Lossless compression can be made lossy by slightly modifying every pixel in ways that make them compress better. E.g. if there is a random black pixel in the mi

Lossless compression can be made lossy by slightly modifying every pixel in ways that make them compress better. E.g. if there is a random black pixel in the middle of a white field, just make it white and you save 3 bytes. That's how lossy PNG works. IMO that's a more elegant way of doing lossy compression.