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  2. Image compression - Wikipedia

    en.wikipedia.org/wiki/Image_compression

    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 ...

  3. JPEG - Wikipedia

    en.wikipedia.org/wiki/JPEG

    JPEG (/ ˈdʒeɪpɛɡ / JAY-peg, short for Joint Photographic Experts Group) [2] is a commonly used method of lossy compression for digital images, particularly for those images produced by digital photography. The degree of compression can be adjusted, allowing a selectable tradeoff between storage size and image quality.

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

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

    Making an image that was incorrectly saved as JPEG fit for saving as PNG. Suppose you have a map for an island that was inadvertently saved as JPEG. Looks OK, if a bit fuzzy. 1. In your bitmap graphics editor, set your fuzzy selection ("magic wand") tool so that it only will select pixels of exactly the same color. (Here: Threshold = 0) 2.

  5. Image file format - Wikipedia

    en.wikipedia.org/wiki/Image_file_format

    Image file format. An image file format is a file format for a digital image. There are many formats that can be used, such as JPEG, PNG, and GIF. Most formats up until 2022 were for storing 2D images, not 3D ones. The data stored in an image file format may be compressed or uncompressed. If the data is compressed, it may be done so using lossy ...

  6. JPEGmini - Wikipedia

    en.wikipedia.org/wiki/JPEGmini

    Website. jpegmini .com. JPEGmini is a photo compression tool developed by Beamr Imaging Ltd released in 2012 for Mac and Windows. It designed to reduce the file size of images and videos with limited quality reduction. [1] [2] [3]

  7. JPEG 2000 - Wikipedia

    en.wikipedia.org/wiki/JPEG_2000

    JPEG 2000 (JP2) is an image compression standard and coding system. It was developed from 1997 to 2000 by a Joint Photographic Experts Group committee chaired by Touradj Ebrahimi (later the JPEG president), [1] with the intention of superseding their original JPEG standard (created in 1992), which is based on a discrete cosine transform (DCT), with a newly designed, wavelet-based method.

  8. Wikipedia talk:Preparing images for upload - Wikipedia

    en.wikipedia.org/wiki/Wikipedia_talk:Preparing...

    For very small images (under 50x50 or so), png is probably best for any circumstance, since it preserves good clarity at small sizes. (not lossy) Reduce the number of colors for png. If the image only has black and white or very few colors in it, you can probably cut it down to 8-bit or lower color depth.

  9. Generation loss - Wikipedia

    en.wikipedia.org/wiki/Generation_loss

    Generation loss is the loss of quality between subsequent copies or transcodes of data. Anything that reduces the quality of the representation when copying, and would cause further reduction in quality on making a copy of the copy, can be considered a form of generation loss. File size increases are a common result of generation loss, as the ...

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