Toward more efficient and effective color quality control for the large-scale offset printing process

IF 2.3 4区 化学 Q1 SOCIAL WORK Journal of Chemometrics Pub Date : 2024-03-15 DOI:10.1002/cem.3543
Pawel Dziki, Lukasz Pieszczek, Michal Daszykowski
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Abstract

This study illustrates at-line application of hyperspectral imaging in the visible range for quality control of large-scale offset printing. In particular, the measurement stability of a competitive device is assessed and compared to traditional handheld and desktop spectrophotometers. The performance of the commercially available instruments was assessed based on collected spectra and their corresponding L*, a*, and b* values. The printing process was described by hyperspectral images (in visible range) of selected regions from template color fields acquired at 17 sampling occasions. Spectra constituting hyperspectral images were visualized and evaluated in the space of significant principal components obtained from the principal component analysis. Furthermore, confidence ellipses were constructed for each set of spectra characterizing a specific moment of the printing process. Comparing their mutual locations, shapes, orientations, and sizes enabled effective visualization of process variability and was more comprehensive regarding the classic approach based on information provided by desktop and handheld spectrometers.

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为大型胶版印刷工艺提供更高效、更有效的色彩质量控制
本研究说明了在可见光范围内高光谱成像在大规模胶版印刷质量控制中的在线应用。特别是评估了竞争设备的测量稳定性,并与传统的手持式和台式分光光度计进行了比较。根据收集到的光谱及其相应的 L*、a* 和 b* 值,对商用仪器的性能进行了评估。印刷过程是通过在 17 次采样中从模板色域采集的选定区域的高光谱图像(可见光范围)来描述的。构成高光谱图像的光谱在通过主成分分析获得的重要主成分空间中被可视化和评估。此外,还为每组光谱构建了置信椭圆,以描述印刷过程的特定时刻。通过比较它们的相互位置、形状、方向和大小,可以有效地将过程的可变性可视化,与基于台式和手持式光谱仪所提供信息的传统方法相比,这种方法更加全面。
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来源期刊
Journal of Chemometrics
Journal of Chemometrics 化学-分析化学
CiteScore
5.20
自引率
8.30%
发文量
78
审稿时长
2 months
期刊介绍: The Journal of Chemometrics is devoted to the rapid publication of original scientific papers, reviews and short communications on fundamental and applied aspects of chemometrics. It also provides a forum for the exchange of information on meetings and other news relevant to the growing community of scientists who are interested in chemometrics and its applications. Short, critical review papers are a particularly important feature of the journal, in view of the multidisciplinary readership at which it is aimed.
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