公开(公告)号：EP0772156A3

公开(公告)日：1998-07-08

申请号：EP96307858

申请日：1996-10-30

申请人： XEROX CORP

发明人： BANTON MARTIN E

IPC分类号： B41J2/44 ,  B41J2/45 ,  B41J2/455 ,  B41J5/30 ,  G06F3/12 ,  G06T3/60 ,  H04N1/387

CPC分类号： G06T3/606

摘要： Described herein is a method and apparatus for consistently rotating high addressability bitmap images to be rendered on a printing system. A first step encodes the high addressability image to produce a regular bitmap array and then rotates the regular array. A compact dot growth operation is applied to assure that exposure pulses for any gray pixels are consistently positioned to provide a consistent output which is independent of the rotation direction.