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pngcrush can also change the color type of the image. For a true-color image, changing the color type from 2 to 0 converts it to greyscale. Greyscale images are generally smaller than truecolor images because, in addition to the optional alpha channel, only one 8-bit channel is used per pixel rather than three. Greyscale images are also ...
The software has received awards, In 2007, SourceForge granted it community choice awards for "Technical Design" and for "Best Project". [42] In 2013, Tom's Hardware conducted a compression speed test comparing 7-ZIP, MagicRAR, WinRAR , WinZip; they concluded that 7-ZIP beat out all the others with regards to compression speed, ratio, and size ...
Guetzli optimizes the quantization step of encoding to achieve compression efficiency. It constructs custom quantization tables for each file, decides on color subsampling, [4] and quantizes adjacent DCT coefficients to zero, balancing benefits in the run-length encoding of coefficients and preservation of perceived image fidelity.
Windows archivers and compression-related utilities (1 C, 1 P) Pages in category "Data compression software" The following 28 pages are in this category, out of 28 total.
compress is a Unix shell compression program based on the LZW compression algorithm. [1] Compared to gzip's fastest setting, compress is slightly slower at compression, slightly faster at decompression, and has a significantly lower compression ratio. [2] 1.8 MiB of memory is used to compress the Hutter Prize data, slightly more than gzip's ...
The original PC Tools package was first developed as a suite of utilities for DOS, released for retail in 1985 for $39.95. [1]With the introduction of version 4.0, the name was changed to PC Tools Deluxe, and the primary interface became a colorful graphical shell (previously the shell resembled PC BOSS and was monochrome.)
The specification has its own version number, which does not necessarily correspond to the PKZIP version numbers, especially with PKZIP 6 or later. At various times, PKWARE adds preliminary features that allows PKZIP products to extract archives using advanced features, but PKZIP products that create such archives won't be available until the ...
In February 2021 Zamzar expanded their tool and announced a new file compression service. [10] The compressor is visually similar to the conversion tool with a drag and drop download feature. As with the converter, users have the option to subscribe for a paid plan if they wish to compress multiple or larger files than the free service permits [11]