Search Results for "algorithm"
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Showing 52 open source projects for "algorithm"
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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. -
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Brotli
Brotli compression format
...This happens when "one-shot" decoding API is used (or input chunk for streaming API is not limited), input size (chunk size) is larger than 2GiB, and input contains uncompressed blocks. After the overflow happens, memcpy is invoked with a gigantic num value, that will likely cause the crash. Brotli is a generic-purpose lossless compression algorithm that compresses data using a combination of a modern variant of the LZ77 algorithm, Huffman coding and 2nd order context modeling, with a compression ratio comparable to the best currently available general-purpose compression methods. It is similar in speed with deflate but offers more dense compression. The specification of the Brotli Compressed Data Format is defined in RFC 7932. ... -
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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. -
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FractalImageCompression
Java Fractal Image Compression based on Delaunay triangulation
Implementation of the algorithm of the paper: "Fractal image compression based on Delaunay triangulation and vector quantization" It is a Fractal compression algorithm, based on relationships between regions of the image (in this case triangles), rather than in explicitly the pixel values themselves. Video demo: https://frojasg1.com:8443/resource_counter/resourceCounter? -
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HashSum is a .NET port from GNU's md5sum and sha1sum. It supports: hash algorithm selection between MD5 and SHA1 (more could be added later) and compatibility between HashSum and GNU's checksum file format
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Crunch
Insane(ly slow but wicked good) PNG image optimization
Crunch is an image compression tool for lossy PNG image file optimization. Using a combination of selective bit depth, color palette reduction and color type, as well as zopfli DEFLATE compression algorithm encoding that employs the pngquant and zopflipng PNG optimization tools, Crunch is effectively able to optimize and compress images with minimal decrease in image quality. While it may produce file size gains larger than those produced by lossless approaches, the impact on image quality is often imperceptible, and optimized file sizes are still significantly lower than the original. -
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DuplicatedFile
Find out duplicate files
Discovers duplicate files within a folder or disk and saves the list of discovered files to a file. -
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Hex Encoding Utility
An utility that allows you to convert your data using Base16 encoding.
...The utility has many options that allow you to customize the process of encoding and outputting data. Application input can be obtained from files, command line, keyboard or by redirecting output from another console application. The Base16 algorithm provides encoding in such a way that each byte of data is split into two 4-bit values and represented by two hexadecimal digits. Also, this utility can restore the original data from text containing a hex dump. Base16 can be useful for developers, system administrators, and other professionals who work with binary files or data. ... -
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clzw
Implementation of LZW compression algorithm in C
Simple, fast implementation of LZW (Lempel–Ziv–Welch) data compression algorithm in C. - Console encoder/decoder tools - OS independent - Could be used in embedded projects - Works with raw code-stream LZW features: - Hardcoded dictionary size - Variable code size - Code search is performed by hash table and embedded in dictionary linked lists (encoder) - No dynamic memory allocation -
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...So, it only works on NTFS volumes. With that, you can rename, copy or move your files (to another NTFS volume) without losing the hashes, and without needing to do anything else. The Whirlpool algorithm is a strong 512-bit hash function. This tool uses several optimized implementations with SSE4.1 or SSE2 instructions when available. Each folder is recursively processed. You can use drag-and-drop, mix files and folders, pause and resume. 64-bit: https://sourceforge.net/projects/whirlpoolfilech/files/0.5/WFileCheck64.exe 32-bit: https://sourceforge.net/projects/whirlpoolfilech/files/0.5/WFileCheck32.exe At first use, please let the integrated benchark determine the fastest procedure for your hardware. ...
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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. It is based on python lzhw library. Full tool documentation can be found at: https://mnoorfawi.github.io/lzhw/6%20Using%20the%20lzhw%20command%20line%20tool/ While the documentation for the python library is at: https://mnoorfawi.github.io/lzhw/ -
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Ank Zipper
A free and easy-to-use password protected file archiver
...Ank Zipper can compress both files and folders and create password-protected archives, in order to prevent unauthorized access to important files. Additionally, it can be used for extracting or simply browsing ZIP files.It includes AES(Advanced Encryption Standard) algorithm to encrypt/decrypt file(s). Ank Zipper is a cross-platform software that can be used on any platform that features Java compatibility (e.g. Mac OS X, Linux, Windows). -
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Manifest Maker
Python app to create plain text manifest from files
Manifest Maker is a graphical Python application which takes a file or group of files and creates a plain text manifest list of each item. The manifest includes the file name (including directory structure) as well as a checksum of the file. (No longer maintained) -
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Recursive Directory Removal
Recursive Directory Removal
https://github.com/mhisoft/rdpro -
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x_Cleaner
Utility to sector-level cleaning your storage with special algorithm.
