| 一种加网图像去网的算法 |
| |
| 引用本文： | 刘浩学,杨文杰,王克蒙,武兵.一种加网图像去网的算法[J].武汉大学学报(信息科学版),2006,31(9):769-772. |
| |
| 作者姓名： | 刘浩学 杨文杰 王克蒙 武兵 |
| |
| 作者单位： | 北京印刷学院印刷与包装工程学院,102600 |
| |
| 基金项目： | 北京市教委科研项目;重点建设学科资助项目 |
| |
| 摘 要： | 采用查找网点中心的方法，计算出任意加网图像的网点网格，按网格中网点的面积率来转换成灰度值，改变二值图属性，从而达到去网的目的。实验结果表明，去网效果与加网图像的分辨率、加网线数、加网角度等因素有关。使用此算法可以得到较满意的去网效果，可以合成出满足打样要求的彩色图像，用于RIP后图像的数字打样。
|
| 关 键 词： | 二值图像 去网算法 软打样 网点拷贝 |
| 文章编号： | 1671-8860(2006)09-0769-04 |
| 修稿时间： | 2006年6月26日 |
A Computing Method of Descreen for Halftone Image |
| |
| LIU Haoxue,YANG Wenjie,WANG Kemeng,WU Bing.A Computing Method of Descreen for Halftone Image[J].Geomatics and Information Science of Wuhan University,2006,31(9):769-772. |
| |
| Authors: | LIU Haoxue YANG Wenjie WANG Kemeng WU Bing |
| |
| Abstract: | The descreen methods for color or grayscale images captured by scanner are generally blur arithmetic.But for halftone image generated by RIP the blur arithmetic is useless because the image is bi-level bitmap one so that it is of only 0 and 1 two levels.The descreen method is based on a very different arithmetic,it finds out the center of halftone cell and screen ruling parameters first,and then divides the image into halftone cell.By computing dot area percentage in each halftone cell and converting its value to the grayscale,the halftone dots would be eliminated.The computing results show that the descreening results dependent upon the resolution,screen ruling angle and frequency of the halftone image.The descreen effect of this method is reasonable good and a full color image can be composed from 4 RIPed separation images.The method can be used to digital soft proof based on the RIPed separation images. |
| |
| Keywords: | halftone image descreen algorithm soft proof copy dot |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
