发明名称 Systems and methods for compensating for streaks in images
摘要 Defects in an image may give rise to visible streaks, or one-dimensional defects in an image that run parallel to the process direction. One known method for compensating for streaks introduces a separate tone reproduction curve for each pixel column in the process direction. A compensation pattern according to this invention ha alignment marks before and after a halftone compensation region. The alignment marks provide alignment between the printer pixel grid and a scanning pixel grid. The line width of each alignment mark and the gray level in each pixel column of each gray level portion is measured and analyzed to produce a local tone reproduction curve for each pixel column and associated line width. The line widths of the alignment marks can be remeasured to adjust the local tone reproduction curves to compensate for the streak defect when printing.
申请公布号 US2006244776(A1) 申请公布日期 2006.11.02
申请号 US20060476009 申请日期 2006.06.28
申请人 XEROX CORPORATION 发明人 MIZES HOWARD A.
分类号 B41J29/393;B41J29/46;G03G15/00;G03G21/00;G06K15/02;H04N1/40 主分类号 B41J29/393
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