包装学报
包裝學報
포장학보
Packaging Journal
2015年
4期
41-46
,共6页
印刷品质量%G7控制参数%灰平衡%定性指标评价
印刷品質量%G7控製參數%灰平衡%定性指標評價
인쇄품질량%G7공제삼수%회평형%정성지표평개
printing quality%G7 control parameter%gray balance%qualitative assessment
利用G7工艺中的HR、HC、SC以及NPDC参数来控制包装印刷机的灰平衡,采用客观评价和主观评价的实验方案,即通过对G7校正前后的输出样张进行测量,得到客观测量数据,再结合主观测试样张,利用定性指标评价方法和质量方程获得印刷品的综合质量分数,以评判控制的有效性.灰平衡控制后输出的印刷品HC_CMY值与G7标准值的偏差为8%,比校正前提高了24%,HR_CMY值与G7标准值的偏差为3.7%,比校正前提高了10.3%;HC_K值、HR_K值与G7标准值无偏差;CMY的NPDC与G7标准曲线在0~40%范围内拟合程度较好,在40%~50%和55%~70%范围内与标准曲线的偏差范围为[0, 0.05];图像质量指标中的中性灰指标分数较灰平衡控制之前增加了18.3%.所提供的具体实践与评价方法及其研究结果表明:控制灰平衡可以有效地控制印刷品的质量.
利用G7工藝中的HR、HC、SC以及NPDC參數來控製包裝印刷機的灰平衡,採用客觀評價和主觀評價的實驗方案,即通過對G7校正前後的輸齣樣張進行測量,得到客觀測量數據,再結閤主觀測試樣張,利用定性指標評價方法和質量方程穫得印刷品的綜閤質量分數,以評判控製的有效性.灰平衡控製後輸齣的印刷品HC_CMY值與G7標準值的偏差為8%,比校正前提高瞭24%,HR_CMY值與G7標準值的偏差為3.7%,比校正前提高瞭10.3%;HC_K值、HR_K值與G7標準值無偏差;CMY的NPDC與G7標準麯線在0~40%範圍內擬閤程度較好,在40%~50%和55%~70%範圍內與標準麯線的偏差範圍為[0, 0.05];圖像質量指標中的中性灰指標分數較灰平衡控製之前增加瞭18.3%.所提供的具體實踐與評價方法及其研究結果錶明:控製灰平衡可以有效地控製印刷品的質量.
이용G7공예중적HR、HC、SC이급NPDC삼수래공제포장인쇄궤적회평형,채용객관평개화주관평개적실험방안,즉통과대G7교정전후적수출양장진행측량,득도객관측량수거,재결합주관측시양장,이용정성지표평개방법화질량방정획득인쇄품적종합질량분수,이평판공제적유효성.회평형공제후수출적인쇄품HC_CMY치여G7표준치적편차위8%,비교정전제고료24%,HR_CMY치여G7표준치적편차위3.7%,비교정전제고료10.3%;HC_K치、HR_K치여G7표준치무편차;CMY적NPDC여G7표준곡선재0~40%범위내의합정도교호,재40%~50%화55%~70%범위내여표준곡선적편차범위위[0, 0.05];도상질량지표중적중성회지표분수교회평형공제지전증가료18.3%.소제공적구체실천여평개방법급기연구결과표명:공제회평형가이유효지공제인쇄품적질량.
By using HR, HC, SC and NPDC parameters in G7 technology to control the gray balance of the printing machine, the experimental scheme of the objective and subjective evaluation was adopted. By measuring the printing proofs before correction and corrected by G7, with the objective measurement data and the subjective test sample, the comprehen-sive printing quality was obtained by using the qualitative evaluation methods and quality indicator equation in order to assess the effectiveness of control. Results showed the printing's HC_CMY value after the gray balance controlled printing machine had a 8% deviation compared with the standard of G7, and 24% higher than that before correction;HR_CMY value had a 3.7% deviation compared with the standard of G7, and 10.3% higher than before correction, there was no deviation in HC_K, HR_K value and the standard of G7; the NPDC of CMY had a better fitting degree with the standard curve of G7 in the range of 0 to 40%; in 40% to 50% and 55% to 70% of the standard deviation of the curve was in the range [0, 0.05]. The neutral gray index score in image quality was 18.3% higher than that before the gray balance control. The practice and evaluation methods indicated that the gray balance control could effectively control the print quality.
