Author Page
Estimating entropy rates with Bayesian confidence intervals
I’m pleased to announce with my co-authors availability of a preprint on our new algorithm to estimate the Shannon entropy rate (bits/symbol) or (bits/sec) of an observed sequence of low-alphabet symbols. It uses the Context-Tree-Weighting universal compression method, but doesnot use the compression ratio directly as an entropy estimator but as a scaffold for a […]
ftp://lyapunov.ucsd.edu/pub/nonlinear/bayesian_information/Kennel_Shlens_et_al_2004.pdf
ImageMagick
ImageMagick is a robust collection of tools and libraries offered under a free license to read, write, and manipulate an image in many image formats (over 87 major formats) including popular formats like TIFF, JPEG, PNG, PDF, PhotoCD, and GIF. Programming interfaces are provided for C/C++, Java, Perl, VB, and more.
Version 6.0.3 is shipping in […]
UPX - the Ultimate Packer for eXecutables
Markus F.X.J. Oberhumer & László Molnár have created an executable packer that works on DOS, Linux, and Windows executables.
A DCL user had this to say: UPX is just excellent - and it’s free.
UPX 1.25 is shipping as of June, 2004.
Zipdiff
Use the zipdiff tool when you need to compare the contents of two zip files. It is equally suited for comparing jar files, EAR files, WAR files or RAR files. Run it standalone or as an Ant task. The tool supports three output formats: plain text, XML, and HTML. zipdiff is written in Java.
Release […]
The Heirloom Toolchest
The Heirloom Toolchest includes Open Source cpio and tar implementations running on Linux, Solaris, and Open UNIX. cpio is able to read and write all known Unix cpio archive formats, including proprietary ones, and zip files, including support for the zip64 format.
The most recent update of the project was on June 30, 2004.
p7zip
p7zip is a quick port of 7za.exe (command line version of 7zip, see www.7-zip.org) for Unix. 7-Zip is a file archiver with highest compression ratio.
Version 0.81 is shipping as of July, 2004.
Demasoni
Demasoni is working on a revolutionary new data compression method, using something called the Starr Transform.
Remote Sessions with NX
NxServLiv allow compressed remote X sessions using NoMachine’s NX oss libraries. Like ssh terminal but graphical. Work from Modem to Lan with different compression ratios
MP3 Streaming DownSampler for PHP
The MP3 Streaming DownSampler for PHP is written with cable modem/DSL users with low upstream caps in mind. Using LAME, it dynamically downsamples a requested MP3 to a bitrate which can be streamed. It doesn’t use temporary files, so you don’t have to take the time to do any batching, and you just give it […]
VideoNet
A video conferencing project for Windows PCs using an H.263 video codec.
Jspeex
This project is an attempt to port the free Speex voice codec to a pure Java implementation.
Version 0.9.4 is shipping as of June, 2004.
DevIL - A full featured cross-platform image library
DevIL provides the code needed to load a wide variety of images into your program. A nice long list of images that can be loaded are listed here, and a smaller but still quite nice list of formats that can be written to. Displaying images is currently supported under OpenGL, Windows GDI, SDL, DirectX, and […]
Loading JPG & PNG resources using GDI+
An article on the CodeProject detailing a user’s troubles with GDI+. In particular, he found that he was unable to load JPG or PNG files stored as resources with GDI+. This article presents a way to make it happen.
This article was updated June 17, 204.
PNGWriter
I can’t imagine a better description of this product than is found on the first line of their web page: “PNGwriter is a C++ class for creating PNG images.” And yes, it’s a free library, and it’s portable as all get-out, working on Win32, Linux, Mac OS X, and more.
Version 0.4.0 shipped in June, 2004.
ZLib dotNet
Microsoft .NET Stream-derived objects that wrap ZLib inflate and deflate functions (C++ Mixed Mode implementation)
Version 1.0.1 is shipping as of June, 2004.
Peter’s Backup
Peters Backup is a program for backing up your important data files on to diskette, zip drive, fixed disk or CD/RW. It uses an extremely efficient compression algorithm. It keeps track of all versions of your files in full and incremental backups.
Version 1.16 is shipping as of June, 2004.
A Compressed Bitset Class
We have developed the CMJBitset class as a plug-in replacement for bitset. The CMJBitset classm depending on compilation optionsm may take as little as 7 bytes to represent a bitset of any size, assuming all the bits are set or reset. In comparision, a 1024 bitset will take 128 bytes. In essence, the CMJBitset operates […]
Sixlegs PNG Library
Sixlegs PNG Library is a Java 1.1-compatible PNG decoder which features full compliance with the latest PNG specification. It supports all valid bit depths (grayscale/color), interlacing, palette-indexed images, alpha/transparency, gamma correction, access to all standard chunk data, private chunk handling, progressive display, and more
Zip Utils - clean, elegant, simple, C++/win32
This source code shows how to add zip/unzip functionality to your programs. Claim to fame: simplicity and clean packaging.
MemoryStream Compression
An article that describes MemoryStream based Compression based on SharpZipLib.
Last updated June 21, 2004.
PNG/MNG Construction Set
PNG/MNG Construction Set represents the state of the art in animation software. It will assemble your original animations effortlessly through its Animation Wizard, squeeze them down to as close to nothing as possible with its Supercompressor; create eyecatching banners and animated transitions; manage your MNG files; add transparency to existing PNG graphics and a lot […]
JBIG Kit
Markus Kuhn has this to say about it: I wrote the freely available JBIG-KIT 1.2 portable ANSI C library, which implements a highly effective lossless bi-level image compression algorithm based on context sensitive arithmetic coding. The JBIG algorithm (specified in ITU-T Recommendation T.82), which is implemented in this library, is especially suitable for compressing scanned […]
ZipEnable for IIS
Unlike the compression built into IIS 4 and 5 (Windows NT/2000), IIS 6.0 offers out-of-the-box compression embedded into the core Web server code itself, allowing for extremely fast HTTP compression with minimal resource penalties.
Version 2.0 is shipping as of May, 2004.
Java FLAC Codec
FLAC is a port of the Free Lossless Audio Codec (FLAC) library to Java. This library allows java developers to experiment and write programs that use the FLAC algorithms.
Version 0.5 is shipping as of June, 2004.
Self-Extracting Archive Utility
This program from Gammadyne is used to create a professional quality installation program out of an archive file.
Version 11.3 was shipping as of June, 2004.
PJL Compressing Filter
A J2EE servlet filter which compresses data written to the response. It supports several algorithms (gzip, deflate, etc.) and emphasizes minimal memory usage and high throughput. Also provides detailed performance stats.
zisofs-tools
The zisofs filesystem is an extension to the ISO9660 filesystem that allows files, on a file-by-file basis, to be stored compressed and decompressed in real time. The zisofs filesystem is supported by recent versions of Linux (2.4.14 or later). Legacy systems can still read uncompressed files. zisofs-tools contains the tools necessary to create such a […]
DOGG’s Compression Ratings
A rating of roughly 20 different compressors - strictly based on size.
Generating random numbers
An article by Eric Uner talks a bit about generating reandom numbers, something we all want to do from time to time.
http://www.embedded.com/showArticle.jhtml?articleID=20900500
SimplyZip
Does everything you want, and costs a lot less than the two market leaders!
Version 3.0 is shipping as of June, 2004.
