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2. Wikipedia:Non-free content/Image size calculator - Wikipedia

   en.wikipedia.org/.../Image_size_calculator

   Upload file; Search. Search. Appearance. ... Non-free content/Image size calculator. Add languages. ... Text is available under the Creative Commons Attribution ...

3. Help : How to reduce colors for saving a JPEG as PNG

   en.wikipedia.org/wiki/Help:How_to_reduce_colors...

   If the new version is too sharp, you can utilize the blur filter or tool to fix this, or use Colors > Levels to mess with the Alpha channel. Once it looks correct, save the image as a PNG. Then, to reduce file size, run it through a program like ImageMagick that supports 8-bit PNGs with alpha transparency, in order to remove any unnecessary ...

4. Wikipedia : Featured picture criteria/Image size

   en.wikipedia.org/.../Image_size

   Compression of an image to reduce file size (in Kb) is usually "lossy" and is not advised for featured pictures. Image compression will reduce download times and save disk space, but it does so at the expense of fine detail and overall image quality. If in doubt, when saving JPEG files, always select the "maximum" quality setting.

5. File:Ansett WA BAe 146-200 PER Wheatley-1.jpg - Wikipedia

   en.wikipedia.org/wiki/File:Ansett_WA_BAe_146-200...

   Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 only as published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.

6. Image compression - Wikipedia

   en.wikipedia.org/wiki/Image_compression

   Image compression is a type of data compression applied to digital images, to reduce their cost for storage or transmission. Algorithms may take advantage of visual perception and the statistical properties of image data to provide superior results compared with generic data compression methods which are used for other digital data. [1]

7. Wikipedia:Autosizing images - Wikipedia

   en.wikipedia.org/wiki/Wikipedia:Autosizing_images

   The users can set their Special:Preferences to select their default image size (such as: 250px, 180px, or 120px), for whichever handheld device they use for viewing Wikipedia pages. Autosizing of images will also allow sight-impaired users, per WP:Access, to enlarge their default image-size (such as 300px) to perhaps see details more clearly.

8. Data compression - Wikipedia

   en.wikipedia.org/wiki/Data_compression

   For example, an image may have areas of color that do not change over several pixels; instead of coding "red pixel, red pixel, ..." the data may be encoded as "279 red pixels". This is a basic example of run-length encoding; there are many schemes to reduce file size by eliminating redundancy.

9. JPEG - Wikipedia

   en.wikipedia.org/wiki/JPEG

   This is an accepted version of this page This is the latest accepted revision, reviewed on 9 February 2025. Lossy compression method for reducing the size of digital images For other uses, see JPEG (disambiguation). "JPG" and "Jpg" redirect here. For other uses, see JPG (disambiguation). JPEG A photo of a European wildcat with the compression rate, and associated losses, decreasing from left ...