Is the PNG Format Lossless Since it Has a Compression Parameter?
The PNG format is supposed to be a lossless format, but when you save an image as a PNG file, you are asked to choose a compression level. Does this mean that the PNG format is actually not lossless after all? Today’s SuperUser Q&A post helps clear up the confusion for a curious reader.
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by Akemi Iwaya via How-To Geek
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