Quote:
Originally Posted by sjfan
The OP is probably conflating compression with lossiness. ZIP* is lossless, à la FLAC or PNG. ...
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Correct for ZIP archives, but not so with PNG.
PNG (Portable Network Graphic) is a bitmap format and not a compression algorithm. PNG images can be compressed or uncompressed, and if compressed can use either lossless or lossy compression. It is quite false to assume that PNGs are compressed or that if compressed the compression is lossless.