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  2. 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.

  3. Wikipedia:Preparing images for upload - Wikipedia

    en.wikipedia.org/wiki/Wikipedia:Preparing_images...

    There are 4 basic choices for image file formats : SVG for simple diagrams (especially those that need to be scaled). JPEG for photographic images. GIF for animated images. PNG for everything else. While some formats offer multiple compression systems, in general the format and the compression system are tied together.

  4. Free Lossless Image Format - Wikipedia

    en.wikipedia.org/wiki/Free_Lossless_Image_Format

    Free Lossless Image Format (FLIF) is a lossless image format claiming to outperform PNG, lossless WebP, lossless BPG and lossless JPEG 2000 in terms of compression ratio on a variety of inputs. [4]

  5. libjpeg - Wikipedia

    en.wikipedia.org/wiki/Libjpeg

    libjpeg is a free library with functions for handling the JPEG image data format. It implements a JPEG codec (encoding and decoding) alongside various utilities for handling JPEG data. It is written in C and distributed as free software together with its source code under the terms of a custom permissive ( BSD -like) free software license ...

  6. 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.

  7. File:Comparison between JPEG, JPEG 2000 and JPEG XR.png

    en.wikipedia.org/wiki/File:Comparison_between...

    Then, this PNG version is converted to each of the aforementioned picture file formats. Each photo is 400x480 in size. The basic JPEG is the worst at compression but JPEG XR and JPEG 2000 are very similar. The JPEG 2000 is a bit on the brighter side and tends to do a better job at blending the pixels. The black areas in the JPEG XR develop a ...

  8. 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.

  9. Template:Convert-to-PNG - Wikipedia

    en.wikipedia.org/wiki/Template:Convert-to-PNG

    This template is used to tags JPEG's to being converted to PNG's. The above documentation is transcluded from Template:Convert-to-PNG/doc. ( edit | history) Editors can experiment in this template's sandbox ( create | mirror) and testcases ( create) pages. Add categories to the /doc subpage. Subpages of this template.

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