Showing 31 open source projects for "compression"

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  • 1
    LZ4

    LZ4

    Extremely fast compression algorithm

    LZ4 is lossless compression algorithm, providing compression speed > 500 MB/s per core (>0.15 Bytes/cycle). It features an extremely fast decoder, with speed in multiple GB/s per core (~1 Byte/cycle). A high compression derivative, called LZ4_HC, is available, trading customizable CPU time for compression ratio. LZ4 library is provided as open-source software using a BSD license.
    Downloads: 229 This Week
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  • 2
    Zstandard

    Zstandard

    Zstandard - Fast real-time compression algorithm

    Zstandard is a fast compression algorithm, providing high compression ratios. It also offers a special mode for small data, called dictionary compression. The reference library offers a very wide range of speed / compression trade-off, and is backed by an extremely fast decoder (see benchmarks below). Zstandard library is provided as open source software using a BSD license.
    Downloads: 59 This Week
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  • 3
    Library and command line tools for XZ and LZMA compressed files
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    Downloads: 73,953 This Week
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  • 4
    PI-Based Image Encoder / Converter

    PI-Based Image Encoder / Converter

    Python code able to convert / compress image to PI (3.14, π) Indexes

    Image processing tool that encodes pixel data as indices within the first 16.7 million digits of PI (π). Features high-performance Numba-accelerated search and a signature 'film-grain' aesthetic upon reconstruction. ZIP also include 16 MB file with 16,7 mil numbers of PI Benchmark(Single-Thread): Hardware & Environment Apple Silicon: Apple M2 (Mac mini/MacBook) x86_64 Platform: Intel Core Ultra 5 225F (Arrow Lake, 10 Cores) OS 1: Fedora 43 (GNOME) OS 2: Windows 11 Pro...
    Downloads: 0 This Week
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  • 5
    libPGF

    libPGF

    libPGF is an implementation of the Progressive Graphics File (PGF)

    The Progressive Graphics File (PGF) is an efficient image file format, that is based on a fast, discrete wavelet transform with progressive coding features. PGF can be used for lossless and lossy compression. It's most suitable for natural images. PGF can be used as a very efficient and fast replacement of JPEG 2000.
    Downloads: 4 This Week
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  • 6
    lzhw

    lzhw

    LZHW Windows command line lossless compression tool for tabular files

    LZHW Command Line Lossless Compression Tool is a Windows command line tool used to compress and decompress files from and to any form, csv, excel etc without any dependencies or installations. Using an optimized algorithm (LZHW) developed from Lempel-Ziv, Huffman and LZ-Welch algorithms. The tool can work in parallel and most of its code is written in Cython, so it is pretty fast.
    Downloads: 0 This Week
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  • 7
    bzip2

    bzip2

    A file compressor/decompressor utility

    bzip2 is a free and open-source file compression program that uses the Burrows–Wheeler algorithm. It only compresses single files and is not a file archiver. It is developed and maintained by Julian Seward. Seward made the first public release of bzip2, version 0.15, in July 1996. The compressor's stability and popularity grew over the next several years, and Seward released version 1.0 in late 2000.
    Downloads: 0 This Week
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  • 8
    WOFF2

    WOFF2

    This document documents how to run the compression reference code

    woff2 is Google’s reference implementation of the WOFF2 webfont format, the modern, highly compressed container used by browsers to ship OpenType/TrueType fonts efficiently over the network. It integrates specialized transforms for font tables (like glyf/loca and variations data) with Brotli compression to squeeze out as many bytes as possible while preserving exact font fidelity on decode. The repository includes a compact C/C++ library and small command-line tools so you can convert existing TTF/OTF files to WOFF2 and back for testing or build pipelines. Its encoder applies deterministic, spec-compliant transformations that maximize compressibility without altering rendering results, making it safe for production web delivery. ...
    Downloads: 6 This Week
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  • 9
    CoRoPa stands for Computational Rough Paths. The aim of CoRoPa is to provide a software framework for various ideas related to Rough Path Theory, including rough differential equations and the digital description of serial data streams.
    Downloads: 0 This Week
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  • 10
    TER implements the CCSDS Recommendation for Image Data Compression (CCSDS 122.0-B-1). TER also adds new features to the Recommendation. TER is designed and programmed with the aim to provide a good basis to test and develop the CCSDS Recommendation.
    Downloads: 1 This Week
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  • 11
    Animal-AV

    Animal-AV

    Animal Algorithm Animation System

    ...Animations can be generated on the fly based on user input - for a large selection of algorithms and topic areas, including, but not limited to, the topic areas of backtracking algorithms, compression, cryptography, basing, searching and sorting.
    Downloads: 0 This Week
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  • 12

    intzip

    Fast compression of integer sets.

