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  2. pngcrush - Wikipedia

    en.wikipedia.org/wiki/Pngcrush

    The main purpose of pngcrush is to reduce the size of the PNG IDAT data stream by trying various combinations of compression methods and delta filters. It can also be used for various manipulations of PNG images, such as changing the bit depth , removing unwanted ancillary chunks , or adding certain chunks including gAMA, tRNS, iCCP, and ...

  3. PNG - Wikipedia

    en.wikipedia.org/wiki/PNG

    TIFF also supports the compression algorithm PNG uses (i.e. Compression Tag 0008 16 'Adobe-style') with medium usage and support by applications. TIFF also offers special-purpose lossless compression algorithms like CCITT Group IV, which can compress bilevel images (e.g., faxes or black-and-white text) better than PNG's compression algorithm.

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

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

    JPEG's compression method takes advantage of the fact that most natural scenes have smooth gradients and soft edges, and so is optimized for that. PNG, however, uses lossless compression , which means that it saves every pixel exactly as it was drawn, which is ideal for iconic images such as graphs, flags, maps, and cartoons and for images ...

  5. PNGOUT - Wikipedia

    en.wikipedia.org/wiki/PNGOUT

    PNGOUT is a freeware command line optimizer for PNG images written by Ken Silverman. The transformation is lossless, meaning that the resulting image is visually identical to the source image. According to its author, this program can often get higher compression than other optimizers by 5–10%. [3]

  6. 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 ]

  7. Image file format - Wikipedia

    en.wikipedia.org/wiki/Image_file_format

    FLIF (Free Lossless Image Format) — a discontinued lossless image format which claims to outperform PNG, lossless WebP, lossless BPG and lossless JPEG 2000 in terms of compression ratio. It uses the MANIAC (Meta-Adaptive Near-zero Integer Arithmetic Coding) entropy encoding algorithm, a variant of the CABAC (context-adaptive binary arithmetic ...

  8. Lossless compression - Wikipedia

    en.wikipedia.org/wiki/Lossless_compression

    Download QR code ; Print/export ... Lossless compression is a class of data compression that allows the ... Some image file formats, like PNG or GIF, use only ...

  9. WebP - Wikipedia

    en.wikipedia.org/wiki/WebP

    WebP is a raster graphics file format developed by Google intended as a replacement for JPEG, PNG, and GIF file formats. It supports both lossy and lossless compression, [8] as well as animation and alpha transparency. Google announced the WebP format in September 2010, and released the first stable version of its supporting library in April 2018.

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