Method of bit depth reduction for an apparatus

摘要

A method of bit depth reduction for an apparatus includes establishing a human visual response versus relative luminance, the human visual response being defined by 2^M levels; determining a scanner response versus the relative luminance for at least one channel of scanner data, the scanner response being represented by N-bit per channel data, wherein N is greater than M; relating the human visual response to the scanner response; and quantizing the N-bit per channel data to M-bit per channel data according to the human visual response.