This reminds me a bit of Amiga HAM. Similar horizontal fringing.
I guess you could also call Amiga's HAM graphics mode a compression method. Getting 12-bit (4096 colors) with just 6 input bits, with the original Amiga chipset, often called as "OCS".
Or later 262144 colors with 8 input bits, with the AGA chipset.
I guess you could also call Amiga's HAM graphics mode a compression method. Getting 12-bit (4096 colors) with just 6 input bits, with the original Amiga chipset, often called as "OCS".
Or later 262144 colors with 8 input bits, with the AGA chipset.