JunHak Lee Takahiko Horiuchi Shoji Tominaga Multi-Level Confined Error Diffusion Algorithm for Flat Panel Display. 62-69 2008 91-D IEICE Transactions 1 http://dx.doi.org/10.1093/ietisy/e91-d.1.62 db/journals/ieicet/ieicet91d.html#LeeHT08