...Russian GOST R-50739-95 (1-st pass 0x0, 2-nd pass-random values) 4. US DoD 5220.22-M(E) (1-st pass 0x0, 2-nd pass 0x1 and 3-d pass - random values) 5. Bruce Schneier's algorithm (1-st pass 0x1, 2-nd pass 0x0, 3-7 passes - random values) x_Cleaner works for Windows XP, Vista,7 and later versions. -- Important! Run x_Cleaner with administrative rights in order to clean non-removable media. -
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The Encode
Encode your text files
This software is intended to encode your text files efficiently. You can decode them later using the same algorithm you used to encode it. Encode is professionalism packed simply and freely. You can use Encode for any non-illegal purposes. You can make any number of copies and redistribute Encode as it is. -
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MicroZip
Create,extract and encrypt ZIP,GZIP,TAR,BZIP2,TAZ files on Java mobile
...MicroZip allows you to extract selected files without extracting the whole ZIP archive. MicroZip also supports encrypted ZIP archives with both classic ZIP encryption and AES 256 encryption algorithm. -
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File Locker
Lock and unlock files easily in Windows
...You can just right click on a file and immediately lock it with your password. And when a file is locked, you can just double click it and enter your password to open it. It uses serious encryption algorithm, so be careful with your password! If you forget it, your file might permanently get unlockable. -
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A Disk Scheduling Simulator tool. With an intuitive GUI interface and command line functionality. Built using both VC and VB. Currently supports SSTF,LOOK,CLOOK,SCAN and CSCAN algorithms. Rotational latency is also optionally supported.
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House Party Protocol
an ultimate evidence wiper
It's a open source file wiper program which can get commands remotely and acts in emergency stiuations. Program's name inspired by Iron Man 3 movie where Tony Stark activates the "House Party Protocol" when his house is destroyed. It's written for preventing your private datas captured by police or thieves. *Usage* - You need to have a hosting account which can run php scripts (you can register for a free one) Change the $password section in base.php and upload it to your hosting with... -
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Universal File Splitter & Joinner
the Powerfull, Beautiful file Splitter
Easy, Lighweight, Free for Sharing and Archieving Universal File Splitter and Joiner is a powerful file splitter and joiner utility that can split a big file into small pieces, then can be joined latter to get the original file, also check Identical for both Source and Joined file. provides many signature algorithm. This application requires- * .NET framework 4.0 -
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Text Zip
This software zips and unzips a text file
This software zips and unzips a .txt file, using the Huffman encoding algorithm and the list and tree data structures. The result files are named zippedFile.txt and unzippedFile.txt and can be found at the same directory as the Text Zip executable file. -
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LZWStream
The LZW algorithm in C#
Implementation of the LZW algorithm in C#, adhering to the built-in System.IO.Compression. The algorithm and code is much improved, compared to projects like SharpLZW. The LZW algorithm is for arbitrary lossless data compression and are noticeable for simplicity and low (compared to others) memory consumption. Making it interesting for eg. embedded use. -
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SafePassDB
Protect your personal data with SafePassDB.
...SafePassDB is a free multi-platform software application written in Java programming language that will enable you to protect all of your personal data with one "Master Password" using AES (Advanced Encryption Standard). SafePassDB is light weight and super easy to use! Current version of the software uses 128 bit AES (Advanced Encryption Standard) algorithm, which is a standard by U.S. National Institute of Standards and Technology (NIST), for protecting your personal data. IMPORTANT: In order to run SafePassDB you need to have Java installed on your computer. Java is free and can be downloaded from - http://www.java.com/ -
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Use of Michael Rabin's Information Dispersal Algorithm to provide secure, dispersed storage in a networked environment. For full download, please get both Math-FastGF2 and Crypt-IDA releases under the files link. See project wiki for more information.