there is zfp for lossy compression: https://computing.llnl.gov/projects/zfp https://computing.llnl.gov/projects/zfp I've also seen a project that rolled their

there is zfp for lossy compression: https://computing.llnl.gov/projects/zfp https://computing.llnl.gov/projects/zfp I've also seen a project that rolled their own using a discrete cosign transformation + run length encoding. I'm not sure how good it was.