A technique combines most of the advantages of both blue noise and clustering in generating a clustered aperiodic mask and using it in a dither array algorithm for halftoning. The method of halftoning of grey scale images utilizes a pixel-by-pixel comparison of the image against a clustered aperiodic mask in which the clustered aperiodic mask is comprised of a partly random and partly deterministic single valued function which is designed to produce visually pleasing dot configurations when thresholded at any level of grey.
申请公布号
US5917951(A)
申请公布日期
1999.06.29
申请号
US19970943881
申请日期
1997.10.03
申请人
INTERNATIONAL BUSINESS MACHINES CORPORATION
发明人
THOMPSON, GERHARD ROBERT;TRESSER, CHARLES P.;WU, CHAI WAH