公开(公告)号：US6160913A

公开(公告)日：2000-12-12

申请号：US47660

申请日：1998-03-25

申请人： Yongchun Lee ,  Stanley A. Mielcarek ,  Joseph M. Basile ,  Louis J. Beato

发明人： Yongchun Lee ,  Stanley A. Mielcarek ,  Joseph M. Basile ,  Louis J. Beato

IPC分类号： G06T5/00 ,  H04N1/40 ,  G06K9/56 ,  G06K9/62

CPC分类号： H04N1/40093 ,  H04N1/40062

摘要： An image processing method for detection and removal of halftone dots includes converting a gray scale image into a binary thresholded image with halftone dots; identifying halftone regions within the binary thresholded image; and removing halftone dots from the identified halftone regions. The identifying halftone regions step is effected by classifying the binary thresholded image to produce a halftone classification map; reclassifying the halftone classification map to produce a halftone reclassification map of lines with plural halftone pixels in each line; merging the halftone pixels in each line in the halftone reclassification map to produce a halftone line map; and merging the lines of the halftone line map to produce a halftone region map.

摘要翻译： 用于检测和去除半色调点的图像处理方法包括将灰度图像转换成具有半色调点的二值阈值图像; 识别二进制阈值图像内的半色调区域; 并从识别的半色调区域去除半色调点。 识别半色调区域步骤通过对二进制阈值图像进行分类以产生半色调分类图来实现; 重新分类半色调分类图以产生在每行中具有多个半色调像素的线的半色调重新分类图; 合并半色调重新分类图中每行中的半色调像素以产生半色调线图; 并且合并半色调线图的线以产生半色调区域图。