中国印刷与包装研究
中國印刷與包裝研究
중국인쇄여포장연구
CHINA PRINTING AND PACKAGING STUDY
2009年
3期
38-42
,共5页
调幅加网%有理正切%阈值矩阵%12×12网格
調幅加網%有理正切%閾值矩陣%12×12網格
조폭가망%유리정절%역치구진%12×12망격
AM screening%Rational tangent%Threshold matrix%12×12 halftone cell
本文针对报纸印刷和精细商业印刷中常用的加网线数,基于最小阈值矩阵原理,详述12 × 12网格的最小阈值矩阵的设计原则.并提出一种网线角度差小于1*的阈值矩阵设计方法,较好地解决了有理正切加网网线角度如何接近15°这一核心技术问题.同时,阐述了用此阈值矩阵实现灰度图像有理正切调幅加网的具体过程.
本文針對報紙印刷和精細商業印刷中常用的加網線數,基于最小閾值矩陣原理,詳述12 × 12網格的最小閾值矩陣的設計原則.併提齣一種網線角度差小于1*的閾值矩陣設計方法,較好地解決瞭有理正切加網網線角度如何接近15°這一覈心技術問題.同時,闡述瞭用此閾值矩陣實現灰度圖像有理正切調幅加網的具體過程.
본문침대보지인쇄화정세상업인쇄중상용적가망선수,기우최소역치구진원리,상술12 × 12망격적최소역치구진적설계원칙.병제출일충망선각도차소우1*적역치구진설계방법,교호지해결료유리정절가망망선각도여하접근15°저일핵심기술문제.동시,천술료용차역치구진실현회도도상유리정절조폭가망적구체과정.
Aiming at the common screening ruling used in the newspaper print and commercial print with high resolution, based on the minimum threshold matrix theory, the paper describes the design principle of the minimum threshold matrix when the halftone cell is 12×12. In order to overcome the key problem how the screen angle of the rational tangent screening algotithm approaches 15°, the paper proposes a design method of the threshold matrix which can make the difference between the screen angles be less than 1° , and further expounds the procedure of the AM screening for,grey images realized by the rational tangent screening algorithm with minimum threshold matrix in detail.