    ...The main focus of the algorithm is to encode structural characteristics of a given list, such as coherent intervals and repeated distances. Therefore, the quality of compression depends on diversity rather than size. In most cases, IntZip is able to achieve much better compression results than general compression algorithms on such data sets.
    Downloads: 0 This Week
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  • 13
    ...Šimeček, Daniel Langr, Pavel Tvrdík), In Proceedings of 15th International Symposium on Symbolic and Numeric Algorithms for Scientific Computing (SYNASC 2013), 2013. Minimal Quadtree Format for Compression of Sparse Matrices Storage (I. Šimeček, D. Langr, P. Tvrdik), In 14th International Symposium on Symbolic and Numeric Algorithms for Scientific Computing (SYNASC'2012), 2012.
    Downloads: 0 This Week
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  • 14

    libfgen

    Library for optimization using a genetic algorithm or particle swarms

    libfgen is a library that implements an efficient and customizable genetic algorithm (GA). It also provides particle swarm optimization (PSO) functionality and an interface for real-valued function minimization or model fitting. It is written in C, but can also be compiled with a C++ compiler. Both Linux and Windows are supported.
    Downloads: 0 This Week
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  • 15
    CADI is an implementation of the JPIP standard (JPEG2000 Interactive Protocol - Part 9). CADI includes a JPIP server, a JPIP proxy, and a JPIP Client. CADI is designed and programmed with the aim to provide a flexible framework to test and develop ne
    Downloads: 5 This Week
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  • 16

    SCSU

    Standard Compression Scheme for Unicode

    Standard Compression Scheme for Unicode. Implementation for PHP and JavaScript. See <http://www.unicode.org/reports/tr6/> for detailed information about SCSU. Suitable for better LZF compression for UTF-8 strings Based on Java source of SCSU by Unicode, Inc. <http://www.unicode.org/reports/tr6/> Working example <http://javascriptarchiver.org/>
    Downloads: 0 This Week
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  • 17

    LZF

    LZF compression/decompression for JavaScript

    LZF compression/decompression. Implementation for JavaScript. Compatible with lzf_compress & lzf_decompress PHP functions (see LZF in PECL) Based on C source of LZF functions by Marc Alexander Lehmann <schmorp@schmorp.de> Based on C source of LZF PHP extension by Marcin Gibula <mg@iceni.pl> Working example <http://javascriptarchiver.org/>
    Downloads: 0 This Week
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  • 18

    fqpack

    FASTQ compression

    Provides bitwise, context-based 2nd generation data compression for large FASTQ-based files
    Downloads: 0 This Week
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  • 19
    Command-line tool for identifying and uncompressing a wide array of archive formats. It aims to unlock old and hard-to-find archive types.
    Downloads: 0 This Week
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  • 20
    minidjvu is a DjVu encoder for black-and-white images.
    Downloads: 26 This Week
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  • 21
    OpenDark is a free simplification of 'dark'. It's the first open BWT-DC compressor, which has a simple code, high speed and compression ratio. And it's waiting for your ideas! :)
    Downloads: 0 This Week
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  • 22
    libPPP is an advanced image compression library. Depending on the content of the image, it uses either PGF (Progressive Graphics File) or PNG (Portable Network Graphics) to compress the image.
    Downloads: 0 This Week
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  • 23
    Alternative approach to minimum redundancy coding (fixed-length) without using tree data structures. The main advantages are simplicity and flexibility.
    Downloads: 0 This Week
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  • 24
    Cell Broadband Engine Processor optimized libraries and software from Georgia Tech, for a number of libraries for FFT, MPEG, compression, and encryption. This project also includes patches to accelerate R on the Cell Broadband Engine processor.
    Downloads: 0 This Week
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  • 25
    A library written in C for lossy image compression. Library libopen/format OPEN supports two methods of compression - discrete cosine transform (used in JPEG) and discrete wavelet transform (used in JPEG2000).
    Downloads: 0 This Week
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