PNG TO PNG COMPRESSOR PORTABLE

Fireworks uses the PNG format to save its internal files, and PNG’s 16 bit grayscale capability makes it useful for accurate radiological imagery. PNG has a number of features that make it appealing to the medical and graphics industries. Typically images with large flat areas of color compress better than smooth-toned images with many color transition areas. In our tests, we found some images can compress 40% to 50% smaller or more (over 85% in one example) depending on the image. Not surprisingly, images saved as PNGs are typically 10% to 30% smaller than GIFs, although in rare cases they can be larger (5,6).

Nine is almost always the best setting for maximum compression ratio. Like gzip, some PNG compression tools have an optional “compression ratio” with values ranging from one to nine. Created by Phil Katz for version 2 of PKZip, deflate combines LZ77 with Huffman encoding and is 10% to 30% more efficient than LZW at lossless compression. Deflate is an improved version of the Lempel-Ziv compression algorithm (LZ77) used in ZIP and GZIP files (3,4). PNGs uses the deflate compression algorithm typically with a 32KB sliding window. By replacing your GIFs with PNGs you can speed up your web pages and save bandwidth. While Unisys’ patent has expired, the reasons for switching to PNGs from GIFs remain (2). PNG was created in 1995 as a response to Unisys’ enforcement of their patent on the LZW compression algorithm used in GIFs. PNG is designed to store a single bitmapped image to display over computer networks (1).

PNG TO PNG COMPRESSOR PORTABLE

The Portable Network Graphics (PNG) format is designed to be a more efficient, flexible, and patent-free replacement for GIFs.

Png to png compressor