alt Hacker NewsLossless means that the file encodes the exact same information that was given to the encoder. This is a property of the format.
Lossless means that the file encodes the exact same information that was given to the encoder. This is a property of the format.
Yes but people add pre-preprocessor steps to image formats, like blurring jpegs or lowering bit depth in PNGs to make them more compressible.