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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. Noise reduction - Wikipedia

   en.wikipedia.org/wiki/Noise_reduction

   Noise reduction is the process of removing noise from a signal. Noise reduction techniques exist for audio and images. Noise reduction algorithms may distort the signal to some degree. Noise rejection is the ability of a circuit to isolate an undesired signal component from the desired signal component, as with common-mode rejection ratio.

5. Category:Image noise reduction techniques - Wikipedia

   en.wikipedia.org/wiki/Category:Image_noise...

   This category collects Wikipedia articles on techniques for removal or reduction of noise and artifacts from images and multi-dimensional data. Pages in category "Image noise reduction techniques" The following 19 pages are in this category, out of 19 total.

6. 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 ...

7. How to use iPhone's mic mode for crystal-clear, noise-free calls

   www.aol.com/news/iphones-mic-mode-crystal-clear...

   Here’s a question from Debbie in Half Moon Bay that sums up the experience of many users: "Since I updated Apple software to iOS 18.0.1, I can no longer remove background noise while on the ...