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Basics of image editing. Raster images are stored in a computer in the form of a grid of picture elements, or pixels. These pixels contain the image's color and brightness information. Image editors can change the pixels to enhance the image in many ways. The pixels can be changed as a group, or individually, by the sophisticated algorithms ...
Instead, just eliminate JPEG artifacts as much as possible and convert to 24-bit PNG. Using the posterize option of your graphics editor with a high setting (like 40) may further reduce filesize and eliminate more artifacts without visibly reducing image quality. You can try using pngquant on the 24-bit result; this produces indexed mode images ...
They can be used to remove background noise from any audio signal, including magnetic tape recordings and FM radio broadcasts, reducing noise by as much as 10 dB. They can also be used in conjunction with other noise reduction systems, provided that they are used prior to applying DNR to prevent DNR from causing the other noise reduction system ...
On 26 May 2024 the Israeli Air Force struck the Tel al-Sultan refugee camp in western Rafah. According to the Gaza Health Ministry, the attack killed between 45 and 50 Palestinians and injured over 200 after a fire started inside the camp. Satellite imagery indicated the location of the airstrike was a refugee tent camp called the "Kuwait Peace ...
Removal of non-free images. The ninth item of Wikipedia’s policy for non-free content states that non-free images should only be used in the article namespace (not disambiguation pages), and goes further into the underlying reasons for the policy.
When in doubt, remove too little rather than removing too much. A clue that you might have removed too much noise is hearing "bubbles" ("speaking in a glass"-like sounds) in the recording. If so, go to Edit and then Undo and try again with a lower setting. Even at the lowest setting, this tool should remove all audible background buzz.