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2. Dark-frame subtraction - Wikipedia

   en.wikipedia.org/wiki/Dark-frame_subtraction

   Dark-frame subtraction has been applied to the left half of the image. The right half is directly from the image sensor. A dark frame is an image captured with the sensor in complete darkness (i.e. with a closed shutter or the lens and viewfinder capped). Such a dark frame is essentially an image of noise produced by the sensor. A dark frame ...

3. Median filter - Wikipedia

   en.wikipedia.org/wiki/Median_filter

   The median filter is a non-linear digital filtering technique, often used to remove noise from an image, [1] signal, [2] and video. [3] Such noise reduction is a typical pre-processing step to improve the results of later processing (for example, edge detection on an image).

4. Image noise - Wikipedia

   en.wikipedia.org/wiki/Image_noise

   Image noise can also originate in film grain and in the unavoidable shot noise of an ideal photon detector. Image noise is an undesirable by-product of image capture that obscures the desired information. Typically the term “image noise” is used to refer to noise in 2D images, not 3D images.

5. Geometric mean filter - Wikipedia

   en.wikipedia.org/wiki/Geometric_mean_filter

   The geometric mean filter is an image filtering process meant to smooth and reduce noise of an image. [1] It is based on the mathematic geometric mean.The output image G(x,y) of a geometric mean is given by

6. Total variation denoising - Wikipedia

   en.wikipedia.org/wiki/Total_variation_denoising

   The regularization parameter plays a critical role in the denoising process. When =, there is no smoothing and the result is the same as minimizing the sum of squares.As , however, the total variation term plays an increasingly strong role, which forces the result to have smaller total variation, at the expense of being less like the input (noisy) signal.

7. Hate background noise during video calls? Krisp is the ... - AOL

   www.aol.com/hate-background-noise-during-video...

   TL;DR: Banish background noise with the Krisp AI-powered noise cancellation app. As of Aug. 5, try Krisp for free with 240 minutes per week of microphone and speaker noise removal.For obvious and ...