Effective input noise temperature; Environmental noise; Equivalent noise resistance; Equivalent pulse code modulation noise; Errors and residuals in statistics; Fixed pattern noise; Flicker noise; Gaussian noise; Generation ...

  9. Pseudorandom noise - Wikipedia

    en.wikipedia.org/wiki/Pseudorandom_noise

    Like random noise, the local sequence has a very low correlation with any other sequence in the set, or with the same sequence at a significantly different time offset, or with narrow band interference, or with thermal noise. Unlike random noise, it must be easy to generate exactly the same sequence at both the transmitter and the receiver, so ...

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